This is a separate from another thread I have on this device:
https://cdn-learn.adafruit.com/downloads/pdf/adafruit-audio-fx-sound-board.pdf
It takes up to 5v inputs to trigger the pins for sound--3.3V preferred. One lead of your trigger hits the pin; the other connects to the board's ground.
The house doorbell would make a good trigger, but it's around 20VAC (I've not tested it but I see the transformer back in the wall).
The thought was: a rectifier and then step down the DC to 3.3v, on the input leg from the doorbell to the board.
Would a half-wave rectifier be sufficient for this or a full wave? I ask because it only need 125ms of trigger time on the board to activate a pin.
https://cdn-learn.adafruit.com/downloads/pdf/adafruit-audio-fx-sound-board.pdf
It takes up to 5v inputs to trigger the pins for sound--3.3V preferred. One lead of your trigger hits the pin; the other connects to the board's ground.
The house doorbell would make a good trigger, but it's around 20VAC (I've not tested it but I see the transformer back in the wall).
The thought was: a rectifier and then step down the DC to 3.3v, on the input leg from the doorbell to the board.
Would a half-wave rectifier be sufficient for this or a full wave? I ask because it only need 125ms of trigger time on the board to activate a pin.