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LDR Relay Switch Activated Sensor | 9,138 view(s)

>LDR> Relay> Switch Activated Sensor – electrokit.se

ElectroSuite.comLDR Relay Switch Activated Sensor. The circuit depends on a light sensitive device called a LDR, light dependent resistor, as already described above.

LDR Relay Switch Activated Sensor - ElectroSuite.com

LDR Relay Switch Activated Sensor

The resistance of the LDR depends on the amount of light falling on it. The snake-like track on the face of the LDR is a cadmium sulphide (CdS) film.

Components

  • 1x – 1K resistor brown black red R1
  • 1x – 2K2 resistor red red red R2
  • 1x – 1N4004 diode
  • 1x – 100K trimpot (104)
  • 2x – BC338 transistor
  • 1x – 5mm red LED
  • 1x – 3mm LDR
  • 1x – 12V Relay
  • 1x – DPDT PCB-mounted switch
  • 1x – 3 pole terminal block
  • 1x – 2 pole terminal block
  • 1x – Kit 79A PCB
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LDR Relay Switch Activated Sensor - ElectroSuite.com

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