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pic: How Not To Do It: Electronics Edition
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Re: pic: How Not To Do It: Electronics Edition
Not too disturbing, if used properly.
It is a great visual example of how an H-Bridge works. Granted there is no speed regulation with it, but with the proper motor and gearing, it is perfect! Besides, the spark show would be quite an attention getter! |
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. |
Re: pic: How Not To Do It: Electronics Edition
Just to clarify, I think the idea of building macro-scale demonstration pieces is great. What bugs me is the utter lack of insulation on pretty much everything (seriously, it'd be almost impossible to touch the actual 'switch' part of this assembly without shocking yourself).
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Re: pic: How Not To Do It: Electronics Edition
How would one shock themselves if the demo is for a standard FRC motor and battery? Unless there's a lot of saltwater involved, its unlikely you'll feel anything.
Now, protecting the battery from shorts is a whole different concern... |
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Yes, it's only a 12V battery, but that doesn't mean it's not extremely bad practice to have massive pieces of exposed circuitry. |
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I'm diggin' the copy of Munkres in the background. :cool:
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I still keep it around, though, for want of any other good references for point-set topology. |
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Bang-bang speed controller Rev. 1.0
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Now all you need is some pneumatics, and you have, well, a spike.
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My favorite part of this is the huge gauge wire on the battery leads and the tiny gauge everywhere else. |
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