帮助!!用三极管8550怎么做玩具充电电路!!
我司有管客人要一充电器,要三极管8550做开关控制共阳极LED灯,供7.2V800mAH的电池充电,具体电路如下:请各位大侠帮,怎么确定D5,R1,R2,R3的参数?急!!!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/81/632241253498837.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">