想請問各位高手, 唔知這樣裝燈, 有沒有問題呢?

chiharu · 發表於 2006-9-8 00:17:23

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好些緊張, 第一次入來&發問

小弟我上個月才第一次買mini-z, 超嫩, 貪美觀, 自己嘗試買led加燈, 不過沒有讀過理科的我, 當看到自己部車好光時, 很怕唔識計, led燈好快死.......

想請問各位高手, 唔知這樣裝燈, 有沒有問題呢?

1) 超白光led(3.2v-3.8v, 25-40ma), 加了一個100ohm的電阻就駁落車電處.
2) 紅光, 黃光led(2v-4v), 2個led串聯一起, 也加了一個100ohm的電阻就駁落車電處.

p.s: 其實我擔心白光led太光, 我唔知會否好快燒毀, 希望有人可以回答到我啦, ths a lot!!!

以下有些我的mini-z相片, 影得唔好唔靚唔好笑, 是我技術不好而已~

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[ 本帖最後由 chiharu 於 2006-9-8 00:35 編輯 ]

frizen20032003 · 發表於 2006-9-8 00:28:16

chiharu · 發表於 2006-9-8 00:38:23

thanks, 過獎啦．．．
而且我技術差到

，在家中玩了半天，２個倒後鏡已斷予無數次．．．
令我唔想再黏返佢～

ryancmlam · 發表於 2006-9-8 00:38:44

LED is a current driven device. What you need to do is to make sure the forward current is not too high. The typical forward current is aorund 20mA.
Assuming the forward voltage drop of a white LED is 3.2V, the voltage drop in the resistor that connected in series with the LED and voltage source (6V?) is 6-3.2=2.8V. The resistance of the series resistor should be 2.8V/20mA = 140 ohm.
If using a 100 ohm resistor, the current is around 2.8V/100ohm = 28mA. Still within the safety working limit. Should not be a problem.

chiharu · 發表於 2006-9-8 00:46:36

very detail expanation. I think your subject of physic is very good!!
Even I was study art, I still understand, thank you very much~~~

I hope to bring my mini-z to football playground at night to play.....
of course less crash in big area...hahaha

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想請問各位高手, 唔知這樣裝燈, 有沒有問題呢?

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好型＠＠