Subject:
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RE: Analog/Digital IO
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Thu, 3 Feb 2000 20:09:09 GMT
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Original-From:
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Mar, Ericson <ericson.mar@csfb[StopSpammers].com>
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Viewed:
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1828 times
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Is that how it works? I remeber a time when some students were using a
joystick for a project and recall them dealing with some sort of PWM. As to
whether they were the joystick position signals, I'm not entirely sure.
> Ericson Mar
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> -----Original Message-----
> From: Fred G. Martin [SMTP:fredm@media.mit.edu]
> Sent: Thursday, February 03, 2000 2:28 PM
> To: handyboard@media.mit.edu
> Subject: Re: Analog/Digital IO
>
> hey -- how about a game card! that gives you digital (joystick
> buttons) and analog (resistor readings).
>
> fred
>
> In your message you said:
> > On Thu, 3 Feb 2000, Mike Reiling wrote:
> >
> > > I know this question does not really relate to the handyboard, but • does
> > > anyone know of a cheap PCI or ISA card for a PC to read analog or
> > > digital values?
> >
> > For digital values, you can use a parallel port card, or even
> > handshake lines on a serial port.
> >
> > For analog, you can again use a parallel port, and hook up an external
> > A/D chip. As long as you're not trying to get too many bits of
> > resolution this method works well (like say 8-bits). There are a lot
> > of chips out there that have many input pins for A/D. You select
> > ahead of time which input you want to take a sample on.
> >
> > You might also try looking in Nuts and Volts magazine for cheap
> > PCI/ISA cards. That's a reasonably good place to find such things.
> >
> > Curt Mills, WE7U hacker.NO_*SPAM@tc.fluke.com
> > Senior Methods Engineer/SysAdmin
> > "Lotto: A tax on people who are bad at math." -- unknown
> > "Windows: Microsoft's tax on computer illiterates." -- WE7U
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