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abc123
Guest
我用78L05从+5伏电压9伏电池,但它不会工作,当电池电压下降到6.9V时,有些人告诉我,我应该用LDO稳压器,但有任何方式或简单的电路,使78L05工程像一个LDO的?正常的9V电池电压下降到7.5V后很短的时间内非常快。和LDO超过78L05昂贵。
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