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A high-power LED torch using a single AA-battery
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日期：2026-04-25
Intro: A high-power LED torch using a single AA-battery This high-efficiency design can power LEDs at 100mA of current and is not much bigger than the battery that powers ... Step 1: The circuit and layout. The circuit uses a BC327 (PNP) and a BC337 (NPN ...看更多
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