Light Sensor Circuits

  
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Dark Activated Switch or Porch Light Switch This circuit will activate a relay when light falls to a preset level. Light level can be adjusted with VR1 and the relay contacts may be used to operate an external light or buzzer Dark Activated Switch This circuit will activate a relay when light falls to a preset level. Light level can be adjusted wi
Light Sensor Circuits - schematic

th VR1 and the relay contacts may be used to operate an external light or buzzer, ORP12 photocell Dark activated relay There`s two schematics, one for light activated relay and one for dark activated relay. When the light / dark hits the sensor a relay will be activated Dark Sensitive Switch Dark Sensitive Switch is a simple project which operates a relay when the light falling on the LDR goes below a set point, LDR, pdf file Door Minder This kit uses an infrared beam to monitor door & passageways or any other area. When the beam is broken a relay is tripped which can be used to sound a bell or alarm. Suitable for detecting customers entering a shop, cars coming up a driveway, pdf file INFRARED PROXIMITY DETECTOR This proximity detector using an infrared detector can be used in various equipment like automatic door openers and burglar alarms. The circuit primarily consists of an infrared transmitter and an infrared receiver. pdf file Light Is On When Power Is Out A loss of AC power during darkness (sensed by a photoresistor) turns on an array of battery-powered white LEDs. To conserve power, a timer turns off the LEDs after a particular period of time Light Pollution Meter Light Pollution Meter, Notes on the design and construction of a visual comparison photometer for measuring sky brightness and light pollution



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