HomeCircuitsSimple Light Sensor Circuit without LDR Using BC549 NPN Transistor

Simple Light Sensor Circuit without LDR Using BC549 NPN Transistor

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‘Arduino

In this video, I will make the Simple Light Sensor Circuit without LDR Using BC549 NPN Transistor

YouTube Video:

Circuit Diagram:

Light Sensor circuit without LDR with 5 LEDs as Load

Light Sensor circuit without LDR with 4 LEDs as Load

Light Sensor circuit without LDR with 3 LEDs as Load

Light Sensor circuit without LDR with 2 LEDs as Load

Light Sensor circuit without LDR with 1 led as Load

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This is a simple Light Detector Circuit using BC549 Transistor. Here I have used 2 NPN Transistors for Amplification. First BC549 Transistor that is connected with the 5MM Green Flat LED sensor used for sensing the Light. But this sensing Power is so low. So, we need to amplify this signal for using it.

Here comes the 2nd NPN Transistor. This Transistor’s Base gets a signal when we give light to the sensor. So,

In this way, the 2nd Transistor Gets power and Turns on its connected load. Here the Load is the 5MM LED. You can use any NPN Transistor for this project.

Simple LED Chaser Circuits: https://circuitbest.com/music-reactive-led-strip/

Instructables: http://bit.ly/ccinstructables

Needed Components Online Link About Simple Electronics Circuit with BC549 Transistor :

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Amazon India:

**Note: Use a heat shrink tube for making all connections Secure.

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TimeStraps:

  • 00:00 Simple Light Sensor Circuit without LDR Using BC549 NPN Transistor
  • 00:31 Using 5MM White LED for Light Sensor circuit
  • 01:02 LED Connection with Transistor
  • 01:39 Resistor connection with LED for current Limiting LED
  • 02:14 BC549 NPN Transistor connection with Resistor
  • 03:01 470R Resistor connection for the Amplification process
  • 03:23 5MM Flat Green LED Connection for Simple Light Sensor Circuit
  • 05:17 Using Copper wire for LED Connection
  • 08:08 Pretin LED Wires for better solder joint
  • 08:59 Wire connections for LED String
  • 10:52 3S, 18650 Battery connection for powering Simple Light Sensor Circuit without LDR
  • 11:13 Schematics/ PCB Making software i.e. Altium I am using right now.
  • 11:46 Testing Of Simple Light Sensor Circuit without LDR Using BC549 NPN Transistor
  • 12:44 Circuit Diagram of Simple Light Sensor Circuit without LDR Using BC549 NPN Transistor

I hope this video was Useful and you liked it if you did press the thumbs up button. Cheers! Creative Creator 🙂

#Electronics #Circuit #Projects

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