The model aircraft remote control uses a single channel to realize the 8-mode circuit of selecting the flight control by button control.

The PCB was redrawn according to the schematic diagram. The 8 buttons control the voltage output, which can be understood as a potentiometer composed of 8 buttons. The following is the transplant content:

       Single channel realizes using button control to select 8 modes circuit + PCB + firmware (20201012) The circuit is relatively simple, so let’s briefly explain it!

First, let’s look at the schematic diagram. VCC GND is the power supply voltage of the power interface, please be the same as the power supply voltage of the microcontroller on the remote control!

OUT is the voltage output, the output voltage is 0-VCC, which is used to replace the potentiometer output.

The 8 modes of the 8 buttons output 8 voltage values ​​of 0-VCC respectively. In actual use, it is equivalent to turning the potentiometer to 8 different positions.

If used with the flight controller, you can set 8 different modes on the flight controller, and these 8 modes only occupy one channel (it must be an analog channel that can be connected to a potentiometer).

You can always solve the problem of insufficient remote control channels! ! ! Let’s focus on the schematic diagram.

The microcontroller is STC8G1K08 and other SMD components are generally packaged in 0805! ! !

Extremely DIY: Carrot