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1 Watt LED Emergency Lamp Circuit Using Li-Ion Battery | Homemade Circuit Designs Just for You
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日期：2025-10-14
The post explains an emergency light circuit using 1 watt LED and Li-ion cell ... The PNP transistor is held reversed biased as long as mains AC stays active, while the Li-Ion cell is charged gradually charged. In case the mains AC fails, the transistor s...看更多
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