Arduino Robot Basic

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