So much wiring to do! This is a sidecar for the feedback resonator guitar thing which holds the battery and power supply, the amplifier, and an esp32 to send the buttons and switches and etc over wifi. One of the knobs (in blue) is the amplifier gain, and the four grey ones in line next to it are passive attenuation for the pickups. There’s also a knob going to the one ADC on the microcontroller, and an LED for feedback from it. I used this silly key-lock switch for the power because it seemed fun. How long until I lose the key just before a show? Storing the extra one inside the sidecar itself for that likely future happening seems like a reasonable idea. :-p
The side panel will have mute switches for the pickups, too, these red switches feel really nice to toggle. The power supply breaks out for charging on the side, and this is where the pickup audio, power and speaker hookups go too.