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Multiplexed LED Driver for RGB LED Bar Graph

 by ktmglen ¦  Mon Jul 24, 2017 1:52 pm ¦  Forum: Projects ¦  Topic: Multiplexed LED Driver for RGB LED Bar Graph ¦  Replies: 0 ¦  Views: 564

I’m just sharing this project of mine in case any body else is still trying to figure out how to drive the Sparkfun RGB LED bar graph. A few months ago, I purchased one of the common-anode 48-segment RGB LED bar graphs from Sparkfun. It has 144 LEDs arranged into a 16 x 9 matrix. Unfortunately, 16 x...

Re: How to get ISE working on Win 10 w/ Mojo

 by ktmglen ¦  Thu Jul 20, 2017 10:54 am ¦  Forum: FPGA's ¦  Topic: How to get ISE working on Win 10 w/ Mojo ¦  Replies: 2 ¦  Views: 2632

New ISE 14.7 update for Windows 10 from Xilinx: ... a-p/780272

Re: LED Matrix Driver

 by ktmglen ¦  Thu Jul 20, 2017 10:15 am ¦  Forum: Projects ¦  Topic: LED Matrix Driver ¦  Replies: 1 ¦  Views: 610

Check out the TPIC6B595 from TI. Eight 150mA outputs per chip. I built a 16 x 9 matrix bar graph driver for the SparkFun RGB LED bar graph using two of them. If you use my design, the Arduino will need to scan the matrix continuously and you may need bigger PNP transistors than I used. Details on my...

Re: DRC error, 0.008" trace smaller than 0.0081000002

 by ktmglen ¦  Sun Nov 11, 2012 5:14 pm ¦  Forum: BatchPCB ¦  Topic: DRC error, 0.008" trace smaller than 0.0081000002 ¦  Replies: 15 ¦  Views: 9024

Yep, I'm seeing that error today too. I submitted gerbers that I created back in 2008 for a design that passed DRC back then with 8 mil traces again today. It failed with the same error message you're seeing. I rebuilt the Gerbers from the PCB design files thinking maybe the gerbers suffered from so...

DRC bot down?

 by ktmglen ¦  Mon Sep 03, 2007 6:29 pm ¦  Forum: BatchPCB ¦  Topic: DRC bot down? ¦  Replies: 4 ¦  Views: 2218

I uploaded a new design today. The DRC bot failed the design and returned two empty text files and no images. I uploaded an old design that I know passes DRC. The DRC bot failed this design too. It again returned two empty text files and no images. Anybody else experiencing this problem today? Is th...

 by ktmglen ¦  Fri May 04, 2007 10:32 am ¦  Forum: BatchPCB ¦  Topic: DRC-bot problem ¦  Replies: 9 ¦  Views: 3159

Yep. My emails came through too.

DRC bot down?

 by ktmglen ¦  Thu May 03, 2007 7:59 pm ¦  Forum: BatchPCB ¦  Topic: DRC-bot problem ¦  Replies: 9 ¦  Views: 3159

I'm having problems with the DRC bot too. I uploaded my design several times this evening and have yet to receive a response.