500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/51/1173702913.gif');}" onmousewheel="return imgzoom(this);">请教:12V铅酸蓄电池低于10.5V自动保护?如何设计这个电路
小弟刚工作,遇到个问题,我们厂现在用12V 100Ah铅酸蓄电池,现在想做个保护电路,在11V的时候蜂鸣器报警(已实现),10.5V的时候切断和负载的连接.R1是限流电阻,V1是三极管MJE270,500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/51/1173702913.gif');}" onmousewheel="return imgzoom(this);">
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/51/1173702913.gif');}" onmousewheel="return imgzoom(this);">全部回复(20)
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@hotsnow8
知道版主azhu的博客吗?发一个上来啊,呵呵,我找了好久找不到,谢谢
兄弟:看看我这个行吗?你稍微调节一下R2的阻值就可以设定关断电压
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/52/1176962354.jpg');}" onmousewheel="return imgzoom(this);">
500) {this.resized=true; this.width=500; this.alt='这是一张缩略图，点击可放大。\n按住CTRL，滚动鼠标滚轮可自由缩放';this.style.cursor='hand'}" onclick="if(!this.resized) {return true;} else {window.open('http://u.dianyuan.com/bbs/u/52/1176962354.jpg');}" onmousewheel="return imgzoom(this);"> 0
