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Unread 08-09-2014, 21:13
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Richard Wallace Richard Wallace is online now
I live for the details.
FRC #3620 (Average Joes)
Team Role: Engineer
 
Join Date: Jan 2003
Rookie Year: 1996
Location: Southwestern Michigan
Posts: 3,629
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Re: pic: How Not To Do It: Electronics Edition

I like this!

Control of dc motors is based on ideas from the 19th century. The device pictured is a double-pole, double-throw "knife" switch, made somewhat famous by its appearances in several movie re-creations of Dr. Frankenstein's laboratory.

An FRC speed controller is just a switch like this, improved so that it can be thrown back and forth very rapidly without wearing out, heating up, taking up a lot of space, or requiring much effort.
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Richard Wallace

Mentor since 2011 for FRC 3620 Average Joes (St. Joseph, Michigan)
Mentor 2002-10 for FRC 931 Perpetual Chaos (St. Louis, Missouri)
since 2003

I believe in intuition and inspiration. Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution. It is, strictly speaking, a real factor in scientific research.
(Cosmic Religion : With Other Opinions and Aphorisms (1931) by Albert Einstein, p. 97)
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