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15伏变压器怎么改12伏20V充电器

更新时间: 2021-04-15 01:32:38     

1、加个整流器,全波的,再找个三端稳压器12V的,(都要加散热片),找个5K的电阻接个发光2极管做指示灯。

2、这要看电池是多大,15伏变压器输出整流后电压。会降低一点,加上滤波电容的容量虚电压达到将近16伏以上,变压器小的话功率输出达不到,电池小的话,输出电压太高将电池充坏,要合理选用变压器功率,最好能选用调整电流或电压的电路用来充电。

关键词: 变压器 怎么 20v 充电器

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