How to Build a Solar Battery Charger Using LM317T & Transistor Control in Proteus
This video demonstrates a solar-powered battery charger using an LM317T voltage regulator and transistor-based control in Proteus Software. The circuit efficiently charges a 12V battery while protecting it from overcharging.
Key Features:
Solar Panel Input: Converts sunlight to electrical energy.
LM317T Regulator: Adjustable voltage output (set to 12.5V for safe battery charging).
Transistor Control (BC548): Manages charging current based on solar input.
Reverse Protection Diode (1N4007): Prevents battery discharge through the solar panel at night.
Voltage Filtering: Capacitor (C1) reduces ripple for stable output.
How It Works:
Solar Energy Harvesting:
The solar panel generates DC voltage (18V).
Voltage Regulation:
LM317T adjusts output to 12.5V using R1, R2, R3, and RV1.
Transistor Control:
Q1 regulates charging current based on solar input intensity.
Protection:
D1 prevents reverse current flow from the battery to the solar panel.
⚠️ Safety Note: Always use isolation transformers and follow safety protocols when working with high-voltage loads.
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