This update includes the following changes and fixes: ◉ Further improvements for a next iOS Version ◉ Some bug fixes and improvements ◉ Several changes under the hood Thanks for your great support and feedback which helps to further improve this App. Please use the Contact Developer feature inside the App to contact me in case of questions or issues. Stay safe and healthy! Best regards, Marcus

This update fixes a few remaining minor issues. Best regards, Marcus

This update fixes a remaining iOS 14 bug where some images were not displayed correctly. Best regards, Marcus

This update includes the following changes: ◉ Further iOS 14 improvements ◉ For the calculation Tools, it is now possible to save calculations under a name and reload them later ◉ Many changes in the Make section. ◉ Fixes in the Voltage Regulator and constant Current Tools ◉ Small changes in the Active Filter calculation Tool ◉ In the SamacSys Component search Tool, you can now Bookmark components for later reference from the Bookmarks Tool Please: If you like my App, please write a review or, in case of problems or suggestions, please use the Support button under Settings inside the App. Thanks for your fantastic feedback which helped to continuously improve this App. Stay safe and healthy! Best regards, Marcus

This update contains several changes and improvements: ■ Additional iOS 13 compatibility - a new File and PDF Viewer has been implemented - iOS 13 page sheets are now supported - and several additional changes to support iOS 13 have been implemented - The minimal iOS Version requirement is now 10 ■ Bug fixes - Bug fixes in the C-Plate tool - Bug fix of the Components tool which could only opened once - Due to the new PDF Reader, data-sheets will now rotate correctly - Printing from inside the Database tools (e.g. Transistors) no work correctly - A bug which prevents to import Online projects was fixed (basically an iOS 13 bug) ■ SamacSys tool I found that this tool often was underestimated. It is indeed a very powerful tool to find information like specs, data sheet and pin out of literally any component. The tool is now called Comp. Search to better suit to it's purpose. I have also implemented some improvements to this tool. ■ Attenuator tool This tool now also calculates backwards based on the selected E-Series ■ Tables tool - 3D Printing Filament types added - Power over Ethernet POW Classes added ■ Circuits diagrams One of the larger improvements is the use of the internal Circuit drawing feature for the tool diagrams. This way, the circuits (e.g. for the OpAmp Tool) benefit from the following improvements: - Improved drawing quality - Resistors will now either be displayed in Zig-Zag US or IEEE Style (depending on the country setting) - Where possible, the circuits now show the calculated component values inside the diagram - All tools now offer Printing and PDF Exporting which also includes the circuit diagram ■ Circuit Editor - New Setting: "Adjust board to fit" under (File -> Parameters) allows to change the board size to fit the whole circuit so you don't have to move components around if the board is too small. - Circuits can now also be printed ■ Improved File Viewer, Print and export capabilities Either from inside the tools or from inside the File Viewer, content like the Tool results can now be exported as PDF as local file or printed ■ Other improvements - A new Tool SMPS for calculating Flyback Transformers for Switched Mode Power Supplies as been added - Several images have been re-created in higher quality - The Formula tool has also been improved In case of questions, issues or suggestions, please use the Support button inside the App of the Form on the website. Thank you so much for your support. Please let others know if you like this App to keep it going. Thank you so much! Best Regards, Marcus

This update adds some new tools and improvements: ■ Stock / Inventory The Make section now contains a new Stock / Inventory tool which can be used to maintain your local component Inventory. ■ SamacSys / ECAD Models I am very proud to announce the new ECAD Models Tool which is powered by SamacSys. SamacSys is leader in providing Schematic Symbols, PCB Footprint and 3D models for almost any available component. You can now use the ECAD Models Tool whenever you are looking for Details, including Datasheet or Pinout for any component. ■ Source Code for Projects You can now even add and edit the Source-Code files for your projects. ■ New Two-Tone Tool Even though not just dealing with plain Two Tones, this new Tool allows to generate audio codes of a variety of different standards like CTCSS, DTMF, SelCall etc. There are already 11 different Standards supported. Let me know if you need more. I am happy to add them via Data Update. ■ Other changes As usual, some additional minor requests have been implemented and some bugs were fixed. Thank you so much for your support. Please let others know if you like this App to keep it going. Thank you so much! Best Regards, Marcus

This version adds multi-directional calculation in the three RLC Calculation tools. You can now calculate regardless which R,L,C or Fr values are given or should be calculated. This version now allows component Synchronization of multiple Circuits in a Project. Also, Synchronization now happens automatically and seamlessly in the background. iCloud Drive support has been improved. A bug, causing duplicate file names has been fixed. The Circuit Editor now supports US Symbol Style (e.g. ZigZag Resistor) which can be enabled in the Board settings. Finally, a new universal IC Symbol allows to draw ANY possible Chip variant with any number of Pins and Pin names. This update is also a preparation for Electronic Project Editor for Windows which is fully compatible with this iOS Version. Electronic Project Editor for Windows is available on the Windows Store. Further details can be found on my website. Thanks for your great support and fantastic reviews! Best regards, Marcus

This update contains a few minor adjustments for the new iPhone models and iOS 12. Also, a few minor bugs were fixed. Best regards, Marcus

This update fixes a bug which caused the App to crash when saving Circuits in the Circuit Editor. Sorry for this bug.

This Update is a new Major Release including the following changes, improvements and enhancements: ■ Missing Image (e.g. DB9 Female to RJ45 in Sockets -> Cable connections) fixed ■ Wrong color assignment (e.g. in Tables -> Cable Colors -> Fiber Optic Cable) fixed. ■ In Circuit Editor, using the Trashcan Icon to delete files is now working ■ New Colors Tool (for Color conversion between different standards) I really appreciate your help and enthusiasm supporting me and my App. Thank you so much! Best Regards, Marcus

This Update contains the following fixes and improvements: ■ Improved behavior in slow network conditions while checking for updates ■ Support for the new iOS 11 File Sharer for Circuit Diagrams ■ Improvements for the iPhone X ■ New setting for even smaller Icons ■ Improved Circuit Editor ■ Corrections and additions to some component databases ■ Changes, necessary for iOS 11.3 More information can be found on my website electronic-toolbox.com. Thank you again for all your support, suggestion and positive criticism. Please let me know as soon as you can in case you may find a bug because I want to fix it. Thank you! Marcus

This version contains the following changes and improvements: ■ Formula bug fixed ■ iOS 11 adaptions ■ 3D-Viewer bug fixed ■ Sound Generator now allows to select output device ■ Projects can now be shared via Email ■ Improved integration of the Tools to the Projects ■ Added: 2-Digit SMD Codes ■ A 'real' Manual is now available (also available online at : http://go-to.me/etb-manual) ■ New: Now you can create and draw your own Circuit Diagrams (Beta) Thanks for your fantastic support! Marcus

This version contains new tools, many improvements under the hood and of course some bug fixes. New tools in RF-Toolbox: ■ Transmission line – To calculate R',L',C' and Z0 of Twin Line, Coax, Twinstrip and Microstrip transmissionlines ■ Wilkinson Splitter Tool Also: ■ The Packages tool has been further improved ■ Optimizations for the iPad Pro (both models) ■ Necessarily changes for iOS 9.3.x Thank you all for your great support! Please don't forget to rate this App. Thank you, Best regards, Marcus

This version contains new tools, many feature improvements and of course some bug fixes. New tools in RF-Toolbox: ■ Microstrip Mitre – This new tool allows optimal mitre calculations ■ PLL Loop filter – This new tool helps to design a PLL loop filter ■ Packages Database – This new tool contains more than 300 Package types like DIP, DIP, TO, SIP, SOT etc. The following new features have been implemented: ■ iOS 9 Electronic Toolbox and RF-Toolbox are now not only fully compatible with iOS 9 (while still backward compatible down to iOS 7), they also support new features introduced with iOS 9 such as: ■ Split view (use the App side by side with another App) ■ Multitasking (App will continue to run in Split view) ■ Improved user interface on iPhone 6 plus and 6s plus in landscape mode Additional improvements: ■ Now it is possible to directly jump to the compatible types listed inside the transistors, FETs etc. ■ You can now also directly jump to the 74xx and 40xx ICs from inside the Logic tool ■ The Battery charge tool can now also calculate discharge ■ Improved Database parametric filtering ■ Substrate Dielectric can now be selected (e.g. FRA4, GETEC, Polyimide etc.) in the PCB tools (RF-Toolbox only) ■ The voltage divider now also displays ratio between R1/R2 and V1/V2 ■ Generator, Scope and Frequency counter now allows input and output either on built in speaker / microphone or headphone plug ■ Upon request, the Frequency tool can now again convert between Period/Frequency/Wavelength ■ Tools like the Raspi tool now have “Useful links“ ■ The PV 4-20mA tool now shows sample values in 10% steps (linear and square root) Improvements in the Projects section: ■ Many additional components added ■ The component browser now allows to search for component types ■ Inside the project, you can now directly jump to the corresponding tool for a certain component. This way, you can now easily double check the pinouts, datasheets or color-code directly from inside the project tool Bug fixes: ■ The Battery plot function is now working again ■ Some corrections in the parametric filters ■ Some corrections in the calculation of the Toroid tool ■ Some general corrections in the transformer tool ■ Three ring m Ohm values are now accepted in the Resistors tool Please note, as mentioned in my blog on electronic-toolbox.com, there will soon be some additional updates. If you experience some issues or have additional requests or ideas, please let me know quickly so I can consider this for the next update. Thank you all for your great support! Please don't forget to rate this App. Thank you, Best regards, Marcus

The most important changes first: ■ 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 ■ New Tool: - New Wheatstone Bridge calculator - New Frequency counter tool - New Balun calculation tool 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 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 And of course, several bigger and smaller changes. My to-do list for RF-Toolbox is still long so stay tuned, there will be another update soon. 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 while having a quite long testing phase, there might be bugs in the app. Just let me know and I will fix it quickly. Promised! Thank you so much for your great support and suggestions. This has helped to Electronic- and RF-Toolbox to get the best app of its kind on the AppStore (that is, what some users said). Best regards, Marcus

This updated fixes the crash in the recently added Oscilloscope tool

This update fixes the following bugs: ■ Device rotation will now work correctly ■ German "Zurück" button fixed ■ Few issues with 3.5" iPhones fixed ■ Capacitor charge calculation fixed ■ Open image in other... app bug fixed ■ Duty cycle calculation in NE555 tool fixed ■ An issue that causeed 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: ■ Calculation results can now be transferred better to projects (no longer just screenshots) ■ Some speed improvements (e.g. esp. for iPad 2) ■ The Oscilloscope from Electronic Toolbox was also added to RF Toolbox LIKE ALWAYS, PLEASE NOTE: Don't forget to install the new data update as well Please don't forget to write or update your app reviews. Many Thanks! I am already working on the next update. Kind regards, Marcus

This update fixes those few minor bugs that have been reported after the release of my last major update. Since no more bugs have been reported, this version can be seen as stable release. Anyway, if you may find any issue or have any question, please don't hesitate to contact me either using the support form on my website or ideally by using the support button inside the app. Many thanks and kind regards, Marcus

This is a new major release and almost 70% of the code has been re-coded. Basically, this release changes many things under the hood, adds many general features you have asked for quite often and fixes many small or even larger bugs. Version 7 contains the following changes to the previous version: ■ UI Improvements For compatibility reasons, previously I did use some UI Elements such as the Picker control in its old design or the old Keyboard and did not offer some other iOS 7 features even though the app was already compatible to iOS 7. This new release takes now fully advantage of iOS 7 and is now even already compatible to the next iOS Version. However, for this reason I had to drop backward compatibility to iOS 5 and 6. So with this new release, you will now have all the new iOS 7 improvements such as swiping lists to the right, to jump back, new animations, popover selections, new view and icon designs etc. but you have to use iOS 7. If you don't want or can't update to iOS 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 but the functionality can no longer be enhanced. Amongst this, all tools have been revised to look and behave consistent. ■ 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 app customizations by using the Organizer 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 restore 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. ■ New and improved action button The action button now has a new icon and will now act as a real action button. It new always opens a popup menu with several options based on the current view. ■ New Grouped Tool view For those of you, who got lost in the numerous tools the app now provides there is a new grouping option available. By selecting this option, tools will now be grouped by individual Icons by - General Tools - Tools dealing with passive components - Tools dealing with active components - Conversion tools - Circuit tools - RF related tools ■ Bug fixes and minor improvements While working on each individual tool, I did also fix many bugs or added numerous improvements to several tools. As 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. Kind regards, Marcus ■■■■ PLEASE NOTE: Don't forget to install the latest data update after you update this app version ■■■■

A new update 6.09.01 has just been released. This update is mainly a maintenance update but it also contains two new tools: ■ 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. ■ Disable sleep mode Some users told me that they use my app in the lab all the day and leave their device 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. ■ Fixed a few bugs As usual, every update also fixes some bugs that slipped through for instance the missing Icon for the Combinations tool introduced with the last update. Many thanks for your feedback. To you and your families, have a Merry Christmas and all the best for 2014. Kind regards, Marcus

This update includes the following changes and additions: ■ 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. ■ 4-20mA conversion tool This new tool converts values based on the instrumentation systems 4-20mA DC standard. ■ Negative value entering fixed For some input fields it was not possible yet to enter negative values. Now, the special keyboard has received a minus sign in the top bar. ■ support for oz/ft² (Copper Plating Weight in oz) Especially for the PCB trace calculation, thickness can now 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 now remembers previously selected unit types and units. And as usual, there were many other minor changes and corrections. Some new tools are already under development. 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 app store. If you like to support me, please don't forget to write or update your review (the review button in tha app is now back working). Thanks again for all your mails and support. Kind regards, Marcus

■ Desktop Calculator added ■ New Newsreader ■ Few design changes so the App now looks consistent to iOS 7 ■ Improved selection of Data entry fields or result fields ■ Couple of minor improvements and corrections as suggested 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 app store. 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, Marcus

This update is not just a preparation for iOS 7 but also contains the following new tools: ■ Passive cooling calculator ■ PTC / NTC Temperature Resistance conversion ■ AC Ohms law tool ■ Zener diode circuit calculation ■ Constant current source tool ■ ASCII Table 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 Now, it is also possible to copy output results (regardless if this is text or a number) by long-tapping the value. Finally, as usual, many other things have been changed and corrected under the hood. 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 update now" 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 app store. 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, Marcus

This update contains the following new tools: - An Antenna calculation tool - An Active Filter calculation tool Also, two tools from Electronic Toolbox have been added: - A Wire ampacity or Cable length calculation tool - A Delta / Star calculation tool In addition, the following improvements have been implemented: - Diameters can now also be entered in AWG (e.g. in the skin depth calculation) - In the Crosstalk tool, rise time can now be entered in time or frequency - 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 in the Voltage regulator tool can now be modified (again) - More accuracy (digits after the decimal point) for the Measurements tool Please note, along with this update, also a data update has been released. Please don't forget to install the data update be using the "Check for update now" 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 app store. 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, Marcus

- Some small bug fixes - New small Icon size for non-retina devices - New SWG Tool - EIA-96 support in the SMD tool - Faster data update - Preparations for the next update which will add some more tools