Subject:
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Re: Micro-Switches, Mux
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Newsgroups:
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lugnet.robotics
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Date:
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Tue, 27 Feb 2001 21:00:29 GMT
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Viewed:
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683 times
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hi Tim,
I've made an overview of the different kinds of multiplexers (including mine
:-)),
and the ultimate suggestion to mux up to 8 switches.
If you still not believe, you can download the Excel program from the same page.
http://baserv.uci.kun.nl/~smientki/Lego_Knex/Lego_electronica/Switch_multiplexer.htm
Tim Hatch wrote:
> See http://www.plazaearth.com/usr/gasperi/3rmux.htm for a 3-input design
> (which I tried to build and made it look very nice--but I was remembering
> the values from memory. I ended using resistors a factor-of-1000 too small
> ;))
>
> However, I don't think that'll help much with a 4-mux. There is only one
> 4-mux I've ever seen on the web, which is available at
> http://www.akasa.bc.ca/tfm/lego_resistor.html
>
> Tim
>
> ----- Original Message -----
> From: Stef Mientki <s.mientki@ids.kun.nl>
> To: <lugnet.robotics.rcx@lugnet.com>
> Sent: Monday, February 26, 2001 5:41 PM
> Subject: Re: Micro-Switches, Mux
>
> > Knowing the resistor inside the RCX is 10 kOhm, you should use a different
> > resistor for each switch,
> > the first resistor should be 10 kOhm, the second 30 kOhm, third 70 kOhm, • fourth
> > 150 kOhm, this will divide the 5V range in nearly evenly spaced sections
> >
> >
> > Ciaran Jessup wrote:
> >
> > > Hi, has anyone had any joy combining the input from several • micro-switches
> > > into one RCX input, I've built a simple multiplexor for three lego touch
> > > sensors, but now I need four!! .. I know this can be done by adjusting • my
> > > current design, except I can't afford to wait for the three weeks it • will
> > > take for me to receive a new Lego Touch sensor from dacta, however I • have
> > > lots of micro-switches lying around.
> > >
> > > I imagine its easier to combine many micro switches as they are just • simply
> > > on off switches so the boundaries are much easier to compute...
> > >
> > > Thank you very much for any help you can provide
> > >
> > > - Ciaran
> >
> > Stef Mientki
> >
> >
--
met vriendelijke groet,
Stef Mientki
email: s.mientki@ids.kun.nl
tel: 024 361 3905
fax: 024 354 1211
Postadres:
KUN / fmw
171 Instrumentele Dienst
Postbus 9101
6500 HB Nijmegen
Bezoekadres:
F.C.Donderslaan 2
6525 GJ Nijmegen
homepage: http://baserv.uci.kun.nl/~smientki/
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Message is in Reply To:
 | | Re: Micro-Switches, Mux
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| See (URL) for a 3-input design (which I tried to build and made it look very nice--but I was remembering the values from memory. I ended using resistors a factor-of-1000 too small ;)) However, I don't think that'll help much with a 4-mux. There is (...) (24 years ago, 27-Feb-01, to lugnet.robotics)
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