William P.N. Smith
Guest
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 Posted:
Wed Nov 02, 2005 9:22 am Post subject:
Re: is there such a thing? |
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"James Lehman" <james[remove]@akrobiz.com> wrote:
| Quote: | is there such a thing as a slide or rotary switch that mechanically encodes
binary contacts for 6 or 8 bits?
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Well, it wouldn't have detents, but you could use a rotary encoder
wheel and a micro...
I've only seen 4-bit (16 position) binary switches, but that doesn't
mean they couldn't exist. 64 or 256 detents might be hard to make
mechanically, though... |
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Spehro Pefhany
Guest
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| Posted:
Wed Nov 02, 2005 9:35 am Post subject:
Re: is there such a thing? |
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On Tue, 01 Nov 2005 22:22:03 -0500, the renowned William P.N. Smith
<news05@compusmiths.com> wrote:
| Quote: | "James Lehman" <james[remove]@akrobiz.com> wrote:
is there such a thing as a slide or rotary switch that mechanically encodes
binary contacts for 6 or 8 bits?
Well, it wouldn't have detents, but you could use a rotary encoder
wheel and a micro...
I've only seen 4-bit (16 position) binary switches, but that doesn't
mean they couldn't exist. 64 or 256 detents might be hard to make
mechanically, though...
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From memory, Burns makes (or made) a 7-bit mechanical absolute encoder
(128 positions). It used some kind of modified Gray code that could be
realized with a circuit board, IIRC. I have a sample of it somewhere.
There are optical absolute encoders with at least 10-bit resolution,
but you might not like the price.
Of course, incremental optical or mechanical encoders are inexpensive
and easily available.
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
speff@interlog.com Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com
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