Subject:
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Gray code vs. Binary
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Newsgroups:
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lugnet.technic
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Date:
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Thu, 20 Oct 2005 18:26:39 GMT
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Viewed:
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3627 times
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To all those pneumatic gurus.....
The classic pneumatic timing circuit made with one switch per piston changes
state following gray code (i.e. only one piston changes at a time). This means
that a two piston timer goes through these states:
00-10-11-10 vs. a binary sequence of:
00-01-10-11
For three pistons we get
000-100-110-111-011-001 a sequence length of 6 vs. binary that gets this:
000-001-010-011-100-101-110-111 a seqeunce of length 8.
To get a gray code of length 8 takes four pistons:
0000-1000-1100-1110-1111-0111-0011-0001
Has anyone spent time creating a binary sequencer for two or more pistons? I
have not, and could use one if it was cheaper than gray code, either in time or
in parts.
Kevin
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Message has 1 Reply:
 | | Re: Gray code vs. Binary
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| (...) Hi Kev, I think the cheapest way to do 3 or 4-bit binary with pneumatics would be to use gray code and convert it. Gray code always changes the least significant bit possible in order to achieve a change to a new state, so there will always be (...) (19 years ago, 20-Oct-05, to lugnet.technic)
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