Basic Light Level Monitor

Requires

This project reads the ambient light level via the LDR and outputs the value to the Serial Monitor.

Parts Required

  • Arduino Uno
  • 10kฮฉ LDR
  • 10kฮฉ resistor
  • Breadboard and jumper wires

Assembly Instructions

  1. Connect one leg of the LDR to 5V.
  2. Connect the other leg of the LDR to A0 and also to one end of the 10kฮฉ resistor.
  3. Connect the other end of the 10kฮฉ resistor to GND.

This forms a voltage divider where the LDR and resistor divide the voltage based on light intensity.