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<br />升压用ht7750(100mA)或ht7750A(200mA)<br /> <br /><img src="https://bbs.21ic.com/upfiles/img/20094/200942910336362.gif"><br /> <br />低电压检测用ht7027或ht7033,你的3.1V定得有些不妥,厂方只出2.7V及3.3V两种规格是有道理的,不妨稍作修改削足适履,硬要3.1v,就用电阻分压后,用ht7027检测,检测到低电压后输出信号用一三极管放大后点亮led.<br /> <br /><img src="https://bbs.21ic.com/upfiles/img/20094/20094291045772.gif">
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楼主
