Description 1 (Detailed & Engaging):
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In this video, we will show you the complete circuit diagram to build a 12V, 7.5Ah Rechargeable Battery Charger with a Full Charge Auto Cut-Off feature. This smart charger automatically stops supplying current once the battery is fully charged, protecting it from overcharging and extending its lifespan.
🛠️ Components used: 12V 3A Transformer, 12V SPDT Relay, BD139 Transistor, EL817 Optocoupler, Zener Diodes, and basic resistors/capacitors.
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