[NCARC] Circuit board fabrication needed

[Glen Akins]

Hey, Rick,

If you can fit within the limits of the freeware version of Eagle, I'd 
recommend using Eagle and BatchPCB for low quantities of inexpensive 
prototypes. I like expresspcb.com too but boards with silkscreens can be 
more expensive with them than BatchPCB.

Links to Eagle and BatchPCB are at the end of the presentation I did on 
low-quantity prototypes at an NCARC meeting a few years back:

http://glenakins.com/ncarc/presentation.pdf

My current favorite technique for driving large quantities of small LEDs 
is the MAX6971ANG+ from Maxim. It will drive up to 16 channels with the 
current set by a single resistor. Datasheet available here:

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/4907/t/al

-Glen

scomind at aol.com wrote:
> Hi Rick,
>
> Hopefully, your project is experimental rather than commercial: The LM3914 was discontinued by National in 1999, but you can still find them at surplus dealers.
>
> Have you tried laying out a board with ExpressPCB (www.expresspcb.com)? It's really fun, and the free software lets you draw schematics and do the layout on a Windows PC.
>
> 73,
> Bob
>
>
>
> Bob Schmid, WA9FBO, Member
> S-COM, LLC
> PO Box 1546
> LaPorte, CO 80535-1546
> 970-416-6505 phone
> 970-419-3222 fax
> www.scomcontrollers.com
>
>
>
>
> -----Original Message-----
> From: Rick Coate <ricksco at comcast.net>
> To: ncarc at mailman.qth.net
> Sent: Tue, Dec 15, 2009 10:13 am
> Subject: [NCARC] Circuit board fabrication needed
>
>
> Electronic board fabrication needed:
> I am looking for someone to build a couple of circuit boards for me 
> sing LM3914 dot-bargraph display drivers to drive some large LED 
> argraphs.  These can be built using prototype boards, or as an option, 
> reating a couple of photo etched  circuit boards.  I would like to 
> iscuss options.
> If interested, please contact me at  ricksco at comcast.net
> Thanks
> Rick  Coate
> 0RSC
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