Yesterday, Martin McCormick wrote:
/Date: Sat, 13 Dec 1997 06:52:54 -0600
/From: Martin McCormick <DC.CIS.OKSTATE.EDU> martin
/Subject: [OT] Sampling (was Oscilloscope Question
/ . . . around 1980 . . . I wanted to build
/a circuit to let a person who is blind analyze a wave form. Those of us
/with no usable vision have no use for scopes at all, but we sure appreciate
/what they do. What I did was . . .
/ Nowadays, this idea is made a bit easier. I dare say that somebody
/has almost done all the work. The P.C. sound cards can sample at 44.1 KHZ
/rates and one can do anything to the raw data after they are stored so this
/is much more manageable than my old circuit would have been. I assume that
/sound cards have Nyquist filtering built in so that and the aliasing question
/probably means that one would have to be very creative to handle frequencies
/above 44 KHZ, but the neat thing is that sound cards are everywhere and
/ I apologize for the length of this message, but I enjoy reading
/similar postings from others. There might even be some PIC projects come
/from some of the ideas.
/Martin McCormick WB5AGZ Stillwater, OK 36.7N97.4W
/OSU Center for Computing and Information Services Data Communications Group
Hey, Martin, don't apologize! Ideas like this are what make PICLIST
worthwhile. Chatter about
C vs. ASM is BORING. Sermons about off-topic vs. on-topic are TIRESOME. Tips
good code are USEFUL, but ideas for new applications are VALUABLE. They're
reason many of us still subscribe!
-- Mel Evans aol.com 313-747-7196 mevans1027
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