In this tutorial i will show you how to make a a Simple Light Detecting Sensor using BC547

The Video Tutorial is also embedded with this tutorial.

Step 1: Part List

Part List

1. Resistor (1.2K & 470 Ohm)

2. BC547

3. Green LED

4. Female Headers

5. LDR


Purchase List or Affiliate Link


BC547 - https://goo.gl/Ji200G

Resistor - https://goo.gl/YZrF6L

Green LED - https://goo.gl/HDTkZ1

Female Headers - https://goo.gl/xVJ0Yh

LDR - https://goo.gl/DPdVu9


BC547 - http://amzn.to/2qNmupw

Resistor - http://amzn.to/2rMa1ar

Green LED - http://amzn.to/2rrQxF8

Female Headers - http://amzn.to/2rl9TPn

LDR - http://amzn.to/2rpMPdk


BC547 - http://amzn.to/2qHwH7E

Resistor - http://amzn.to/2rywd6U

Green LED - http://amzn.to/2rMffTL

Female Headers - http://amzn.to/2rpNN9D

LDR - http://amzn.to/2sw9z06

Step 2: Circuit Diagram

Construct the circuit has shown in the circuit diagram.

Working :

1. This circuit is used for detecting light.

2. When the light falls on the LDR the resistance of the LDR reduces & in return turns the GREEN LED on

3. The circuit is based on the typical common-emitter configuration - (When there is small change in input voltage at the base of the transistor, produces large changes in the output at the Common of the transistor)

Thank You for Reading.
For more such projects you can visit my YouTube Channel by CLICKING HERE

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About This Instructable




Bio: I like making new things from trash. For more cool content please subscribe to my YouTube channel @ https://goo.gl/BHxFf7
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