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/82/3637851256268439.gif');}" onmousewheel="return imgzoom(this);">PC817和TL431的配合
大家好,我不太会做电源这个图是我抄来的,想叫其工作在24V 3A的状态下,但是R6 R7的阻值不会设定,有高手帮我算下吗?另外帮忙看下这个图那里有错误的地方!!!谢谢!!!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/82/3637851256268439.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/82/3637851256268439.gif');}" onmousewheel="return imgzoom(this);">