My understanding, all USB ports provide 5v. I am trying to get voltage from TV USB port to power an input switch relay box (would turn on when TV turns on from standby and starts powering the USB ...
This is a simple update to Mr. Hareendran’s PIR Sensor Security Light circuit. It has a shortcoming limits the relay voltage to approximately 3.3V. While this may function with some 5V relays, it will ...
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