Electronic Toolbox News ETB App Internal

Online Projects and Data Update

Dear Users,

sorry, the Online Projects section was offline shortly. It is now back online.

Projects of users

By the way, some users asked me for the possibility to add a “Projects from users” section, which I did. But so far, no user sent me his or her project. So I just like to remind and encourage you to share your projects with other users.

Don’t worry if it is too small, incomplete or not professional enough from your point of view. I am pretty sure everybody will appreciate it. I remember somebody told me he has a lot of oscillator circuits. That would be a great example.

If you need some help or have questions, please let me know. I would be more than happy to help.

Some updates regarding updates

I hope to complete the next data update soon. It took me quite some time to collect all the requested information but it’s complete now and ‘just’ needs to be converted for the data update.

The next App update will take some more time but I am already working on it for quite some time now. I will keep you updated about it.

Thank you!

Many many thanks by the way for all your reviews. I really really appreciate. It is so essential nowadays to have reviews that I really appreciate. I think I saw one or two of people with issues but they didn’t contact me so I can’t help – unfortunately.

Thanks again.

Best Regards,


App News - General News about my Apps Electronic Toolbox News RF-Toolbox News

Version 8 is available!

Version 8 of Electronic Toolbox and RF-Toolbox available!

As announced, the version 8 of both apps is finally available on the app store.

This was again a bigger update with a lot of new features, tools, bells and whistles and of course, bug fixes.

The most important changes are:

  • 64 Bit support
  • iPhone 6 and 6 Plus support
  • Native iCloud Drive support
    • Share Projects between apps on different Devices
    • Share Projects between Electronic- and RF-Toolbox
  • iOS 8.x support
  • Introduction of online Projects
  • Introduction of a FAQ
  • New Tools
    • New Beagle Bone Tool (ETB only)
    • New Wheatstone Bridge calculator
    • New Truth table / Karnaugh table / logic formula conversion tool (ETB only)
    • New Frequency counter tool
    • New Logic tool (ETB only)
    • Balun Calculator (RF Toolbox only)

So there are now 77 tools in total in Electronic Toolbox and 60 in RF-Toolbox.

Some more details:

Tool Improvements:

  • Improved Coil calculation now with single- multi- ferrite-core, Tesla flat and straight wire
  • Introduction of scalable formulas. Formulas now look much better throughout the app and not so big anymore.
  • The sound Generator can now still run even when leaving the tool
  • The sound Generator now has a volume slider
  • A double-tap is now necessary to zoom images. No longer accidental image zooming
  • In the scope, the scale for FFT is now linear and easier to read
  • An FAQ has been introduced for common questions regarding this app.
  • Values from the Database tools such as the Transistors tool can now be added to projects and now includes all parameters as it already was for calculation tools
  • Bigger selection lists (e.g. for the color selection in the resistors tool)

Content changes:

  • Tube 807 pinout added
  • Raspberry Pi Model 2 added

Project improvements:

All Project maintenance screens have been improved. However, the most important changes here are the support for iCloud Drive and the introduction of Online projects.

iCloud Drive can now be used to keep your projects in sync between your different devices and even between Electronic- and RF-Toolbox. In the past, you had to export and import projects in order to transfer a Project from one Device to another. When switching on iCloud Drive in the app, Projects will automatically synchronized in the background.


  • Now global search will work again even when in Icon mode
  • Some NTC/PTC tool corrections
  • Some corrections inside the Sockets tool

And of course, several bigger and smaller design changes.

This again a quite long list of changes and improvements. However, some of you might miss something you asked me for but that was just one more update and there are more to come over the time. As usual, I am already working on the next update.

Please don’t forget:

As with every update, please don’t forget to rate this app as all previous reviews will disappear with an update.

Also, since there were many changes and even though there was a quite long testing phase, there might be bugs in the app. If you find a bug, just let me know and I will fix it quickly. Promised!

Thank you so much for your great support and suggestions.

Best regards,


Electronic Toolbox News RF-Toolbox News

Happy New Year 2015!

The recent data update for Electronic Toolbox contains several changes to many databases. The new app versions of Electronic- and RF-Toolbox are almost finished. Just a bit additional coding and some testing.

The new version will then also fix the searching issue which exists in the current version of Electronic Toolbox. (As a reminder: If you want to use global search for e.g. search for a BC107 without starting the transistor tool, you can enter BC107 in the top search fields. However, and that’s the bug, you need to switch from Icon mode to list mode in order to let searching work).

So stay tuned for further announcements.

Meanwhile, I wish you and your Families a Happy New Year and all the best for 2015!



App News - General News about my Apps Electronic Toolbox News

New Electronic Toolbox data update available

Today, a new Electronic Toolbox data update has been released.

This updates contains the following changes:

  • Arduino Uni Rev 3 Pinout added
  • New Category in the ICs Tool with Solid State Relays (SSR)
  • Raspberry Pi Model B+ additions
  • Constants were updated
  • A few ICs were added as requested
  • A few German language corrections were included

And finally, this update also contains some preparations for the next app update I am currently working on.

Thanks again for your support.

Best regards,

App News - General News about my Apps Electronic Toolbox News

Update 7.01.05 of Electronic Toolbox available

Fortunately, it doesn’t took too long for Apple to release this bug fix update.

This update fixes a few bugs that unfortunately slipped in to the last major update:

Device rotation will now work correctly
■ German “Zurück” button fixed
■ Few issues with 3.5″ iPhones fixed (e.g. second slider in Oscilloscope)
Capacitor charge calculation fixed
■ Open image in other… app bug fixed
Duty cycle calculation in NE555 tool fixed
■ An issue that cause the app to crash when swiping back was fixed
■ White-on-white buttons in print screen was fixed

Along with this, the update contains the following improvements:

■ The 4-20mA tool now also shows Hexadecimal values for SPS development
■ Calculation results can now be transferred better to projects (no longer just screenshots)
■ Some speed improvements (e.g. esp. for iPad 2)
Oscilloscope image can now be added to a project

LIKE ALWAYS, PLEASE NOTE: Don’t forget to install the new data update as well

Again, many thanks for your feedback and help to improve this app further.

Many many thanks also for your updated and new app reviews.

Unfortunately, with every update I sent out, your previous reviews disappear. But you just need to slightly update your previous review to let it appear again. Many thanks again for this.

Kind regards,


App News - General News about my Apps Electronic Toolbox News

New version 7 finally available!

Finally, as announced yesterday, the new version of Electronic Toolbox Pro is now available on the AppStore.

I have re-coded huge parts of the app. Basically, this release changes many things under the hood, adds many general features you have asked for, offers a completely revised and freshen up user interface and fixes many small or even a few larger bugs. Finally, it adds a new cool tool: an oscilloscope. Also, this app is now already compatible to the recently announced iOS 8.

Here are some changes to the previous version:

■ UI Improvements

The user interface has been freshened up and now uses some remaining iOS 7 features such as special animations, list swiping, popover selections, the new keyboard and some more. To implement those features, unfortunately I had to drop IOS 5 support but the app still supports iOS 6.

However, don’t worry if you don’t want or can’t update to iOS 6 or 7, you can still use the existing Version 6 of the app as it will still be available on the AppStore for downloading and best of all, it will still get improvements via Data updates.

On the special keyboard, you can now double-tap on the X button to clear all input field of the whole screen (Thanks Hal for this suggestion).

Amongst this, every single tool has been revised. They not just look and behave now more consistently.

■ Parametric search improvements

When looking for a certain Transistor, FET or even Tube with certain characteristics / parameters, filters can be used. These filters have been improved in Version 7. It is now even possible to create multiple filters which can be stored and recalled at a later time.

■ iCloud and improved DropBox and iTunes support

DropBox and iTunes have already been supported to import and export projects. Now, Project import and export has been improved in many ways and iCloud has been added as another option for importing and exporting.

In Addition, app settings and your Organizer app customizations can also be saved and restored to and from iCloud. This way, you can save your work after rearranging all icons to your individual requirements. Moreover, you can use iCloud to transfer these settings to another i-Device if you own more than one device. This way, you can use your settings and organizer view consistently on all your devices.

■ Improved action button

The action button now has a new icon and will now act as a real action button. Now, it always opens a popup menu with several options based on the current situation.

■ Grouped Tool view

For those of you, who got lost in the numerous tools (now 72) the app now provides a new grouping option. By selecting this option, tools will now be grouped by the following subjects:

  • General Tools
  • Tools dealing with passive components
  • Tools dealing with active components
  • Conversion tools
  • Circuit tools
  • RF related tools

You can still group and arrange tools based on your own preferences and even mix the grouped view with your own groups by using the included organizer.

■ An Oscilloscope was added

Now, with this new tool, the app contains 72 tools in total. Several more are already under development. This Oscilloscope behaves almost like a real Oscilloscope but of course limited to audio signals and microphone input.

■ Bug fixes and minor improvements

While working on each tool, I did also fix some bugs of course.


While almost 70% of the code has been re-coded, I already apologize for any possible new bug which is not unlikely due to this amount of new code, even though I and a couple of Beta Testers have tested this release (many thanks to you at this point).

As always, please let me know about any bug, ideally using the support button inside the app and I promise to fix any bug real quick.

Again, many thanks for your feedback.

Please please don’t forget to rate the app or update your review. Unfortunately, with every update I sent out, your previous reviews disappear. But you just need to slightly update your previous review to let it appear again. Many thanks for this.

Kind regards,


App News - General News about my Apps Electronic Toolbox News

Finally another update 6.10.02 of Electronic Toolbox is now available

Finally, the promised update has been released.

This update includes the following changes and additions:

■ Trace-With tool

This tool was moved over from the RF-Toolbox app and helps to calculate width of internal or external PCB striplines based on the IPC-2221 charts.

■ Resistor/Capacitor/Inductor combinations tool

This tool helps to create a certain value by calculating various combinations of serial or parallel connected components. This is especially useful if you can’t find a component with a certain value in your shack or if you need to create a value outside the E-Series standard. So if you are looking for a 10k resistor but have none available, you can just use this tool to find out how to build this value with a certain combination of other resistors.

■ 4-20mA conversion tool

This new tool converts values based on the instrumentation systems 4-20mA DC standard. This was a user request from some users and I was hoping to implement it sooner but finally, here it is.

■ support for oz/ft² (Copper Plating Weight in oz)

Especially for the newly added PCB trace calculation (see above), thickness can be entered in oz/ft² .

■ calculator degree / radian support

The trigonometric functions like sin() and cos() can now calculate in radians and degrees and there is a new button which can be used to switch between these two. However, the degree button ° can still be used to convert values from degree to radians, thus when set to radians and calculating sin(45°) results in the same value as if the calculation is set to degree and entering sin(45) .

■ unit tool improvements

The unit tool received some more improvements and now remembers previously selected unit types and units.

■ New Transistor tool added

A new Transistor tool replaces the former BJT tool. This tool adds bias point calculations and circuit calculation of the three common Transistor circuit types.

■ New FET tool added

Similar to the Transistor tool, a new tool to calculate FET bias point and basic FET circuits has been added.

■ NE555 tool improvement

In the NE555 tool, it is now possible to calculate the duty cycle.

■ NTC/PTC tool improvement

It is now possible to calculate in both directions. You can either enter temperature or resistance and the other value will be calculated.

■ Disable sleep mode

Some users told me that they use my app in the lab all the day and leave their device switched on all the time to quickly perform some calculations. They asked me for the possibility to let the App prevent the device from entering the sleep mode to speed up their access to this app. For this reason, there is now a new setting under Miscellaneous. Please note that, once this setting is on, the device will no longer save battery time. Once you exit the app, everything is back to normal. You may also want to disable the splash screen along with this setting.

■ Additional Types and datasheets

Included in the data update which is required for this app update, several new types and datasheets have been added. For instance about 300+ new datasheets and types in the 40xxx/45xxx cmos IC section. Also, some corrections for the AVR JTAG Socket, 3N140 and 4073 are included.

■ Additional minor improvements

Now, in the calculator, it is no longer necessary to hit the ANS key when entering an operator after the previous calculation has been finished.

PLEASE NOTE: A new major release will also be available soon. It has now been sent to Apple and is waiting for being released. This major release contains some other user requests and improvements so please don’t worry if your request is not included in this release.

In case you find an error or have some questions, please contact me using the Support button inside the app or the support form on the website.

Many thanks for your feedback and your support.

Kind regards,


App News - General News about my Apps Electronic Toolbox News

Update Version 6.07.01 for Electronic Toolbox available

Thank Goodness it’s Friday! as the new Electronic Toolbox update 6.07.01 is now available.

This update fixes some issues that have been reported such as the not working “Add to project” buttons in some areas of the app and the inability to add folders in the organizer. Sorry for that.

Now, in the unit conversion tool, it is again possible to see all other conversions at a glance like in the older version. All possible conversions can now be observed by tapping on the selection below “Convert to:”. Thanks for this suggestion!

There is now a consistent way to decide which value should be calculated and which are the “given” values.

As an example, in the Ohm’s law tool, let’s say you like to calculate Current and Power based on Voltage and Resistance. You can tap on the small button in front of the Current and Power fields. These buttons will then turn to have a small arrow indicating that these values will be calculated.

Now, it is also possible to tap at the location where you expect an input field in order to get the white input field for entering a value.

You will also notice a change in the user interface. I have changed several areas throughout the whole app so that it fits better to iOS 7. There are new Icons, new fonts, less 3D buttons and headers and less rounded rectangles. I personally like it much better and hopefully you do too.

Also, the News section has been completely re-coded. It is now also possible to delete news entries.

Finally, I found that the review button was no longer working in the previous version and that was probably why there were just a few review updates with the last version.

So now, it should again be possible to write or update reviews.

The data update I sent out on Wednesday is mandatory for this app update so please also check if you have not yet installed it. Here is a short summary of the contents of the data update:

  • LM34 (Precision Fahrenheit Temperature Sensors) added to the ICs tool
  • 2N6027 and 6028 (Programmable Unijunction Transistor) added to the ICs tool
  • The upcoming Arduino Tre and the older Arduino Duemilanove were added
  • An update to the Italian translation was added (thanks Massimo!)
  • Several changes to the Info texts in German and English.

The two added chips LM34 and 2N6027/8 are both quite interesting. I never heard about them before until two users asked me to add them (thank you!).

Like alway, many thanks to you all who helped me to continuously improve my app.

Please don’t hesitate to write me if you find an issue or ask me to add new features or components.

Many thanks and kind regards and have a great weekend!


App News - General News about my Apps Electronic Toolbox News

Windows 8 update available now and iOS Version comming on Friday

Fortunately, the new Windows version of Electronic Toolbox was just released by Microsoft and the iOS Update will be available this Friday.

Lately Microsoft gave me a hard time to fulfill all requirements for the naming of screen shots on the Windows Store and several additional minor requirements. The good thing is though, that Microsoft takes Store approving serious – which is good, for you as customer as well as for me as developer and customer. I hate the lax or even not existing Google approvement procedure which causes many rubbish, non-working, faking and Trojan apps on the Android play store.

However, back to the Windows version, which includes many changes such as:

[su_list icon=”icon: windows”]

  • New NTC / PTC tool – New Raspberry Pi tool
  • New Constant current source tool
  • New AC Ohms Law tool
  • New ASCII Table tool
  • New Zener Diode tool
  • Instrumentaion OpAmp calculation
  • New languages for the User Interface: German, Italian, French, Spanish, Japanese, Chinese (Simplified and Traditional)
  • Updated Databases
  • Some changes for Windows 8.1
  • Some Bug fixes and many additional minor changes


The Windows version is available here.

iOS update

The iOS Update, as mentioned, will be available this Friday. It contains quite some fixes and internal improvements. I will talk about that on Friday so please stay tuned.

In addition to the app update, I will create another data update which will be available either today or tomorrow.

Kind regards,


App News - General News about my Apps Electronic Toolbox News

Data update for Electronic Toolbox available

A new data update is available for Electronic Toolbox.

This data update includes some changes in the transistor database (which is why this update is a big bigger than usual) and will correct the Avagadro’s number.

For the German users, there are also some added translations included.

Finally, it includes some new ICs as requested such as the OPAx134, LME497x0 and LM4562.

A new app update will also come soon. I expect to send it to Apple next week. The next app update will mainly correct a few mistakes that have been slipped in with the last update like the inability to add components to a project in some of the tools and some other minor fixes. It will also come with a slightly changed design which fits better to the new flat iOS 7 design.

Thanks again for your support,

kind regards,


App News - General News about my Apps Electronic Toolbox News

New Electronic Toolbox Version available

The new Electronic Toolbox version 6.06.01 is finally out

This updates adds iOS 7 compatibility as well as a lot of changes and additions:

The following nine tools have been added:

■ Raspberry Pi Tool
■ Passive cooling calculator
■ PTC / NTC Temperature Resistance conversion
■ AC Ohms law tool
■ Zener diode circuit calculation
■ Constant current source tool
■ ASCII Table
■ Battery charge calculator
■ Finally, a desktop calculator

So there are now 67 tools included (all for free by the way for everybody who already purchased my App before). No extra costs, no InApp Purchase.

Some existing tools have been extended such as:

■ The OpAmp Tool now can also calculate an Instrumentation OpAmp circuit
■ The number system tool now also supports IEEE floating point numbers
■ The Measurements tool is now renamed to Units and has been completely revised (again)

Now, it is also possible to copy output results (regardless if this is text or a number) by long-tapping the value. This way, you can copy values easier from one tool to another or even to and from the new desktop calculator or other Apps.

■ iOS 5, 6 and 7 support

Electronic Toolbox is now compatible to iOS 5, 6 and 7 and it will run on all of these iOSes and all devices available from Apple, including the new iPhone 5S and 5C. However, iOS 6 or 7 is recommended in order to benefit from the additional features of the OS.

Finally, as usual, many other things have been changed and corrected under the hood.

For instance Circuit symbols can now easier be found as the symbol is already displayed at the overview level (thanks for this suggestion!) and the same now applies to other areas throughout this app.

■ More copy and paste

Now, it is also possible to copy output results (regardless if this is text or a number) by long-tapping the value. This way, you can copy values easier from one tool to another or even to and from the new desktop calculator or other Apps.

■ Tool Icons

The default color scheme is now the single colored blue scheme. But don’t worry if you like the colored scheme better where the tools will have different colors depending on the type of tool. Just go to settings, Appearance and switch the Icon color to ‘Classic color’.

Due to the additional tools, all tools have been rearranged a bit so that tools that belong together are side by side. If you have previously installed Electronic Toolbox and maybe arranged the icons by yourself, this update will not mess up your icons. Instead, the new Icons will be added at the end. So if you like to get the icons rearranged in the way I would suggest it, just go to the organizer and press the red Reset button.

■ Important Data update

Please note, along with this update, also a data update has been released. Please don’t forget to install the data update by using the “Check for data update” button in the settings screen of the app. The order of the installation (data update or app update) does not matter.

If you find an issue, have a new idea or if you are missing something, just let me know. Please just use the Support button in my App or on the AppStore.

I have still a lot of your ideas and requests on my to-do list and I am already working on the next update to include more of your ideas in the next update.

If you like to support me, please don’t forget to write or update your review as it is only valid for the current version.

Thanks again for all your mails and support.

Kind regards,


App News - General News about my Apps Electronic Toolbox News

New App Version available Friday September 27th

The new App Version 6.05 will be available on Friday!!

I am excited to announce that finally, the new App Version of Electronic Toolbox will be available this week on Friday the 27th of September.

There are nine additional tools but also many changes under the hood. I trust you will love the new version.

I will keep you updated here, once the version is available.

Please also note, along with the App version, there will be a new data update as well which is required for the new App version.

Kind regards,



Electronic Toolbox News

iOS 7 is here

Some of you may already have updated to iOS 7 and some are wondering if my Apps work on iOS 7.

As mentioned in my last post, yes, Electronic Toolbox and RF-Toolbox work fine with iOS 7 as it still does on iOS 5 and 6.

There is only one glitch I am aware of. The progress bar which is displayed e.g. when loading an update is displayed in white and iOS 7 uses a white background so the progress bar is invisible but besides that everything works fine.

So if you already have iOS 7 installed, just ignore the invisible progress bar and be just patient when waiting for the completion.

Of course, this glitch has been addressed in my recent update which has been sent to Apple recently.

I hope that Apple will release the new update of Electronic Toolbox soon (although they seem to be quite busy as there currently seem to be many updates waiting for being released) as the new update contains nine more tools you will love and several improvements.

Kind regards,


App News - General News about my Apps Electronic Toolbox News RF-Toolbox News

New dedicated website – new ideas

New website

I must admit that I am really overwhelmed with emotions about some of your mails and App reviews. Many many thanks! This really helps me to keep up my work and inspired many new ideas. I wished I would have 48 hours a day to implement all of that much quicker.

As you may have seen already, there is now a dedicated website for Electronic Toolbox and RF-Toolbox and they are no longer part of

This will better suit my future plans with Electronic- and RF-Toolbox. There is much to come over the next months so this new dedicated website (and .de) will allow me to better inform about these ideas in the future.

Thanks again for all your mails and support.

Kind regards,



App News - General News about my Apps Electronic Toolbox News

Just keep you updated

Dear users of Electronic Toolbox,

I just like to keep you updated about my current development activities. I have already a lot of data prapared for a data update (based on your requests and some own additions) which would be ready to be sent out. However, I would like to send it out along with the next App update. This App update contains – like always – some great enhancements and new Tools.

As you know, Apple has sent out Beta versions of iOS 7. The good news is, that the current version of Electronic Toolbox already runs on iOS 7 without problems.

On the other hand, I like to implement some changes for the next update so that Electronic Toolbox can benefit from iOS 7 and so it can also be officially maked as iOS 7 compatible. I am corrently working on that but have to wait releasing this update until iOS 7 has been officially released by Apple, which should not take too long anymore.

Please be assured that I will keep backward compatibility as best as possible even though this takes often much more development effort than beeing forward compatible.

So far, it looks as I can keep Electronic Toolbox running from iOS 5 up to iOS 7.

I will keep you updated,

Kind regards,


App News - General News about my Apps Electronic Toolbox News

New data update for Electronic Toolbox

A new data update 1.26 is available for Electronic Toolbox

I just finished a small data update with some corrections and additions in the Glossary, the Arduino Tool, Pinout- and IC- Databases. Also, some translations and Texts have been updated.

Among other things, Arduino Code Snippets have been added to the Arduino tool.

If you have some own Code Snippets that might be useful for other users, please feel free to send them in so I can add them too.

Some other requests from your side (Thanks for your comments and suggestions at this point) require an App Update and can’t be updated with this data update so please be patient.

I am currently working on exciting new things for Electronic Toolbox and RF Toolbox so stay tuned.

Thanks again for all your mails and support.

Kind regards,


App News - General News about my Apps Electronic Toolbox News

Electronic Toolbox 6.01.01 released

A new app update is available for Electronic Toolbox

Finally the new update is available. It took quite some time but finally it’s there.

The update contains the following new tools, you will hopefully like:

  • A Wire ampacity or Cable length calculation tool
  • A Delta / Star calculation tool
  • ARM Cortex controller database
  • ARDUINO Tool with datasheets, diagrams, images, language reference etc.

In addition, the following improvements have been implemented:

  • Documents such as data sheets can now be opened and viewed in any other app on your device even in iBooks
  • Decibel values can now even be entered with negative values when the special keyboard is switched on
  • Resistor 1 of the LMxxx regulator in the Voltage regulator tool can now be modified (again)
  • More accuracy (digits after the decimal point) for the Measurements tool
  • Diameters can now also be entered in AWG (e.g. in the Wire ampacity tool)

Like always, if you find an issue, have a new idea or if you are missing something, just let me know. Please just use the support button in my app or the support button on the app store.

As usual, I am already working on the next version.

If you like to support me, please don’t forget to write or update your review as it is only valid for the current version.

Thanks again for all your mails and support.

Kind regards,


App News - General News about my Apps Electronic Toolbox News RF-Toolbox News

Update 6.00.06 is out for Electronic Toolbox and RF Toolbox

A new app update is available for both apps

This update contains the following changes:

  • For non-retina devices, there is now a new “small” Icon setting which is different to the “standard” which gives you back the Icon size as before if you prefer this size.
  • A more consistent and correct usage of the “mils” unit
  • Some corrections and changes for 3-Band resistors
  • Some corrections in the OpAmp tool, especially for the inverting and differential OpAmp calculations
  • Some corrections in the Attenuator calculator
  • Now, for iOS 4 devices, the “special keyboard” will be disabled automatically as this is not possible with iOS 4
  • Faster data update download
  • A new tool for SWG (Standard Wire Gauge)
  • And finally, EIA-96 coding support in the SMD resistor tool

Those changes apply to Electronic Toolbox as well as to RF Toolbox.

I am currently already working on some more change requests you sent me and also on some new tools that are hopefully about to come soon.

Thanks again for all your mails and support.

Kind regards,



I am still receiving questions from people wondering about the changes in Version 6. You can find more information here : Version 6 changes

Information about Electronic Toolbox can be found here: Electronic Toolbox Home

And Information about RF Toolbox can be found here: RF Toolbox Home

App News - General News about my Apps Electronic Toolbox News RF-Toolbox News

New Data update for Electronic Toolbox and RF Toolbox

A new data update V 1.24 is available for both apps

A new Data update 1.24 is available for Electronic Toolbox and RF-Toolbox which contains the following changes:

  • Corrected resistance per feet dimension in the AWG tool
  • Corrected formula for the RLC parallel and series tool
  • New sockets: Tascam, Yamaha/Apogee
  • Corrected circuit diagram for the differential OpAmp
  • and some other minor changes

Electronic Toolbox also receives new Translations for Portuguese and Italian. Many thanks goes to Rui from Portugal and OM massimo from Italy for their fantastic translations. Thank you so much.

During the last days, I already sent a new app update 6.00.06 to apple which contains some more changes and additions that required an app update.

Thanks again for your support, your help and submitting your findings.

Kind regards,


App News - General News about my Apps Electronic Toolbox News RF-Toolbox News

RF-Toolbox released and Electronic Toolbox app AND data update available

RF-Toolbox available

News for today:

  • RF-Toolbox has been released
  • A new App update V 6.00.05 for Electronic Toolbox is available
  • And finally there is a data update for Electronic Toolbox available

First regarding RF-Toolbox:

This new app is specialized on high frequency electronics for RF professionals, radio amateurs and students. RF-Toolbox is based on my Electronic Toolbox, contains some of the common tools from Electronic Toolbox but contains a wide range of additional tools, specialized for high frequency electronics, RF professionals, radio amateurs and students.

Just checkout the features and screenshots on my website: creating-your-app/rf-toolbox or the AppStore :

New app and data update for Electronic Toolbox:

The data update V 1.23 comes along with a new app update V 6.00.05 so please check out the AppStore for an app update as well as pressing “Check for update now” inside the app (settings screen) to get the latest data update. The order of these updates doesn’t matter.

The data update includes new ICs as requested such as the MCP3204, the MCP3208 and the MAX7219. It also contains some more units for the measurements tool as well of some corrections (e.g. the OBD II socket).

The app update V 6.00.05 contains basically some corrections for the NE555 tool, where it was not possible to calculate based on a given time or frequency. Now, it is possible to enter either the time or frequency as unit in order to perform the desired calculation.

Also, the RLC tool has been revised so that either RL, RC, LC and RLC impedances can be calculated either in series and parallel circuits.
Finally, some information texts have been added to some tools.

Thanks again and kind regards,




App News - General News about my Apps Electronic Toolbox News

Electronic Toolbox 6 available

Electronic Toolbox news

First of all Happy New Year to everybody!

Good news though! Finally Electronic Toolbox 6 is available on the app store and can be updated for free.

The new version contains several improvements and extensions. Here is an excerpt of most of the changes:

  • 4″ Retina and iPad Mini support.
  • iOS 6 support but still compatible starting from iOS 4.3 and runs on all devices from iPod-Touch, iPhone and iPad devices that run at least iOS 4.3.
  • Global Search across all tools and databases.
  • New special keyboards for faster hexadecimal and numeric entries.
  • New option to add the calculation result screen to a project.
  • New option to print the calculation results.
  • New setting for switching between metric or imperial units.
  • Especially for the US, possibility to switch off the use of ‘U’ for Voltage in the settings.
  • Support for E-Series standard values across the whole app for resistors, capacitors and inductors.
  • Rearranged and simplified settings screen.
  • Indication whether a PDF has or has nor already been downloaded.
  • Better optimization of fonts, formulas and images especially for the iPad.
  • The Measurements tool has been completely rewritten.
  • New Tool: SMD Resistore Code.
  • New Tool: Inductor Code.
  • New Tool: Formulas for quick search for individual formulas.
  • New Tool: Bridge Rectifier.
  • New Tool: Toroid Winding.
  • New Tool: Transformer.
  • New Table: Physical Constants.
  • The Voltage regulator Tool now also supports the LM350.
  • The LED-Tool now also calculates the resistor power.
  • The Filter Tool now also supports Band-Stop filters.
  • Improvements of the tools NE555, Reactance, Filter and OpAmp.
  • Optimized and nicer Icon display.
  • Improved data update mechanism.
  • Some error corrections.

Please note that this version now requires at least iOS 4.3. Please do not install if you are using an older iOS version.

Detail information and information on how to use these new features can be found here on

Finally a big big thank you for your suggestions and support. You helped me and the other users to continuously keep up my work on my app.

Please stay tuned as I am already working on the next version.

If you like this update, please continue to support me be writing or updating your app store review a review is just visible for the current version.

If you find an error or something that is missing or can be improved, please let me know via E-Mail as I can’t respond to app store reviews.

Thanks again and kind regards,




App News - General News about my Apps Electronic Toolbox News

New Electronic Toolbox data update 1.21 – new Version 6 – Merry Christmas

Electronic Toolbox news

Dear Users of Electronic Toolbox.

First of all, many thanks for your kind support, your suggestions, requests and your kind AppStore reviews which all have helped to continuously improve my app.
Many of your suggestions have already been implemented for the next version 6 of the app.

Regarding the next version, I have good and bad news.

Let’s start with the bad news. Apple is closing down for the holidays over Christmas. This doesn’t mean that my app won’t work or cannot be purchased anymore but I cannot release an update during their holidays.

The good news is however, that Apple has finally released Version 6 today. This means, that I will make it available to the app store right on January 2nd and like always, for free for all existing users.

As mentioned before, this version doesn’t contain so many more tools but many changes under the hood and changes that affected almost all existing tools such as the support for E-Series values or the global search function. Version 6 will, of course, support the new 4” retina display and iOS 6. As there were much rumors about my app being or not-being compatible to older iOS version, I can again confirm that it will run on iOS 4.3, 5.x and 6 and will run on all devices which can run at least iOS 4.3 (for further reading, just head to my blog :

I will announce the details of the changes and additions along with the release of version 6.

Today’s Electronic Toolbox data update only contains a few more tables for the tables tool, some corrections and some more information texts for the existing tools.

As usual, I am already working on the next version (even though the new version has not been released). My to-do list with my own ideas and your suggestions is still quite long so there is still much to do.

I have also some exciting ideas and already talked to a very interesting company who will be able to support my app in many respects. So I am sure, 2013 is going to be an exciting year for Electronic Toolbox. So stay tuned…

I like to thank you again and wish you and your families a Merry Christmas and a Happy New Year.

Best regards,


App News - General News about my Apps Electronic Toolbox News

A new data update is available for Electronic Toolbox

A new data update V 1.20 is now available

This data update V 1.20 is basically a preparation for the next app Version 6 of Electronic Toolbox.

However, it also contains some amendments and additions for the current version such as:

  • A new section “Physical constants” for the Tables tool
  • Some amendments for the AWG tool
  • Several Displays have been added to the ICs Tool and the Displays section such as the LKC-1602 16×2 Character LCD Display and others
  • The LM35has been added to the analog ICs section
  • The missing Serial ATA 15 Pin power plug has been added to the Sockets tool
  • The LM107has been added to the OpAmp ICs section
  • Some amendments to the Toroids database
  • A new section “Cable connections” has been added to the Sockets Tool for cables such as serial null-modem and spy cable layouts and some more
  • In addition, there were some text changes and minor data corrections.


Again, to all of you, many many thanks for all your support and you kind app store reviews and your encouraging E-Mails. This really helps me to keep up my work on my app.

I trust you will like the next app version 6 which will basically add several enhancements that you have been asking for. I hope it will be released soon.

Thanks again and kind regards,


App News - General News about my Apps Electronic Toolbox News

Electronic Toolbox version 6 announcement

Version 6 development status update

Just to keep you updated as you might be wondering about the availability of the next update.

I am currently working hard on the next update but it took me a bit longer than expected but mainly because I decided to add a few things that required some changes in all areas of the app.

First of all, the new version will contain a global search mechanism. With this feature, you will be able to search for e.g. “0402” and will get results for diodes of the type 0402 as well as the SMD code 0402. Or if you search for “Ethernet” you will get all Ethernet socket types or the Ethernet conversion rates. It is also possible to quickly find specific conversions or content that is hidden in the table tool. This search function replaces the search bar in the tool list view and is now also available for the tool icon view.

As many users already asked for such a global search function and as there are now almost 50 tools included in my app which sometimes makes it difficult to find a certain calculation or database, I found it’s about time to add such a global search function. As you can imagine, this required a lot of changes throughout the whole app.

The same is the case for the changes for iOS 6 and the new iPhone 5. I was able to replace several functions that are no longer necessary as they are now included in iOS 6. This speeds up the app in many areas. Especially the “check-for-update” function benefits from this quite enormous. It also resulted in many minor tweaks and improvements. However, most of them are only available on iOS 6.

But most importantly, I was able to keep the app backward compatible back to iOS 4.3 and back to the iPhone 3GS. (However, I would not recommend running the app on a 3GS as my app runs too slow on those devices). Also, I have only one Test Device for iOS 4.3 available and only three test users (if still available). iOS 6 is now the preferred iOS for my app as the app can then take advantage of the new features. Even if you say you don’t use any of the features that have been introduced by iOS 6, the app will run better and faster on iOS 6.

The survey also speaks a clear voice (Thank you all for participating). Most of the users have updated to iOS 6. For the few users still working with a previous iOS version after and including 4.3, the app will still run on your device but I would recommend updating as mentioned before.

For the few devices that run older iOS versions (prior to 4.3) and for those with an iPhone 3G, I am not able to provide updates anymore. Again, this is not because I am not willing (I would if I could) but because Apple discontinued supporting the armv6 CPU. I have no chance to send an update to apple that still supports this CPU.

I have now still some work to do with the next update as I wanted to complete the implementation of a few changes and additions but most of the work, especially most of the heavy work, has been done.

So please stay tuned and many thanks again for your great support!

Kind regards,



App News - General News about my Apps Electronic Toolbox News

iOS 6 and iPhone 5 support for Electronic Toolbox

As I am currently working on the next update for Electronic Toolbox pro, I would like to add and use some features of the upcoming iOS 6 and I also like to support the new larger screen of the iPhone 5.

In order to do so, I may have to drop backward compatibility.

Please help to understand you better for my decision by using the survey on the following page:


Thank you in advance.



App News - General News about my Apps Electronic Toolbox News

Electronic Toolbox Dataupdate 1.16

A new data update V 1.16 is available

This new data update includes the following changes:

  • SI-Unitsadded to tables
  • SMD Metric and Imperial Size codes(such as 0402,0805 etc) added
  • About 60 different Toroid types added including specification and Al value (Soon, there will also be a separate tool to calculate coils with Toroids)
  • Glossarywas updated
  • Displayport and Mini-DisplayportSocket added
  • Thunderboldadded
  • 28 Fiber Adapters and Connectors with their specifications added
  • Some translations corrected
  • Some wrong terms corrected

I have some more data available to update but that requires the new app version I am currently working on. Hopefully I will get my iPhone 5 next week so I can perform final tests with the new app version. It is already working on the simulator but I like to perform a physical test.


If you have difficulties to update (either the app on the app store or the data update from inside the app), please contact me. I promise to help as there is no reason why one of those updates should not work. I can’t repeat often enough, if you just write a review, I can’t help.



As it was complained that my app contains too many European traits, I would love to know where this is the case. I tried my best to create an international app but my main focus is and will be the US. So if there is something contained that is not feasible for the US, please somebody let me know and I promise to change that.


Thanks again for your support.

Kind regards, Marcus