Quantity   Component name
1 × Espressif ESP32 Development Board
1 × ST7920 chip based LCD Dispaly
1 × General Purpose Transistor NPN
3 × Pushbutton Switch, Momentary
1 × Linear Regulator (7805)
1 × Resistor 10k ohm
1 × Resistor, 470 ohm
1 × Trimmer Potentiometer, 10 kohm
1 × 9V battery (generic)