解剖并改进劣质8LED电筒

前几天在白鹤市场买了只12元的8LED电筒(用一节5#电池),当时有急事没试试,回家一看,用充电电池几乎发不出光来,用1.5V的碱性电池亮不了一分钟就灭了,真是气死我了!!
8LED灯修理之前
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可恨的是我想先修修看看
用5LED板测试8LED灯头
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用5LED板测试8LED灯头1
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用5LED板测试8LED灯头2
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根据实物测绘的原理图,电感电容是用电感表量的
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5LED灯头和待修的8LED灯头
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5LED灯头内的铜垫片
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5LED的正常工作电流为60mA(1.5V),这灯的质量不错.修理过的8LED电筒用一级npn时电流50mA(1.5v),亮度稍差,增加一级npn电流100mA亮度显著改善,又增加一级npn后电流200mA,达到理想水平.
结果
8LED灯修理完后惨不忍睹,不过效果还行
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