Serial port controlled AC power outlet strip

Serial port controlled outlet strip.

Another old project. This is a modified power strip that allows to control each of its six outlets independently via a serial port. The outlets are controlled with TRIACs. There is no heat sinking so it can only handle relatively low power loads. I had no problems using it with 60W lamps, but the original purpose was to automatically turn off my soldering irons (25-50W), which very often I left connected, hot and forgotten for days in some cases. This site has great prices www.safetytechnology.org/home-protection/motion-activated-alarms/electronic-barking-dog/.

I've posted the schematics, and firmware source code.

Desoldering a QFP SMD IC using a candle.

Old NIC with just removed RTL8019.

Never do this. I mean it. It is dangerous, it is wrong, you may get hurt, your tools, your stuff or your house may be damaged. I did this because I didn't have proper tools at hand and it was a do or die weekend situation. You must use proper air soldering and desoldering tools. In Youtube you can find excellent videos on how to do this in a better manner.

If you want to see what is what I did, read on...

Small LED dot matrix sign

Small LED dot matrix sign

This (5 rows by 28 columns) LED dot matrix digital sign was designed and built during November 2000 as a hobby and was my second ever microcontroller project. After building and programming it I left it working continuously for about 21 months, after that it was shelved and I only powered it occasionally when somebody wished to have a look at it.

Further down in this article are the schematic and its firmware source code.


Welcome to www.eercz.com!

My name is Rolando, I live in La Paz - Bolivia (it's in South America, in case that you never heard of it). I'm an electronics engineer and I run a small company.

I have been working in a variety of interesting hobby projects, some have been gathering dust for a long time, so I thought that it would be a good idea to try to post articles about those in a website, to share with like minded people.

There are nice things ranging from basic to advanced and I'll be writing about the best of what I can show little by little.

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