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DIY Solar Street Light | Automatic Night Mode Using IRFZ44N MOSFET

In this project, I made a simple solar street light using a 6V 100mA solar panel (connected in parallel) to charge a 3.7V lithium-ion battery. The circuit features automatic switching when it gets dark, eliminating the need for manual control.

Components Used:

Solar Panel (6V, 100mA)

Lithium-Ion Battery (3.7V)

IRFZ44N MOSFET (for automatic switching)

1N4007 Diode (prevents reverse current)

10kΩ Resistor


Working Principle:

During the daytime, the solar panel charges the battery.

When it's dark, the MOSFET automatically turns on, allowing power to flow to the LED/light.

The diode prevents backflow, ensuring efficient charging.


This is a low-cost and efficient solar lighting system, ideal for small outdoor areas, pathways, or garden lighting.

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#SolarStreetLight #DIY #Electronics #Arduino #RenewableEnergy #SolarPower