Quantity   Component name
1 × ATtiny13A-PU or ATtiny13V-10PU
5 × Button switch 6×6×9 mm should be higher than LEDs
1 × 42 ohm buzzer small passive electrodynamic speaker
1 × Electrolytic capacitor 100 μF 5×7 mm
1 × 5mm red diffuse LED
1 × 5mm orange diffuse LED
1 × 5mm yellow diffuse LED
1 × 5mm green diffuse LED forward voltage should be approx. 2.1 V
1 × Resistor 180 ohm for green LED
1 × Resistor 220 ohm for orange LED
1 × Resistor 330 ohm for yellow LED
1 × Resistor 680 ohm for red LED
1 × Battery holder for CR2032
1 × Lithium battery CR2032 (3 V)