Article View: comp.dsp
Article #42Re: Convert PC to O-scope????
From: John Haddy
Date: Sun, 01 Nov 1992 02:49
Date: Sun, 01 Nov 1992 02:49
28 lines
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1767 bytes
In article <29928@nntp_server.ems.cdc.com>, hort@hollywood.ems.cdc.com (Mark Hortman) writes:
|> There is going to be a fair this weekend where I could by a cheap Oscilloscope.
|> I was thinking it might be as easy to use my PC and it's gameport as a
|> A/D converter and use it as an O-Scope.
|>
|> Anyone done this for 5 or 12 volts?
|> Seen any free/share ware to help?
The (IBM) PC's game port isn't truly an A/D converter. It merely measures the
timeconstant of the RC circuit formed by the joystick and an on-board
capacitance. Short of using a similar technique (with a lousy b/width), the game
port won't let you measure analogue signal levels.
You could make a PC oscilloscope if you were prepared to purchase a third party
add-in ADC card for your PC.
John Haddy
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Newsgroups: comp.dsp Path: arc1-ca.pugleaf.net!sparky!uunet!munnari.oz.au!metro!sunb!macadam!johnh From: johnh@macadam.mpce.mq.edu.au (John Haddy) Subject: Re: Convert PC to O-scope???? Message-ID: <1992Nov1.024948.1002@mailhost.ocs.mq.edu.au> Sender: johnh@macadam (John Haddy) Nntp-Posting-Host: macadam.mpce.mq.edu.au Organization: Macquarie University, Sydney References: <29928@nntp_server.ems.cdc.com> Date: Sun, 1 Nov 1992 02:49:48 GMT Lines: 28