32 LED手电改造

qdbirds · 发表于 2005-9-30 04:50

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<img src="attachments/dvbbs/2005-9/20059292104033982.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059292104033982.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
花了70+15元
<img src="attachments/dvbbs/2005-9/20059292051374165.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059292051374165.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> 虽有“反光碗”，实际却没多大作用。LED品质不太好，用透镜看投影有五六颗颜色发黄 <img src="attachments/dvbbs/2005-9/20059292072773122.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/20059292072773122.jpg\');}" onmousewheel="return imgzoom(this);" alt="" />
本来是两种点亮方式，内14或全32亮，已改成全亮全灭。为了加散热片，把焊点搓平 点亮几分钟后很热，估计有近50度（忘记实测）
<img src="attachments/dvbbs/2005-9/200592920105756849.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/200592920105756849.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> 花20元找人加工的散热片（7两铜棒28元），用导热硅胶灌封 
<img src="attachments/dvbbs/2005-9/200592920261948406.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/200592920261948406.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> 两段切换开关，左边串1欧姆，右边串0.39欧姆 这个开关可以自己该成4段切换（甚至8段），不过在这个手电上2段足够。市面上有类似的2段开关，比这个厚3MM，如果开关内部是旋转式的也可以改 上面是昨天拍的，散热片已粘好，电筒已经装配完毕。凡有利于散热的地方都涂了导热硅脂，开5分钟后灯杯发热明显，8分钟后桶身发热明显，室温23度，灯杯33度。散热片外径有些小，与筒身接触面小，影响了散热效果
下面是测试数据
5:37 0.63A 6:13 0.60A 8:20 0.39A 0.66A(0.39欧，这会切换过来电流有点大) 8:37 0.37A 0.63A（正式切换到0.39欧姆档） ………………
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[此贴子已经被作者于2005-9-29 21:02:06编辑过]

sjb3658 · 发表于 2005-10-1 04:30

改风冷。。。

冰冻小章鱼 · 发表于 2005-10-1 05:05

光斑图？哈

junfeixu · 发表于 2005-10-1 05:19

接触到会短路，不接触如何散热？？？[em06][em06][em06]

qdbirds · 发表于 2005-10-1 07:28

<img src="attachments/dvbbs/2005-9/200593023232749113.jpg" border="0" onload="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onmouseover="if(this.width>screen.width*0.7) {this.resized=true; this.width=screen.width*0.7; this.style.cursor=\'hand\'; this.alt=\'Click here to open new window\nCTRL+Mouse wheel to zoom in/out\';}" onclick="if(!this.resized) {return true;} else {window.open(\'attachments/dvbbs/2005-9/200593023232749113.jpg\');}" onmousewheel="return imgzoom(this);" alt="" /> 
这是卖家拍的，左边是新三娃。不过这是在32led没串电阻的情况下拍的，4.2v时大约930ma，在这个状态下灯头是不会长久的………… 散热片与led正负极虽不接触（间隔2mm），但导热硅胶可以导热。本来想换好一点儿的led，将全部的负极焊到散热片上，这样散热效果会更好，可惜因急用来不及折腾

qdbirds · 发表于 2005-10-1 07:35

昨天从8:37切换到0.63A，持续不到15分钟就明显变暗，虽然这节电池有些老化，不过即使是好电池在这个时候切换也有些迟了。把0.39欧姆换成0.72欧姆，在使用2小时后切换比较合适（约0.64A），后2小时与前2小时的亮度曲线比较接近。

sjb3658 · 发表于 2005-10-1 11:45

很好。

junfeixu · 发表于 2005-10-3 06:00

原来那个空隙靠硅胶！！！

qdbirds · 发表于 2005-10-4 04:13

<DIV class=quote>以下是引用junfeixu在2005-10-2 22:00:18的发言： 原来那个空隙靠硅胶！！！</DIV>

是导热硅胶，CPU用的[em06]

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