USB Cable Tester

davedarko wanted an easy way to check a USB cable, so he created this project on

USB cable tester


Test your mini, micro and A-A cables with this little device!


A little ATtiny45, some LEDs and transistors – battery powered. It scans through the cable with some blinking LEDs, then goes to sleep.


The design files and source code are shared on GitHub:



And the board is a shared project on OSH Park:

USB cable tester


Order from OSH Park

USB Cable Tester

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