![]() ![]() ![]() Glue them together as shown in figure and stick final gear at the very edge. For hook, cut another two pieces of card board of lengths 1cmx7cm & 4cmx5cm. We just need to make the hook to grab and pick the object like a robotic hand. When we attach this setup to the base it should look like, With this, two pieces together looks like. Now glue the fourth and last servo at the edge of second piece as shown in figure. Now cut another cardboard piece with lengths shown in figure below and glue another gear at the bottom of this piece. Then fit the third servo in the first hole. Cut a rectangular hole at one end (leave 0.8cm from bottom) just enough to fit another servo and at another end fit the servo gear tightly with screws or by glue. Take some cardboards and cut them into 3cm x 11cm pieces. The servo rotation must match the diagram. Place a small piece of cardboard on top of first servo and then place the second servo on this piece of board and glue it in place. Make sure the degree of rotation is in the area presented in figure. Next place a servo motor in the middle and glue it in place. Take a flat and stable surface, like a table or a hard card board. In Arduino we have predefined libraries to control the Servo, so it is very easy to control servo, which you will learn along with this tutorial. Go through this tutorial of Controlling Servo Motor using Arduino to learn more about it. The RED wire is connected to power, Black wire is connected to ground and YELLOW wire is connected to signal. A servo motor will have mainly there wires, one is for positive voltage another is for ground and last one is for position setting. We are going to use small servo motors, here we use four SG90 servos. Servo motors are available at different shapes and sizes. So these motors are best for designing robotic arm. Servo motors are proposed for low speed, medium torque and accurate position application. These are not proposed for high speed applications. ![]() Servo Motors are mainly used when there is a need for accurate shaft movement or position. Components RequiredÄŻirst we talk a bit about Servo Motors. Also check our other Robotics Projects here. The whole process has been well demonstrated in the Video at the end. We have used low torque servos here but you can use more powerful servos to pick heavy objects. You can move these servos by rotating the pots to pick some object, with some practice you can easily pick and move the object from one place to another. This Arduino Robotic Arm can be controlled by four Potentiometer attached to it, each potentiometer is used to control each servo. This project will be helpful for beginners who want to learn to develop a Simple Robot in low cost or just want to learn working with Arduino and servo motors. This setup also looks as a Robotic Crane or we can convert it into a Crane by doing some easy tweaks. Here in this project Arduino Uno is programmed to control servo motors which are serving as joints of Robotic arm. Entire process of construction has been explained in detail below. In this tutorial, we are going to design an Arduino Uno based Robotic Arm from some cardboards and servo motors. ![]()
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