1 Jul
2006
1 Jul
'06
1:27 p.m.
Chuck Guzis wrote:
On 7/1/2006 at 8:26 PM Jules Richardson wrote:
Sound card sure seems easier! :>
Build a WAV file and just have it "play" endlessly.
I'm thinking that something like that (though
obviously not porn-based :-)
would make a nice little self-contained display
for our museum. PC +
soundcard
under the desk, nice old Tek 'scope running as a little scrolling message
display with the museum name or something... I don't know, it's oddball
enough to be quite eye-catching, but fairly trivial to implement.
EDN and Electronic Design have had several articles on how to hook up an
DAC to a parallel port--just do it twice (maybe use a spare control line
for X-Y selection) and you've got all the circuitry done.
For example:
http://www.elecdesign.com/Articles/Print.cfm?AD=1&ArticleID=6257
If you had two parallel ports, you could save some money at the expense of
accuracy, by using a simple resistive ladder DAC:
http://www.epanorama.net/circuits/dacs.html
The rest, as they say, is trivial software. :)