Thank you for your design....it works great. I was able to filter out the noise on the VCC line. This noise came from my Cloudbit and caused my speaker to pop and hiss quite a bit. In addition to the proto bit I used the following parts for the filter:
- RES 100 OHM 1/8W 1% AXIAL (RNF18FTD100RCT-ND)
- CAP ALUM 220UF 50V 20% RADIAL (P5183-ND)
...which I got from Digikey.com.
Now the doorbell on my main house is connected to my garden room office.with the following set-up.
main house door bell
existing plain old door bell > small light bulb
....in an enclosed dark container with...
USB power > light sensor > Cloudbit
garden room office
USB power > Cloudbit > Long LED light > MIDI player > low pass filter > speaker
The two Cloudbits are connected via IFTTT.