Category Archive: Circuits

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 …

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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.

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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. 

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

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 …

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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 …

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