This is a heart shaped Bicolor multiple LEDs DIY electronic kit with Happy Birthday music tune for absolute electronics beginners. This kit gives you a lot of ideas about bicolor LED, buzzer, music chip, transistors, and resistors.
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It is yet another dark sensor circuit using a BC547 NPN transistor and a photoresistor. When the light falling on the photoresistor is blocked, the circuit turns on the LED.
Its output is exactly opposite to the output of a light sensor.
This is a simple light/dark sensor circuit built on a breadboard. This project is suitable for electronics beginners.
The LED connected to the transistor stays on until the light falling on the photoresistor is blocked.
Learn to build a dark sensor circuit using NE555. It is similar to other dark sensor projects. The project is good for school students.
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