Light amp Motion Sensor Circuit Schematic LDR PIR 2 in 1











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Simple light and motion sensor circuit schematic, uses LDR and PIR sensors. • Parts and components list: • LDR (Light Dependant Resistor) • PIR (Passive Infra Red) Sensor • TIP 41 transistor(amplifier) • BD 139 transistor or any NPN transistor • 5K Potentiometer few resistors • 5v Relay • 1N4007 diode • Output: LED, Alarm, Buzzer, Speaker, Doorbell etc. • ~-~~-~~~-~~-~ • Please watch: LDR Light Sensor Circuit Reversed (ON at Night or Daylight) •    • LDR Light Sensor Circuit   Reversed (...   • ~-~~-~~~-~~-~

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