Modified Hello Echo – Part I: Hello Echo + Button + FTDI
Modified Echo Version 1 – Complete But Broken
This version milled out a bit hairy. Some of the traces were broken, so I used jumpers to re-connect them.
There must have been a short somewhere – after stuffing it, setting the fuses and flashing it, I plugged it in to a 9v battery and received a puff of smoke for my efforts. The LED went on – then smoke came out.
In addition, I placed the button too close to the programming header, making it hard to press the button. I am not including the Eagle board or schematic here – see version 2 for a better board.
Back to Eagle!!! See version 2 for a (hopefully) improved and working board).