Capacitance switches
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Posts: 46,084
There's a kind of switch / button that (I think) works by looking at
capacitance changes, so that only a minimal touch of the button (or
sometimes just getting close to it) will set it off. They're sometimes
used in elevators. I'm looking for a switch which will act this way, but
without a lot of complicated circuitry on the microcontroller side. Any
ideas?
Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
Seattle - Bellingham - Vancouver - Portland - Everett - Tacoma - Bremerton
email: lamont@a... WWW: http://www.serv.net
"Do not fear mistakes, There Are None" - Miles Davis
capacitance changes, so that only a minimal touch of the button (or
sometimes just getting close to it) will set it off. They're sometimes
used in elevators. I'm looking for a switch which will act this way, but
without a lot of complicated circuitry on the microcontroller side. Any
ideas?
Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
Seattle - Bellingham - Vancouver - Portland - Everett - Tacoma - Bremerton
email: lamont@a... WWW: http://www.serv.net
"Do not fear mistakes, There Are None" - Miles Davis
Comments
>There's a kind of switch / button that (I think) works by looking at
>capacitance changes, so that only a minimal touch of the button (or
>sometimes just getting close to it) will set it off. They're sometimes
>used in elevators. I'm looking for a switch which will act this way, but
>without a lot of complicated circuitry on the microcontroller side. Any
>ideas?
>Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
On Tue, 26 Nov 2002, Tracy Allen wrote:
>
> http://www.qprox.com/
>
>
>
> >There's a kind of switch / button that (I think) works by looking at
> >capacitance changes, so that only a minimal touch of the button (or
> >sometimes just getting close to it) will set it off. They're sometimes
> >used in elevators. I'm looking for a switch which will act this way, but
> >without a lot of complicated circuitry on the microcontroller side. Any
> >ideas?
> >Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
>
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Sean T. Lamont, CTO / Chief NetNerd, Abstract Software, Inc. (ServNet)
Seattle - Bellingham - Vancouver - Portland - Everett - Tacoma - Bremerton
email: lamont@a... WWW: http://www.serv.net
"Do not fear mistakes, There Are None" - Miles Davis