Turn your RC radio into a controller for your PC.

The default channel map aims at being usefull for 6 channel radios while exposing as much functionality as possible.

These are the function settins on my Futaba T16IZ. I ran out of switches for channels 15 and 16.

The circuit can be powered by the PICO VBUS and 3V3(out) pins when plugged in USB.

Futaba servo connector: | - + D |_

• SBUS + = 5v (VBus from PICO pin 40)
• SBUS - = GND (from pico PIN 3, 8, 13, 18, 23, 28 or 38)
• SBUS Data = Inverter input (CD74HCT14E pin 1)

• 1 = SBUS Data
• 2 = Inverted SBUS Data - Level Shifter Signal High side
• 7 = GND (from pico PIN 3, 8, 13, 18, 23, 28 or 38)
• 14 = 5v (VBus from PICO pin 40)

• HV1 = Inverted SBUS Data
• LV1 = Low level Inverted SBUS Data
• HV = 5v (VBus from PICO pin 40)
• LV = 3.3v (3V3(out) from PICO pin 36))
• GND = GND (from PICO PIN 3, 8, 13, 18, 23, 28 or 38)

• GP5 (pin7) = LV1 (3.3v low level inverted SBUS data)
• VBUS (pin40) = 5V
• 3v3(out) (pin 36)= 3.3v
• USB = Your PC :)

SBUS functionality inspired by https://github.com/fdivitto/sbus and https://github.com/BrushlessPower/SBUS2-Telemetry

We use UART1 and GPIO5 as RX pin.

You will need both a logic level converter to change the RX voltage to 3.3v and a logic inverter.

A Sparkfun logic level converter should work: https://www.sparkfun.com/products/12009

Signal coming from the receiver needs needs to be inverted. You can use a 7400 inverter like CD74HCT14E or a transistor based NOT gate as described here https://www.electronics-tutorials.ws/logic/logic_4.html