I have a charger which powers my arduino. On the charger is an LED which indicates these states: 1 - solid light (powers on) 2 - flashing on and off at 1 second intervals (low battery) 3 - off When the led lit it always PWM at 1khz. I'm trying to sense this led with an input to my arduino to mon…

Detecting varying PWM states

anon35827816 September 20, 2021, 6:36am 12

Yeah, but in this case even a single MOSFET may do.

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