如图,调至9v接 一个30并的led(单个LED为 9v 100ma),发现亮一下灭一下亮一下灭一下反复交替,调至高电压最高用万用笔量输出端只有8.2v ?
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如图,调至9v接 一个30并的led(单个LED为 9v 100ma),发现亮一下灭一下亮一下灭一下反复交替,调至高电压最高用万用笔量输出端只有8.2v ?