Next, we will write loop() function as : void loop() Servo_0.write(Servo_0_Pos) //Move the servo to that position. Pot_0 = analogRead(A0) // Read input from pot and store it in the Variable Pot_0. Which is annoying so we limit the servo to move void Map_Pot()Ī good idea as it makes the servos buzz continuously For this we will define a function and name it Map_Pot() you can name it anything you want it is a user defined function. Now, we will read the values of potentiometers using Analog Input pins and map them to control servos. Read & Map Potentiometer Values to the Servos Serial.println("Press 'R' to Record and 'P' to play") ģ. Servos are set to 100 position at initialization. Servo objects are attached to PWM pins. #Arduino robotic arm serial#Serial.begin(9600) //For Serial communication between arduino and IDE. This is the initialization function that executes once upon controller startup. Now we will write a setup function, where we set pins and their functions. Int Index = 0 // Array index starts from 0th positionĬhar data = 0 //variable to store data from serial input. Int Storage //Array to store data (Increasing array size will consume more memory) Variable to store Current position values Variable to store Previous position values No special explanation is needed for this. Declare Global Variablesįirst we will declare all the necessary variables globally so we can use them throughout the program. #Arduino robotic arm code#Now let us understand the code step-by-step. The logic of this code is fairly simple the values of potentiometers are stored in an array the records are then traversed using a for loop and the servos do the steps as per the values. This system requires a shared ground between the controller and the power supply. Make sure to connect the GN of the servos to the Arduino or else the arm wont work. Note: The Servos are powered by a separate power supply (not the Arduino). Lastly, the servo connected to pin 5 will be controlled by the potentiometer on A1, and so on…. The servo connected to pin 3 will be controlled by the potentiometer connected to A0. We will use Digital Pins 3,5,6,9 & 10 to control the servos Analog Pins A0 to A4 are used for Input from Potentiometers. Then, connect the middle terminal to Analog pin of the Arduino. Now connect the potentiometers to +5v and GND of Arduino in parallel. Next, connect the signal wires i.e Yellow or Orange wire to the PWM pin of the Arduino. (The Red wire to +5V and Black or Brown Wire to GND). If you’ve never used a breadboard before, we recommend checking out this article.įirst connect all the servos in parallel to the power supply. In this step we will make all the necessary connections. When you’re done building the prototype, then you can move onto wiring up the electronics. Lastly, I mounted everything on a poster board, which was used as base. Check out the picture to get a better idea of how this looks. For the Master arm I glued the potentiometers to the popsicle sticks. I used double sided tape to stick the servos to the Popsicle stick and fasten them using screws. My design (shown above) is not very stable and does not have a gripper. And you can try different mechanical designs to make even better arm. You can use any materiel that is available to you. Here I have used Popsicle sticks to make the arm. Another option is to buy a Robotic Arm Kit, which consists of everything needed for this project. You can even 3D print a design or use a CNC machine. If you want to make your own arm you can use an Acrylic sheet or Popsicle sticks. Note: You can increase the number of joints to increase range of motion by increasing servos and potentiometers. Arduino UNO ( Arduino Nano or Arduino Mega ) x 1.You need basic understanding of using Servos, potentiometers, and programming knowledge. Therefore, I wouldn’t recommend this project to absolute beginners. This project is designed for people with experience using Arduino and electronics. Along with this feature, the prototype is also smart because it can record positions and repeat them continuously. The “Slave” arm is comprised of servos and will run off of the potentiometer readings. You can control this arm using a “Master” arm using potentiometers. #Arduino robotic arm how to#In this tutorial, I will share with you how to make a smart robotic arm.
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