Sunlight controlled lamp!!!
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This document describes a simple DIY electronics project called the Sunlight Controlled Light Electronics project. It functions as a street light that is powered by sunlight during the day and turns on automatically at night. The project uses a phototransistor to sense light levels and control two other transistors to drive 12 LEDs. When sunlight is present, the phototransistor conducts and the LEDs remain off, but in the absence of light, the transistors power the LEDs. The project aims to demonstrate energy conservation by only using lighting when needed.
Sunlight controlled lamp!!!
- 2. Energy conservation is a major topic of discussion nowadays. To solve the problem of energy wastage, technological experts are putting out great efforts. Most of the energy usage reports indicate that major part of the energy is used at night hours. In such a situation, Sunlight Controlled Light Electronics project found to be a very useful and interesting simple DIY electronics project model for street light used at the society. This is, simple DIY electronics project that can be implemented and demonstrated by the students with ease and also they can convey the need of saving energy.
- 4. Unit requires reflected sunlight for satisfactorily working. Do not face sensor directly to bright sunlight . In presence of sunlight sensor conducts. Then both transistors stop conduction and L.E.D’S will not be driven . But in absence of light transistors conduct and L.E.D’S are activated.
- 5. Unit can be tested by converting sensor with fingers. This project will work with sunlight and light from filament bulb not with tube light or C.F.L. emitting fluorescent light. By adjusting 1 MEG present sensitivity of project can be adjust.
- 7. MATERIALS REQUIRED. 12 White L.E.D.- Photo-transistor - Simple Resistors & Capacitors - Transistor - Power supply - PCB board -
- 8. The function of each LED is to act as a light source in the S.C.L. CIRCUIT. Light sensing is done by the phototransistor which converts the light sensed into current. The other two transistors in the kit are required to drive the LED’s. In sunlight conditions the phototransistor conducts and both the other transistors will not conduct. In the absence of sunlight, light sensor phototransistor will not conduct and the other transistors will conduct and finally it will drive the LED’s. Power supply required for this board is 12V DC.
- 12. THANKYOU