SuperSimpleMultiSwitch

This module realizes a so-called "MultiSwitch": it can switch on/off up to 16 consumer e.g. LEDs, brushed DC-motors, ...

This module is controlled via a RC-transmitter/receiver. The module is connected to the receiver via a (bidirectional) serial CRSF connection. Typically the transmitter runs EdgeTx and the transmitters RF-module runs ExpressLRS, so the receiver also runs ExpressLRS. But in other usage scenarios also TBS Crossfire maybe used.

On the handset/transmitter a LUA-widget with touch-buttons, momentary-buttons, check-boxes is normally used as an UI to this module.

The exist other - more sophisticated - "MultiSwitch" modules (e.g. using STM32 µC). But this one is simple (AVR-DA µC) and eays to reproduce. If one likes the module can be built without this PCB but using a breadboard or similar.