dave1888
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| posted on 11/3/06 at 01:24 PM |
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In the spirit of Locost
I found this on the net. Can't cost that much to make.
http://martybugs.net/electronics/speedo.cgi
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chrisg
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| posted on 12/3/06 at 11:13 AM |
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looks good but I was out of my depth in the second paragraph.
I'm not good with electrickery
Cheers
Chris
[Edited on 12/3/06 by chrisg]
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MikeRJ
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| posted on 12/3/06 at 09:58 PM |
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It won't cost much, but it would be much simpler and very likely cheaper to use a micro such as a PIC instead of the discrete logic. It will
also be far more stable, that design has it's clock derived from a 555 timer IC which will not be particularly stable over time or with
temperature changes.
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chrisg
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| posted on 13/3/06 at 09:33 PM |
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Yes, that's what I thought.
You definately need a wibble capacitor to enbongalate the resitivator.....
Cheers
Chris
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MikeR
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| posted on 13/3/06 at 10:29 PM |
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i thought that if i removed the 555 timer and the wibble capacitor both could be replaced by some uranium housed in a flux capacitor. This would give
a much more stable time signal - although would be subject to some other minor environmental issues.
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Peteff
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| posted on 14/3/06 at 12:20 AM |
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Weapons grade plutonium would be better I think with a strontium core condenser, flux capacitors are so 90's.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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MikeR
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| posted on 15/3/06 at 12:09 AM |
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yeah but i like retro - thats why i'm building a replica 50's sportscar!
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Patching Cars
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| posted on 19/3/06 at 10:28 PM |
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quote:
Originally posted by MikeR
i thought that if i removed the 555 timer and the wibble capacitor both could be replaced by some uranium housed in a flux capacitor. This would give
a much more stable time signal - although would be subject to some other minor environmental issues.
But wouldn't that limit you to a top speed of 88 mile per hour without unwanted side effects?
I quite like the idea, and have added it my collection of useless circuit designs along with my digital boost gauge.
Rob
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