Category Archive: EDA

Aug 16

Altium Design Security Advisory

After troubleshooting a problem I was having with the supplier links in Altium Designer, I recently found that, for at least one of the supplier links (Mouser), your login credentials are being passed in clear text.  Even better, they are in XML that clearly tells anyone watching what they are.  Altium has been notified of …

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2016/08/altium-design-security-advisory/

Mar 26

Pro Tip: Moving Multiple Component Primitives in Altium Designer

Sometimes you have a design where you don’t want to make a new footprint, but need to move a certain track or via 10 mil one way… for 30 copies of the same footprint.

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2016/03/pro-tip-moving-multiple-component-primitives-in-altium-designer/

Jan 01

Lighting the LEGO Salt Lake Temple

LEGO Salt Lake City temple on display at the Harold B. Lee Library at BYU.

2015 was a busy year.  The project that I had the most fun with was a bit off the beaten path compared to what I normally do.  This started off as a fun project for a friend.  It started off with, “I have this LEGO project I need to put LEDs in, can you help …

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2016/01/lighting-the-lego-salt-lake-temple/

Jan 01

Gotcha with the TI TCA6408A

The TI TCA6408A is a wonderful little chip when you need a few more I/O. It’s simple to program and use… so why did pressing the button attached to one of the pins cause the chip to reset? Read on to find out.

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2015/01/gotcha-with-the-ti-tca6408a/

Jun 05

These are not the bits you’re looking for

I’ve noticed recently that the number of bits available in an ADC is slowly creeping up.  That makes me excited… until I look at the system accuracy. 

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2013/06/these-are-not-the-bits-youre-looking-for/

Jan 10

Compact ATX Breakout Board

It sucks when you need 12 VDC and your power supply just died.  Previously we made an ATX breakout board to turn an ATX power supply into a fixed voltage bench DC power supply.  Here we present a board that is designed to be smaller and for use as a backup.

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2011/01/compact-atx-breakout-board/

Oct 22

Debug adapter for eZ430

For those of you who do prototyping with the eZ430 or eZ430-RF boards, this may be of interest.  It’s a debug adapter that you can put inline to make use of  a logic analyzer or other test equipment easier.  It expands out to 0.1″ spacing posts from the 0.05″ spacing used in the eZ430 connectors. …

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2010/10/debug-adapter-for-ez430/

Oct 01

ATX Power Supply Breakout Board

How many of you have or know of someone who has an old computer just sitting in the closet gathering dust. How many of you would like to have a multiple output bench power supply? Do you need an extra +12V DC power supply for your CB, ham shack or office? What we have here …

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2010/10/atx-power-supply-breakout-board/

Aug 18

The Dirty Truth about USB device Charging

3D Charging circuit layout

How many devices do you have that charge over USB?   How many devices require you to do something special, or have a special adapter to do it? The last few cell phones I’ve had have USB micro or mini ports to charge from.  I figure I can take a USB A Male to USB …

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2010/08/the-dirty-truth-about-usb-device-charging/

Jul 22

Altium Designer Overbar or Overline

While trying to move to a new EDA package, Altium Designer, I had a really hard time finding out how to put a overbar, or overline on top of a pin designator. This is usually used for active low signals. In Eagle PCB you just put an exclamation in front of the signal, or around …

Continue reading »

Permanent link to this article: http://blog.curioussystem.com/2009/07/altium-designer-overbar-or-overline/