Hi guys, I'm working on a program to test turnout motors for model railroads. The Arduino controls these motors via relays and receives feedback via photocouplers. I use Serial.print() to keep track of the number of succesful operations. However, This connection is often interrupted and won't star…

Arduino Uno: Problems with Serial.print()

holmes4 April 13, 2014, 7:55pm 11

The power comes from my computer via USB.

Yes you (at best) 500mA for every thing (Uno included). Try disconnecting the transistors from the uno and then run the code.

Mark

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