paulba@sail.LABS.TEK.COM (Paul T. Barton) (12/21/90)
A long time ago ... there was a schematic in some electronics
mag using the 5x7 led matrix display (TIL305) for a 'Match-Box Oscilloscope'.
Anyone remember any of that stuff or what mag or what issue ?
Paul Taylor Barton CSNet: paulba@sail.LABS.TEK.COM
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HOME: 8120 S.E. Lake Road #4, Milwaukie, OR. 97267-2311, (503)-659-9417scotta@hpcuhd.HP.COM (Scott Anderson) (12/22/90)
/ hpcuhd:sci.electronics / paulba@sail.LABS.TEK.COM (Paul T. Barton) / 12:02 pm Dec 20, 1990 / > A long time ago ... there was a schematic in some electronics > mag using the 5x7 led matrix display (TIL305) for a 'Match-Box Oscilloscope'. > Anyone remember any of that stuff or what mag or what issue ? I could swear that it was Popular Electronics back when the LED bar display drivers (3914???) first came out (early 80s would be my guess).
cgordon@vpnet.chi.il.us (Crash Gordon) (12/27/90)
>Author: [Robert Mokry] >improvement that I kept thinking about but never built would be to >have only a one-dimensional row of LED's and somehow move them in >space to produce the 2-D field. Actually, someone's already doing this to produce a CGA display that's 3/4 X 3/4 inches (or so). It hangs out in front of your face on an eyeglass-frame type of thing (or headband?) The image is superimposed on whatever you're looking at, kinda like a heads-up display. They use 200 red LEDs, and a Piezo crystal to sweep horizontally. I think it's called "Private Eye." ----------------------------------------------------- Gordon S. Hlavenka cgordon@vpnet.chi.il.us Disclaimer: Yeah, I said it. So what?
mcginnis@kuhub.cc.ukans.edu (12/29/90)
>>improvement that I kept thinking about but never built would be to >>have only a one-dimensional row of LED's and somehow move them in >>space to produce the 2-D field. I once used an Infrared Scope with a viewer that used a vertical column of stationary L.E.D.'s for a screen. When one looked through the eyepiece one was looking at a rotating cylinder with 5 or 6 flat mirrors mounted on it. As the cylinder rotated the observer saw the vertical L.E.D. column scan horozontally. Obviously the intensity of each L.E.D. was kept in sync with the horoz scan rate due to cyliner rotation. This provided a very adequate image. Simple controls allowed one to correct for small errors in synchronization.