In this mini project of the street light circuit using ldr we are going to operate street light using a light dependent resistor ldr objective the purpose of this mini project is to switch off the street light in the day and switch on the street light in the night components required following are the continue reading street light circuit using ldr electronics project. Welcome to circuit easy mini projects easy to make basic electronics projects using simple circuit diagram for student hobbyist and educationist all are diy do it yourself and efy projects for school experiment using sensor clap switch classical project for turning on off appliances by a sound of clap automatic street light needs no . Street light switch circuit the switching circuit is built around light dependent resistor ldr1 transistors t1 through t3 and timer ic1 the resistance of ldr1 remains low in daytime and high at night timer ic1 is designed to work as an inverter so a low input at its pin 2 provides a high output at pin 3 and vice versa. Here is a simple expensive and easy to use electronics street light switch using ldr and ne555 the working of this circuit is truly based on light sensing ie automatic turn it on in night no sunlight available and turn it off at sunshine sunlight available. An introduction needs no manual operation for switching on and off when there is a need of light it automatically switches on when darkness rises to a certain level then sensor circuit gets activated and switches on and when there is other source of light ie daytime the street light gets off
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