March 2017
Intermediate to advanced
232 pages
4h 44m
Chinese
Content preview from 自造手冊：新工業革命實務指南
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第 15 章 電子與仙塵
126
您需要什麼？
來看看您所需要的材料清單。如果要亮
起 LED，首先您需要的是…一顆 LED。
LED 代 表
發 光 二 極 體
（
light emitting
diode
），在工程領域裡它的名稱就說明
了一切：這是一個會發光的二極體（二
極體是一種只允許電流從某個方向通過
的元件）。後續在製作電路時就會知道，
LED 的二極體特性是相當重要的。
LED 相當便宜；從網路上可以一次買到
一大包，每個單價差不多美金 2 分錢。
它們什麼顏色都有，從可見光到不可見
光都有，也就是從紅外光到紫外光。
您所需的第二個東西是電阻。正如其名，
電阻會阻擋所經過的電流。
想像有一塊海綿塞在水管裡，這使得水
流（或電力）從洪水變成涓滴。電阻各
自有不同的電阻值，從很小到非常大都
有，以不同顏色的色環標示在它們的表
面。而至於本專題的用途，您需要色環
是橘、白、棕的電阻。第四環就沒這麼
重要了，它可能是金色或銀色。這些顏
色代表的是 390 歐姆的電阻值，
但您可
用 1K 歐姆 電阻（棕、黑與紅 色 ）來代
替。
如果您手邊的是五環（藍色）
電阻，代表五環
390 歐姆的頭
四環會是橘、白、黑與黑。代
表五環
1K 歐姆的頭四環會是
棕、黑、黑與棕。
您需要某些形式的能量來源才能對電路
供電；最簡單的做法就是具備夾頭的 9
伏特電池。最終，您會需要某些較細的
電線把這些零件接在一起，再用絕緣膠
帶把所有東西都捆好。
您 可在此找 到 本 專 題 所 需
的 所 有 東 西（ 除 了 電 池 與
膠 帶 之 外 ）：
Maker Shed's
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.