Quantity   Component name
1 × ATMega328P Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
1 × L293D Interface and IO ICs / Peripheral Drivers and Actuators
1 × LDR Resistor Networks / Thick Film Networks
1 × LM741 Amplifier and Linear ICs / Operational Amplifiers
1 × IR LED (5mm) Any old IR LED, but the one we are using is backwards (long leg is negative for some stupid reason. yes the datasheet says this is not a photodiode), so mind the polarity!
4 × LED Fiber Optics / Emitters
1 × 16MHz Crystal Oscillator Gotta get them MIPS somehow
2 × 22pF Capacitor For the crystal of course
1 × LM7805 Power Management ICs / Linear Voltage Regulators and LDOs
4 × 1N4001 (or any 1N400X diode really) Discrete Semiconductors / Diodes and Rectifiers
2 × DC motors (your choice)
1 × DC Barrel Jack
1 × Tactile Button (for reset)
1 × Ultrasonic Sensor
1 × 2x3 Pin header for ICSP (optional)
1 × Servo Motor (for panning with Ultrasonic Sensor; optional)
1 × 20K Potentiometer
2 × 10K resistor
4 × 180 Ohm Resistor (for LEDs, higher value can be used)
1 × IR Receiver
1 × 0.1 uF Capacitor
3 × Electrolytic Capacitors for LM7805 (values TBD)