Category Archives: Uncategorized

Convert a propane tank to a Foundry

Interesting build. https://www.instructables.com/id/Aluminum-Foundry-1/

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Nice simple way to make stakes more visible

Basically you are heating it up, dipping it into powdered paint, then heating it a bit more to melt anything left.  Good idea overall.  Looks like it sticks better than regular paint (I typically just spray paint stuff like this). … Continue reading

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This is an interest spot welder

Not so sure I would hold the things like he does to do the welds. A Battery-Tab Welder with Real Control Issues

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Nice portable WiFi analyzer, but display is expensive

I like this build, and ironically most of the parts are pretty cheap but…the LCD used.  I did find one on ebay for under $8, but most go for $20 and up.  My 2 cents, if you can keep the … Continue reading

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OK this is the alarm clock for teenagers

Too funny, this alarm is one for teenagers to make sure they get up http://lifehacker.com/this-evil-alarm-clock-app-is-the-only-reason-i-m-awake-1793682623

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A pretty simple and portable Tesla Coil

OK this is a much easier build to do with kids.  I like how he uses nail polish to hold the wire in place. http://www.instructables.com/id/Slayer-Exciter-Circuit-Poor-Mans-Tesla-Coil/?ALLSTEPS

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Controlling stepper motors from command line

The author wrote an arduino sketch to control a stepper motor from a command line (via serial like port). A Command-Line Stepper Library with All the Frills  

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Nice build for demoing super capacitors

The video is pretty neat.  The author basically uses a handcrank generator to charge up 8(?) super capacitors.  That is used to replace a battery to crank a car up. Hand Cranked Generator Charges Supercaps, Starts Car   details here: … Continue reading

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Opensource POS (point of sale) systems

I didn’t realize how many there are now.  POS can be a very lucrative consulting area.  Most of the stuff I have seen is proprietary and expensive.  Apparently several companies have opensource versions you can now use instead. https://opensource.com/article/17/1/open-source-point-sale-system a … Continue reading

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Building another EMP from a bug zapper

Bug zappers seem to be popular for EMP based builds.  Here is another good writeup on one. http://www.instructables.com/id/How-to-Make-an-EMP-Jammer/?ALLSTEPS

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