Quantity   Component name
1 × Atmega328P-PU Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
2 × 22pF Ceramic Disc Capacitor
2 × 0.1uF Ceramic Disc Capacitor
1 × 1N4007 Diode
2 × PN2222 NPN Transistors
1 × 1kΩ Resistor
4 × 10kΩ Resistor Pullup/down
1 × LM7085 +5V Voltage Regulator
1 × 3.5mm stereo audio jack
1 × 16MHz crystal
6 × 3mm LEDs, red 1.9V forward voltage, 0.01A current
6 × 330Ω Resistor For LEDs