I'm looking for some help building a circuit to supply a Raspberry Pi Zero, as well as a 1W RGB LED driven through a Picobuck driver. The Picobuck needs 12V and the Pi Zero just needs 5V (from a USB power).
I tried using a 12V to 5V buck converter board, connecting the 12V to the Picobuck and the 5V to the Pi. This is fine until I switch on the LED, which causes the Pi to either reboot or shutdown. I presume there is a voltage drop, or not enough current to keep the Pi running stable?
So right now my project has 2 wall adapters (one USB AC->5V DC, and one AC->12V DC). The project is working well! But I want to eliminate the second power supply.
What do I need / what is a good circuit option to have a single AC power source, and then 2 outputs -> 12V and 5V without a current draw from the 12V causing a ripple or voltage drop on the 5V?
Is there such a circuit design? I can build something if its not too complicated, but I am still a beginner and wouldn't know where to start designing a circuit like this. Preferably I would like to just use my existing AC wall adapter that outputs 12V @ 1A. Is this enough power?