WANTED: Cheap dot-matrix LEDs

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chessman
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WANTED: Cheap dot-matrix LEDs

Post by chessman » Fri Feb 14, 2003 5:47 pm

I am wanting to buy some Dot-matrix LED displays for cheap, does anybody have anything?<p>~Kyle

rionredinger
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Re: WANTED: Cheap dot-matrix LEDs

Post by rionredinger » Sun Feb 16, 2003 5:00 pm

Would you be willing to use old dot matrix printers, and tear them apart so you can get what you need out of them? Or do you want just the LED's? If you want the dot matrix printers let me know and I can get them for you. You will have to pay shipping of course.

Chris Foley
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Re: WANTED: Cheap dot-matrix LEDs

Post by Chris Foley » Mon Feb 17, 2003 11:21 am

Could you provide more information? Matrix size (e.g. 5X7), color, display height, single- or multi-digit, &c. Also quantity needed. Thanks.

chessman
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Re: WANTED: Cheap dot-matrix LEDs

Post by chessman » Mon Feb 17, 2003 11:50 am

Chris Foley:<p>all the specifics of the displays really depend on price. The application is for an animated sign board display for my senior project in school.<p>Quantity needed is 10, color is red or green, matrix size is 5x7 or 5x8, I would prefer display height of 2" or so, but again, it will all depend on price. It doesn't matter between single or multi digit, but if 5 multi-digit displays are cheaper than 10 single-digit displays than I'd do it that way.<p>Please email me at [email protected] to get the fastest response.<p>
latirobotics:<p>Thanks for the offer, but I'm really only after the LEDs. Plus, if I ever do need to rip into a dot-matrix printer I have a spare one in the attic that I could use. Thanks anyway though.<p>Thanks everyone,
~Kyle

Chris Foley
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Re: WANTED: Cheap dot-matrix LEDs

Post by Chris Foley » Tue Feb 18, 2003 3:27 am

Sorry - can't help you with 10 of these. There are better deals out there, but you might want to either try Jameco (surplus components that usually work), or if you're really doing the churchmouse thing, buy LEDs by the bushel and build what you want out of discrete LEDs on 10 scraps of perfboard (see post WANTED - Red LEDs in Hundred Quantity). Jameco has several 2" displays for $4.95 each, and also has a small one for $1.95. You might want to try that one. Here's the link:<p> Jameco #11890 $1.95 ea.
http://www.jameco.com/jameco/Products/ProdDS/118906.pdf
This spec sheet will show you how to wire one up if you're rolling your own.
The important thing is to get something in quickly.
Cardinal Rule #2 of Engineering: Hurry Early!<p> Happy hunting.<p>[ February 18, 2003: Message edited by: Chris Foley ]</p>

chessman
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Re: WANTED: Cheap dot-matrix LEDs

Post by chessman » Tue Feb 18, 2003 8:30 am

Thanks for the replies, I chose to go the individual LED route - much more impressive looking to see 500 LEDs than 10 displays :p

bodgy
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Re: WANTED: Cheap dot-matrix LEDs

Post by bodgy » Tue Feb 18, 2003 12:07 pm

Youll be saying something else after you've finished soldering 500 of them :D <p>colin
On a clear disk you can seek forever.

chessman
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Re: WANTED: Cheap dot-matrix LEDs

Post by chessman » Tue Feb 18, 2003 12:50 pm

Good thing I have a couple months to solder them all :cool: <p>Besides, where's the fun in using displays anyway??

rionredinger
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Re: WANTED: Cheap dot-matrix LEDs

Post by rionredinger » Sat Feb 22, 2003 11:07 am

let me know how many you burn up with the soldering gun/iron/pencil.

L. Daniel Rosa
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Re: WANTED: Cheap dot-matrix LEDs

Post by L. Daniel Rosa » Sat Feb 22, 2003 12:25 pm

Kyle,

L. Daniel Rosa
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Re: WANTED: Cheap dot-matrix LEDs

Post by L. Daniel Rosa » Sat Feb 22, 2003 12:31 pm

Kyle,<p>Did you already arrange for some PCBs for this? If so the soldering could be pretty easy. I don't know if a solder pot is available to you, but it will answer your needs.<p>Dan

chessman
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Re: WANTED: Cheap dot-matrix LEDs

Post by chessman » Sat Feb 22, 2003 9:31 pm

Dan,<p>No, I don't have a PCB for it, I'm debating between point-to-point wiring and wire-wrapping.<p>Even with a PCB, I don't have a solder pot, although the process would still be extremely simplified.<p>~Kyle

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