@barafael

A PCB module with stm32f411 "Black Pill" and hc-12 that can serve as basic hobby RC-like sender or receiver.

simple light blinker for remote controlled aircraft (supports landing lights and standby mode set by flap and throttle channel)

Round PCB for dizzy little gyro on frisbee + WS2812 controlled by an Adafruit ItsyBitsy M4