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