A basic Arduino project if you fancy building a small robot to practice Arduino development. Based on Osoyoo so can use same software. I would recommend a visit to the dronebot workshop as he has some great build guides and lessons on this type of build. Fitted with: TCRT5000 IR line follow sensors x 2 40mm double roller chair wheel with M8 shaft fixing Arduino Nano v3 Nano I/O Expansion sensor Shield Module Compatible For Arduino UNO R3 Nano V3.0 IR Sensor CR2025 kit HC-SR04 Ultrasonic sensor mounted on micro servo 2 pin SPDT micro switch for power Youmile motor gearbox wheel combo, 6V brushed motor with gearbox (super cheep at Amazon) IR slot opto light batterier speed sensor for wheels x 2 L298N motor drive H-Bridge driver PP9V battery (rechargable) HC.05 BT module