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.
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
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.