Neues Datenupdate 9.02

Ein neues Datenupdate 9.02 für Elektronik Toolbox und RF-Toolbox ist verfügbar

Dieses Update enthält folgende Änderungen und Ergänzungen:

  • Weitere Coax Kabeltypen
  • Mini DIN Stecker
  • Amateurfunk Steckerbelegungen
  • Flugfunk Geräte Steckerbelegungen
  • Weitere Daten und Informationen für das Gehäuse Tool
  • Im Röhren Tool waren einige Pinbelegungen verschwunden. Sorry. Diese sind nun wieder vorhanden
  • Einige weitere Anpassungen und Korrekturen in weiteren Datenbanken

Ein neues App Update ist auch schon fertig allerdings warte ich mit der Freigabe noch bis Anfang des Jahres. Ich fand es zu risikoreich, dieses Update jetzt schon zu verteilen weil es wieder einmal ein recht großes Update ist. Hintergrund ist, dass Apple die Tore für Entwickler vom 21. bis 29. Dezember schließt. Ich könnte also kein Update mehr an Apple schicken, wenn das notwendig werden würde.

Das App Update kommt dann aber gleich Anfang Januar.

In der Zwischenzeit möchte ich mich noch einmal für die tolle Unterstützung bedanken und wünsche allen Anwendern und Familien frohe Weihnachten und alles Gute für 2016!

Viele Grüße,

Marcus Roskosch

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.

    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!



    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,

    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.

    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.

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

    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).

    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.

    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.

    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:

    • 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.

    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,


    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.

    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,



    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,


    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,


    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,