Hello. I need a sensor that can sense the green status led on an audio amplifier and report state via MQTT. The goal is an accurate source of Power State (ON/OFF) for the audio amp. The light is a fairly dim led. The sensor could mount directly on it. Is the LM393 appropriate for this type of requirement?
Here is the problem... Home theater setup. TV and sound app both start at the same time. However, the audio amp has a "feature" where it cuts it's power off if it doesn't sense audio for more than two minutes. As soon as you mute the TV for an advertisement, the audio amp shuts down (while the remote control thinks the audio amps state is ON). Then, everything is out of sync and my wife and kids start calling me names. Bad ones.
