Light Detecting Circuit Using LDR and IC-CD4093
This is really a good one project to perform in your college for mini projects and also you can make it for fun.
This circuit operates on 9V DC power. When the room light switched off or it goes off due to power cut, the LED in circuit glows automatically.
This project is really chip in cost, simple to design and take less time.
This project consists of two main components IC- CD4093 and a LDR (Light Detecting Resistor) which u can easily get in any electrical shop. Other all components are as shown below.
(2) LDR (Light Detecting Resistor)
(3) 50K Preset
(4) BC547 Transistor
(5) BC547 Transistor
(6) 100KΩ Resistor
(7) 1KΩ Resistor
(8) 10KΩ Resistor
(9) 100Ω Resistor
(10) 22µ 16V Capacitor
(11) 1N4148 Diode
(12) White LED
(13) 9V Battery