Arduino Tutorials

Ldr interfacing with Arduino

In this post we’ll learn ldr interfacing with arduino uno. Ldr is known as light dependent resistor or Light controlled variable resistor. Resistance of Ldr decreases with increasing light intensity and resistance of Ldr increases with decreasing light intensity. In other sense, it exhibits Photoconductivity. 

Materials required

  • Arduino uno
  • lcd 16×2
  • ldr (light dependent resistor)
  • 10k resistor

Circuit arrangement

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