USB BreakIn Board

Small board to insert power into an USB Slave.

This board is designed to test USB devices without expensive USB Isolators. When testing USB Powered devices you have to make sure your device uses less than 100 mA unless otherwise asked from the host, but not with this board.

Simply remove 5V jumper from the HOST side and plug in your lab supply!


  • Don't smoke out your USB port anymore.
  • Don't throw your USB hub into error mode anymore.
  • USB 2.0 
  • Inexpensive


  • Doesn't create an isolated USB port

Bill Of Materials:

Total bom cost approx €10 with shippings.


Download Eagle Files

Untested design!