Electronics Engineer Helper

Digital toolbox for electronics engineers and electricians

Calculators and references for beginners and professionals interested in electrical and electronics engineering, DIY and repair.

Tens of free tools, no sign up required

For all skill levels

Praised by thousands of users

Continuously updated since 2014

App UI screenshot when running on iOS App UI screenshot when running on Android
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★ 4.86

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Reviews from engineers

It seems like every time I click into this app I find a new feature that I didn't know was available previously. This app will definitely help everyone from a novice to expert in some way or another.

Amazing collection of tools, pin outs, data sheets search and others source with exactly images how look like the components, great job!!! Fully recommend!!!

Great app very useful save loads of time working on electronic

Quick and easy, my go to info source.

This is a good app as to do my work a little bit easier. Thanks!!!

Very useful and helpful. Showed the amperage for the gauge of the wire.

Quick, very user friendly, gives us complete reference profiles for rapid theoretical testing. This is now one of our main go to’s for active crossover testing.

Some of our popular tools

Schematic Symbols

Browse standard electronic schematic symbols

LED Resistor Calculator

Find the right resistor for any LED string

Datasheets Search

Quickly find component datasheets without visiting multiple websites

Resistor Color Codes

Decode resistor values from color marking (4, 5 and 6 bands)

Pinouts Guide

Reference pinouts for common interfaces and boards

SMD Resistor Code

Decode SMD component markings without difficulty

Ohm's Law Calculator

Accurate calculation of voltage, current, resistance and power

Voltage Divider

Convenient tool to design voltage divider circuits

Capacitor Markings

Decypher and convert capacitor markings

More than 50 tools overall

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Download from Google Play