This project creates a musical instrument that changes pitch based on the amount of light detected by a sensor.
The Light Theremin uses a photoresistor to measure light intensity and converts these readings into corresponding audio frequencies. By moving your hand over the sensor or changing the ambient light, you can produce different tones through the buzzer. The circuit remains silent in very low light conditions and produces sounds ranging from low to high pitch as light increases.
Parts List
- Arduino board
- Photoresistor (light-dependent resistor)
- Piezo buzzer
- 10kΩ resistor
- Breadboard
- Jumper wires
Assembly Instructions
- Place the photoresistor on the breadboard
- Connect one leg of the photoresistor to 5V on the Arduino
- Connect the other leg to both analogue pin A0 and one end of the 10kΩ resistor
- Connect the other end of the 10kΩ resistor to GND
- Connect the positive leg of the buzzer to digital pin 11 on the Arduino
- Connect the negative leg of the buzzer to GND