Quantity   Component name
1 × 220R resistor R8
1 × Ultrasonic sensor, HC-SR05
1 × MCP23017 Microprocessors, Microcontrollers, DSPs / IO Controllers, U1
1 × LettuceLab PCB Electronic Components / Misc. Electronic Components
1 × L293D Interface and IO ICs / Peripheral Drivers and Actuators, U2
1 × Assorted pin headers male and female
1 × Mega R3 stackable headers
1 × 10K resistor R1, R2, R3, R4, R5, R6, R7
1 × Arduino Mega
1 × LDR Resistor Networks / Thick Film Networks
1 × LEDs Electronic Components / Misc. Electronic Components D1, D2, D3, D4, D5
2 × Motors M1, M2
1 × Acrylic base
1 × Soldering iron
6 × Pushbutton SW1, SW2, SW3, SW4, SW5, SW6