I’m in over my head and thought this was the place to start. I’m trying to replicate THIS project and can’t figure out the power supply. The wires coming from the furnace and AC is 26.8 volts A/C and I want to drop this to 5V DC. The current is too low to use as a reliable power source so I am going to use the Adafruit 500 Charger with a 500mA 5V Lipo battery. Can anyone point me to a good solution to something that would fit in the housing? I can’t figure out what they did.
Thanks a lot in advance. I’m definitely a novice.