I have built a model train control system based on an Arduino Mega that uses an ID20 RFID reader to identify trains. The connection to the ID20 is very simple - 5V, GND, serial data. It has worked well with a read range of several inches for several years. Now something very strange has happened. I…

Very weird - touchscreen monitor on laptop kills RFID range on Arduino

Grumpy_Mike April 5, 2011, 10:54am 13

Good, but I bet you could have got away without the opto isoltor.

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