Dark Sensitive Lamp ON/OFF Controller

Dark Sensitive Lamp ON/OFF Controller


Dark Sensitive Lamp controller project switches a load connected to it when light falling on LDR (Light Dependent Resistor)  goes bellow set point.  It could be used as an automatic street light application. The project is based on Triac and doesn’t requires additional DC supply, it works directly on 230VAC.


  • Mains supply input 230 VAC
  • Output load up to 500 W lamp / bulb
  • Snubber circuit
  • Sensor LDR
  • Screw terminal connector for easy input mains supply and load connection
  • Small size PCB
  • Four mounting holes of 3.2 mm each
  • PCB dimensions 37 mm x 49 mm

Dark Sensitive Lamp ON/OFF Controller – [Link]



Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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