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Arduino Nano -- controlling things using a RC controllers - Servos

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This blog post will show you how you can use a FLYSKY RC controller with an Arduino. As part of this demo project I am using the RC controller to control a couple of servos, this concept can be used to control animatronic projects which need DC motors and servos or any other kind of lighting setup. Basically, this project is just a demo and could have achieved by connecting the servo's directly to the receiver, but my plan as part of a couple of future projects is to drive DC motors/steppers and servos to build battle bots..

 

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Circuit

 

The RC controller receiver FLYSKY AFHDS 6 channel is connected to the Arduino Nano PWM pins, the receiver pins are meant to connect servos

  • Any middle pin on the receiver is connected to 5V pin on the Arduino Nano
  • and the outermost pin is connected to the GND pin
  • CH1 is connected to PWM pin#6 on the Nano, which corresponds to roll on the plane
  • CH2 is connected to PWM pin#10 on the Nano, which corresponds to pitch on the plane

 

And the servos are connect to

  • Servo for the base of the 3D printed arm is connected to PWM pin#3
  • And the Arm is connected to PWM pin#5

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Arduino Code

 

Here is the Arduino Code used to print the RC controller inputs to Serial monitor of the Arduino IDE, and control  the two servos

 

//Created for Project14 using Arduino Nano , Flysky RC(AFHDS) controller and Servos.


#include <Servo.h>


int ch1=6; //roll on the RC controller 
int ch3=10;//pitch on the RC controller 
const int servoBasePin = 3;   //Servo connected to the top base of the 3D printed part  
const int servoTeaArmPin = 5; //Servo connected to the Tea bag holder arm of the 3D printed part  
Servo servoBase;  
Servo servoTeaArm;  
int servoValRoll, servoValPitch;
   
void setup() {
   Serial.begin(9600);
   pinMode(ch1, INPUT);
   pinMode(ch3, INPUT);
   servoBase.attach(servoBasePin);  
   servoTeaArm.attach(servoTeaArmPin);

}


void loop() {
  int ch3Pitch = pulseIn(ch3,HIGH,25000);
  int ch1Roll = pulseIn(ch1,HIGH,25000);
  Serial.print("ch3_pitch : ");
  Serial.println(ch3Pitch);
  Serial.print("ch1_roll: ");
  Serial.println(ch1Roll);


  //Mapping the postions to the servos  
  servoValPitch = map(ch3Pitch, 1000, 2000, 0, 180);//values from pitch from 900 to 2000
  servoBase.write(servoValPitch);    
  servoValRoll = map(ch1Roll, 1000, 2000, 0, 180);//values for roll from 1000 to 2000
  servoTeaArm.write(servoValRoll); 


  delay(50);// increase/decrease the delay to match the movement on the gimbal of the RC controller.
}

 

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3D printed parts

For the 3D printed parts i used the STL files from the Automated Tea Dunker , to print all the 3D printed parts I used Hatchbox 1.75mm  PLA  and a Flashforge creator pro.

 

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Here is a quick video demo of the Automated Tea Dunker in action with the RC controller

Attachments:
TeaDunkerSTLs.zip