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/36/1135942856.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">急求高手帮我改一下美国山特500wUPS
原机是用两块12伏7安时电池串联供电,我想让它只用一块12伏80安时的电瓶供电,清问怎么改最好,最合理,当然简单点好,前级电路我随便画了一下,是用万用表量着画的,没原电路图,功率变换用的是达林顿管两个挽推MJ11033.推动他的是TIP49c,后面的是2222A,应该没啥错误,2222A下面的经两个二极管到sg3524n的11.14脚,应该是发射输出吧.下面的管子是2n432吧,没记清,基极是到lm339n的2脚运放输出吧.电路版上还有一个555块,所有集成电路的vcc电压输入都是由一个lm7812的输出脚给的.我想能不能直接接把12伏电池正给到7812的输出?,望高手指点,小弟感激不尽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/36/1135942856.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" 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/36/1135942856.jpg?x-oss-process=image/watermark,g_center,image_YXJ0aWNsZS9wdWJsaWMvd2F0ZXJtYXJrLnBuZz94LW9zcy1wcm9jZXNzPWltYWdlL3Jlc2l6ZSxQXzQwCg,t_20');}" onmousewheel="return imgzoom(this);">