點整LED燈牌~(20分)

yahoo知識已經有答案:
link:http://hk.knowledge.yahoo.com/question/?qid=7006033000017

燈牌製造的主要元件-- LED 燈粒
發光二極體(LED)是一種固態的半導體元件，利用二極體內分離的2個載子(分別為負電的電子與正電的電洞)相互結合而產生光，屬於冷光發光，不同於鎢絲燈泡的熱發光，只要在LED元件兩端通入極小電流便可發光。LED因其使用的材料不同，其內電子、電洞所佔的能階也有所不同，能階的高低差影響結合後光子的能量而產生不同波長的光，也就是不同顏色的光，如紅、橙光、黃、綠、藍或不可見光等。LED產品優點為壽命長、省電、較耐用、耐震、牢靠、適合量產、體積小、反應快。

用 3 至 4 毫米厚的硬卡紙板, 到一般的文具店舖便可買到一大塊，
回家後裁剪到合適的長方型尺寸，面上貼上裝飾勞作紙，
用筆劃下LED燈的圓孔分佈位置，然後用雕刻刀打孔，接著把LED燈安裝在卡紙板上,
按照電路圖焊接好電線,電池箱及開關掣，再在背面覆蓋一塊硬卡紙板作保護，全部工作完成～～

最花時間是打孔及焊接電線。用電烙鐵及錫線來焊接電線便可, 要小心 LED 燈腳的正負極,
接反了便不亮。

電路圖：http://www.zuoyi.2008red.com/article.php?workid=46085&articleid=5058
http://202.180.175.49/ChinWeb/Applications.htm
http://club.pchome.com.tw/photo/myimg_view.php?click=y&club_e_name=suzuki_dao_club&book_id=1&photo_id=1&photo_flow_no=506525
http://www.51dz.com/dp.asp?sn=12630
註：本人不熟悉電子，謹對燈牌起興趣，也希望專家在此指正。

You need to prepare these components:
LEDs (Important, a English word for about 15-35 LEDs; A Chinese word for about 20-200 LEDs)
Resistors (For reducing the electricity)
ICs or transistors (For LEDs animation like blinking, if you need)
Wires (2 for colored [Red and Blue, packaged by plastic], others for not packaged by plastic)
Circuit board (To solder the components on it, and get connected together)
Soldering tin (To solder the components)
Soldering iron (To make the solder tin melts, and solder the components)
For couse, battery clamp (To put battries in it to support the electircity to the LEDs)
Mostly for over 50 LEDs cannot use on batteries, you can put a battery which can store the electricity with AC/DC 220V.
First, you need to go to Apliu Street. Because you can get all the electronic components at there. If you use red LEDs, you need more resistors, because the red LEDs cannot use the big voltage, they will burn out. If you use white or blue LEDs, you need bigger voltage (Or less resistors), because these LEDs use at least 3V. If you are going to buy soldering iron, first check the shops which sell this price, the cheapest is the best (40W, the cheapest is $23). If you want animation, you need to know the ICs or transistors number first (Example: IC name NE555, transistor name S9023), also how they works.
Prices:
Normaly the 5mm LEDs the prices are about $0.5 to 10.
Resistors only about $0.5-2.
ICs, transistors about $2-7.
Soldering iron (40W, suggested) about $23-36.
Soldering tin for $6.
Big circuit board need bigger price, about $20.
Store electricity battery is hard to find.
Battery clamp for 4s $5, for 20s about $30.
I wish these imformation can help you to make.
If you want more, call me.

2007-01-08 13:07:42 補充：
Remember:Different lighting words have different circuit shape.