ldr - Dark sensor using relay - Electrical Engineering Stack Exchange
Dark Detector using LDR and 555 Timer IC
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MakingaLight / Dark Sensor
Light Sensor and Darkness Detector Circuit Using LDR + 555 IC
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Light Sensor and Darkness detector circuit using LDR and Transistor
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LDR Darkness sensor circuit - Electric DIY Lab
I'm making a simple dark sensor project with a light dependent resistor (LDR) and I want to replace the LED with a buzzer but it doesn't work - Electrical Engineering Stack Exchange