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CECP Project
NO MEDIA
⚡ Beginner
Hardware Prototyping
Completed
Automatic Street Light Using LDR and BC547 Transistor
An automatic street lighting system that switches ON during darkness and OFF during daylight using an LDR (Light Dependent Resistor) and a transistor-based switching circuit. The system eliminates manual operation, conserves energy, and improves efficiency in public lighting.
Hardware: Analog electronics (LDR
transistor circuit) Tools: Basic circuit design
N
LEAD
Nandni Tyagi
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The GitHub repository, documentation, and demo links for this project are protected. Only club members and authorized users can access these resources.
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Technical Specification
This project uses a simple analog circuit consisting of an LDR, BC547 NPN transistor, LED, resistor (100kΩ), and a 6V battery.
The LDR changes resistance based on light intensity
In daylight → low resistance → transistor OFF → LED OFF
In darkness → high resistance → transistor ON → LED ON
The BC547 transistor acts as a switch, controlling current flow through the LED. The 100kΩ resistor ensures proper biasing of the transistor. The circuit operates on low voltage (6V), making it safe, cost-effective, and suitable for small-scale implementation.
Team
1 MEMBERS
Nandni Tyagi
Project Lead