Hello ladies and gentleman, i looking for an answer of my problem. I want to control a Nec Beamer with a Arduino – Power On / Off. So i bought a RS232 to TTL Converter at Amazon and connected it with my Arduino. But it seems that it doesn't works. I don't know why. I tested it with a USB-RS232-Ada…

Problem: Arduino Uno + Ultra Compact RS232 to TTL Converter -> Projector-Control

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