A very simple, but useful PCB. A power supply for the Muffsy Relay Input Selector (or anything else that can be powered by 5V DC/1A):
While there are lots of quality kits for preamplifiers, I have never really found a decent way of adding more inputs to a preamp. The existing ones are either of dubious quality, spec'ed like a spaceship, or both.
So I decided to make my own input selector. With relays. And an ESP-32 module! A year,...
I'd really like a stereo input selector with relays, but those things are hard to find! (Apart from some of dubious quality on the *Bay)
Better make my own then. This one's got a custom footprint for an ESP32 devkit module, but it can also be controlled with a rotary switch.
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