I’ve built a small keypad with the Sparkfun AtTiny85, and would like to connect it with a cable.
When I plug it in normally, it behaves as expected and works great, but when connecting with a USB cable, it gets some usb error…
Tried connected it to the USB pins on the board, and to the USB "tongue" directly. nothing worked.
What is the correct way to do it?
thanks in advance:)