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Topic: Using external power and USB with Arduino Pro Mini 3.3V  (Read 141 times) previous topic - next topic


I have a Arduino 3.3V 8MHz and it is connected to my computer via TTL lead and all is working fine.

I want to power project externally using battery connected to RAW pin - but I also want to use the USB TTL lead for receiving data on serial monitor.

I have used Teensy boards before and to do this  this there is a trace to cut on board (so the Arduino not getting power from the computer USB.) Is there a simple way of doing this on a Pro Mini?
Grateful for any advice.



You can carefully slice open the outer insulation on a USB cable and cut a section out of the power wire to create a "data only" cable.


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