An open-source electronics platform called Arduino is built on simple hardware and software. When a motor is activated, an LED is turned on, or something is published online, Arduino boards may read inputs like light on a sensor, a user's finger on a button, or a tweet. Sending a set of instructions to the board's microcontroller will instruct your board on what to do.

The HC-SR04 Ultrasonic Distance Sensor is a sensor used for detecting the distance to an object using sonar. It's ideal for any robotics projects you have which require you to avoid objects, by detecting how close they are you can steer away from them.

A Servo Motor is a small device that has an output shaft. This shaft can be positioned to specific angular positions by sending the servo a coded signal. As long as the coded signal exists on the input line, the servo will maintain the angular position of the shaft.