4V電壓的電池還真少見,比較安全的是串上一兩個2極管把電壓降下來
所有跟帖:
• 一個普通二極管壓降大約是0.7V,要串,一個就夠了。 -白雲青山- ♂ (0 bytes) () 02/02/2016 postreply 12:10:26
• 一個普通二極管壓降大約是0.7V,要串,一個就夠了。 -白雲青山- ♂ (0 bytes) () 02/02/2016 postreply 12:10:26
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