How to make Fix 4.2v circuit for 18650 battery charger

In this video i will show you how to make fix 4.2v circuit for 18650 battery charger at home using transistor d882 and TL431. Easy 18650 battery charge controller circuit make at home, fix 4.2 volt circuit for charge 18650 battery circuit diy projects make at home.
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Видео How to make Fix 4.2v circuit for 18650 battery charger канала ABTabi