This is what happened. I received my Arduino Uno R3 in the mail. I followed the instructions perfectly and successfully loaded the blink sketch. I then installed the Parallax PIR Sensor and downloaded a sketch for it and it worked great! I got tired of it after a while and reconnected to my Windows …

Arduino UNO R3 Help Please

cmiyc September 1, 2012, 10:17pm 2

With nothing connected to the Arduino board, it does not appear as a COM port anymore?

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