I've modified my Teensy++2.0 to work with 3.3V by cutting the trace between the 5V pad and the VCC net on the back of the board. I also shorted the 3V pad to the center pad on the back.
When I apply 3.3V to the "5V" pin on the board, it seems to work well (I have it connected to an ethernet module, and it's transmitting packets just fine). I can also upload new code to it.
The problem is that I don't get serial communications over USB now. None of my Serial.print() statements are coming through on the serial monitor, and I can't send any commands. Is there anything else that needs to be done to be sure the serial port continues working?
Just as an fyi, I've also tried my current code on another Teensy that hasn't been modified for 3.3V, and it works fine there.
When I apply 3.3V to the "5V" pin on the board, it seems to work well (I have it connected to an ethernet module, and it's transmitting packets just fine). I can also upload new code to it.
The problem is that I don't get serial communications over USB now. None of my Serial.print() statements are coming through on the serial monitor, and I can't send any commands. Is there anything else that needs to be done to be sure the serial port continues working?
Just as an fyi, I've also tried my current code on another Teensy that hasn't been modified for 3.3V, and it works fine there.
