http://hk.myblog.yahoo.com/xiao-laba/photo?pid=679&fid=-1
上星期六到武陵農場夜遊, LED 手電筒用到無曬電不亮, 搞到披星戴月. 回來後檢查電池, 其實還可以繼續提供電力給一個 LED 燈仔, http://hk.myblog.yahoo.com/xiao-laba/article?mid=342}
只是這個普通的 LED 手電筒, 3節 AAA 電池串聯 (1.5Vx3 = 4.5V), 電壓低過3.9V, 基本上就沒有辦法繼續. 為了下一次不需要披星戴月, 讓電池的能量發揮到極點, 計畫把這個 LED 手電筒 DIY 一下下, 提高效率, 電池電壓下降到 1.5V 時還能繼續. 因為這 LED 手電筒一共有九顆 LED, 首先要做的, 實驗一下, 原來設計的 簡單的電感 + LED, 1.5V 電池點燈仔 http://hk.myblog.yahoo.com/xiao-laba/article?mid=342}, 有沒有能力去推動九顆 LED.
An example of apple-to-apple, 1.5V LED driver & the torch
Disassemble the torch
Check result, 1.5V LED driver is capable to drive 9 LED
The special design of 1.5V LED booster for this housing
Device under test with complete assembly, it is OK
Re-assemble the torch, now this babe is able to lite form 4.5V, as long as the battery down to 1.5V
註: 玩玩BUBUJIT, 只有癢沒有其他
this kit for DIY is avaliable.
