Скачать или смотреть 🔋 20W Charger Auto Cut-Off + Full Battery Indicator | 3.7V Li-ion Charging Circuit

🔋 20W Charger Auto Cut-Off + Full Battery Indicator | 3.7V Li-ion Charging Circuit #shorts #viral


This video explains how to make a 20W auto cut-off charger with a full charge indicator for a 3.7V Li-ion battery.
The circuit uses BC547 transistor, 4V Zener diode, 5V relay, 220Ω & 68Ω resistors, 5A diode and 18650 battery.

When the battery is fully charged, the relay disconnects the input automatically and the green LED turns ON, showing the battery is full.
Perfect circuit for DIY charging projects and electronics learners. ⚡🔋



Keywords :

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zener diode 4v charging
bc547 relay indicator circuit
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#DIYCharger #FullChargeIndicator #RelayCircuit #BC547 #LiIonCharger
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