Bluethooth Mechanical Arm Made with Ice Cream Sticks

A simple yet interesting way to understand Bluetooth communication and apply it in Servos

IntermediateShowcase (no instructions)150

Bluethooth Mechanical Arm Made with Ice Cream Sticks

Things used in this project

Hardware components

Arduino UNO

SG90 Micro-servo motor

HC-05 Bluetooth Module

Hand tools and fabrication machines

Breadboard, 270 Pin

Servo Motor, Premium Male/Male Jumper Wires

Story

Do you have some old ice cream sticks at home and do not know what to do with them?

Why not create an arm and make it controllable by Bluetooth?

That was our idea with this project! A simple yet very interesting way to apply effective communication and make some Servos move!

Click here to see the movement of the arm!

We also developed a homemade hook to grab some small stuff. I have to say that was not easy to control!

Click here to see the movement of the hook!

mechanicalArm

#include <Servo.h>
#define pinServ1 11
#define pinServ2 10
#define pinServ3 9
#define pinServ4 8

Servo serv1 , serv2 , serv3 , serv4;

int motor1 = 90 ;
int motor2 = 52 ;
int motor3 = 67 ;
int motor4 = 0  ;


char buf;

void setup() {
  Serial.begin(9600);
  Serial.println("The device started, now you can pair it with bluetooth!");

  serv1.attach(pinServ1);
  serv2.attach(pinServ2);
  serv3.attach(pinServ3);
  serv4.attach(pinServ4);

  
}

void loop() {
  while(Serial.available() > 0)
  {
    buf = Serial.read();

    Serial.println(Serial.read());  
    
    if(buf == 'F'){
      serv1.write(motor1 += 4);
      delay(5);
    }
  
     if(buf == 'B'){
      serv1.write(motor1 -= 4);
      delay(5);
    }

    if(buf == 'L'){
      serv2.write(motor2 += 4);
      delay(5);
    }
  
     if(buf == 'R'){
      serv2.write(motor2 -= 4);
      delay(5);
    }

    if(buf == 'G'){
      serv3.write(motor3 += 4);
      delay(15);
    }
  
     if(buf == 'I'){
      serv3.write(motor3 -= 4);
      delay(15);
    }
    if(buf == 'H'){
      serv4.write(motor4 += 4);
      delay(15);
    }
  
     if(buf == 'J'){
      serv4.write(motor4 -= 4);
      delay(15);
    }


  delay(25);
  }

}