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/80/114701249805479.gif');}" onmousewheel="return imgzoom(this);">,遇到问题:1、R100阻值47K以下时,几分钟R100就烧掉.2、输出功率太小,空载时电压5.3V;接500欧负载,电压就降到1V.阻容降压电路
网上找了个阻容降压电路,如下图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/80/114701249805479.gif');}" onmousewheel="return imgzoom(this);">,遇到问题:1、R100阻值47K以下时,几分钟R100就烧掉.2、输出功率太小,空载时电压5.3V;接500欧负载,电压就降到1V.
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/80/114701249805479.gif');}" onmousewheel="return imgzoom(this);">,遇到问题:1、R100阻值47K以下时,几分钟R100就烧掉.2、输出功率太小,空载时电压5.3V;接500欧负载,电压就降到1V.