An Arduino project to read RC PWM signal from one pin and put the smoothed PWM signal to other pin.
When I say smoothed signal I mean:
- If you switch a slider on your rc transmitter from top position directly to the bottom position, the signal changes suddenly from 1000us to 2000us PWM.
- And if you have a servo connected to the channel on the receiver, the servo will suddenly turn from min position to max position suddenly.
- But if you put an Arduino Nano with SmoothPwmChannel instaled in between the receiver and the servo. The signal will change in a much longer time and smoothly like: 1000.. 1200.. 1500.. 1800.. 2000us.
I wrote (mostly ported) this sketch to install it between my receiver and my NAZA M v2 controller to smooth out the pitch movement of my H3-3D camera gimbal. I Could not achieve this neither with the gimbal or flight controller settings (Because DJI did not add such a feature in their product) nor with my RadioLink AT9 transmitter (Because it doesn't have a "Motor" menu like Futaba (Whatch the method), and it is not OpenSource/Scriptable as FrSky Taranis is (Whatch the method)).
- Adruino board. I used Arduino Nano r3 clone because it is compact and because I easily found it in an electronic components store in our city Baku, Azerbaijan.
- Servo extension cable(s). I had one. I have cut 2 piceces 15 cm long with connectors from both sides of the cable. I have soldered these two cables to the corresponding pins on the Arduino board.
- Heatshrink tubing. To prevent shorting and secure the construction.
- First of all thanks to Youtube user diJMedia for his video explanation of the algorithm: Smooth Ramping Tilt Zenmuse H3-3D GCU with Open TX Lua script and the Lua script he provided. I have ported the algorithm to JS for testing and finally to Arduino.
- Also thanks to MultiWii project team. For their excellent explanation of Arduino PWM generation principles and corresponding pieces of code they have published.
In development process I wrote a script in JS to test the algorithm. It is also published in the repository. Here You can play with it.