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Automatic Night Light/Street Light using transformerless power supply

 

 

Project Name:

Triac control automatic Night Light using transformerless power supply.

Objective:

The main objective of this project is to save energy. Worldwide a lot of energy is wasted just for ourĀ laziness.

We forgot every-time to switch off our lights at day time. This circuit will help us to switch on & off our lights automatically. Not only our home, it is also helpful for our street light.

Why Transformerless Supply?

Let’s talk about the “Transformerless Power Supply”. To drive our circuit, minimum 5v are necessary . Now there are so many option to provide that 5v.

  1. Using 220v to 5v Step-Down Transformer
  2. 220v to 5v adapter
  3. 5v battery
  4. Using Transformerless supply

Now in our circuit we don’t need large amount of current, some few milli-amps will be fine to drive our load.

So the best choice will be the transformerless supply because it is easy & low cost.

 

Watch the Tutorial:

Components Required :

  1. 224J Capacitor, 400v………………………….https://goo.gl/2yo5w1
  2. 1 Megaohm resistor, 1/4 watt……………….https://goo.gl/1encPg
  3. 1N4007 diode*4…………………………………https://goo.gl/vZM7uU
  4. 100 ohms resistor, 1 watt or above……….https://goo.gl/Vc9q89
  5. 470 uf capacitor, 35v or above……………..https://goo.gl/Dxy6BC
  6. 5.1v zener diode, 1 watt……………………….https://goo.gl/Y1X7kD
  7. 10k Resistor, 1/4 watt…………………………https://goo.gl/6dQY6o
  8. LDR (Light Dependent Resistor)……………https://goo.gl/s9mMMT
  9. Bc 547 Transistor or Any NPN Transistor……….https://goo.gl/nBCmo6
  10. 220 ohms Resistor*4, 1/4 watt…………………https://goo.gl/DTuYXH
  11. MOC3021 Optocoupler IC…………………https://goo.gl/eW8qgw
  12. BT 136 Triac……………………………https://goo.gl/mAaGuD
  13. Connector*2( optional )……………..https://goo.gl/jTxAmk
  14. Universal Pcb………..https://goo.gl/XAWcez
  15. 220V Power Supply Cable
  16. Any 220V Load like Led Bulb

 

Circuit Diagram:

https://drive.google.com/file/d/1Rql1fvir6fhlsdM1b3ErVzcQ7-5p5INm/view?usp=sharing

 

Order the Components :

In this project I use LCSC.COMĀ 

“Lcsc.com” one of the largest Electronics Components provider around the world.

Here are some best thing about LCSC.COM

  • A lot of components available
  • Price is very cheap
  • 4$ off at first order
  • Fast delivery
  • Very good packaging for every components with details
  • Also they provide components “Datasheet” , So you don’t need to find Datasheet at different website.

Visit the website- WWW.LCSC.COM

 

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Caution:

“Please Do not Touch any component while the circuit is plugged in.

This is not an Isolated circuit. This can give you badly shock.

Do it as your own Risk. I/HowToBro will not be responsible for any unwanted situation.”

 

 

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