Situation
I'm looking to add Raspberry Pi 3 near my door and detect when the doorbell is pressed. But I don't want it to change the operation of the chime (if Pi is off/unplugged, the chime should still work). I don't want to put something next to the chime because all of my connections/electronics are near the doorbell button itself.
I saw this question and that diode rectifier looked interesting.
This is the circuit I'm thinking of 
I read that the Opto-Isolator wears out 50% in 5 years, so in series it would only be on when pressed, as opposed to reverse logic and using the NC side of the button.
Can I put that rectifier in series with my chime?
R1,R2 are power resistors
Answer
So it turns out that I happened upon a switch that is perfect for this situation!
https://www.adafruit.com/product/3423
The product description says that
There are two electrically separate SPST switches inside the button.
and
The switch and LED are electrically separated,
No comments:
Post a Comment