Make:

• HOW TO - Make fake barf!
• HOW TO - Make a USB remote control receiver
• How-to: Cast concrete planters using packing inserts
• DIY: UV Light Box
• The van that thought out loud
• DIY Automatic ball launcher for dogs made from an old scanner

Melts everything, including this guys retinas!

Please remember safety glasses.

I did this using a cheap $59 arc welder from homier. I used carbon gouging rods (used for cutting metal thats too thick for a plasma torches or gas torches) for the electrodes. Instead of a crucible I used two bricks that I hollowed out with an air hammer to hold the molten metal. The bottom has large area hollowed out to contain the molten metal. The other one is a lid with two channels for the electrodes. Its got to be about the cheapest way to melt metal for small castings. Without the lid I wasn't able to get the metal hot enough to pour into a mold thou. This is very dangerous and life threatening by the way. It has the potential to cause blindness, electrocution, burns,... to many ways to kill or permanently mame yourself doing this to list. Some things to note about this are the cheapo arc welder listed above came with a 220 volt euro plug that I had to cut off and rewire. I run it at its lowest (45 amp) setting for the greatest duty cycle(I wired it up to 110 once and it ran cranked all the way up to the 100 amp setting without the thermal protection tripping). The smallest carbon rods I found work best (1/4 inch). It also seem to help if I sharpen them and cut the copper coating off from the ends that are arcing. The carbons are kind of hard to find. I found them at the local farm and fleet store. My normal welding supplier did not carry them. The bricks do crack open after a while and drop the molten metal out so don't do this on a table while wearing flip-flops. My metal of choice so far has been rusty nails for small casts to turn in my lathe. All the rust seems to get pushed out of the molten metal and the castings seem to be good all the way through as far as I can tell. This is sort of a micro scale version of the way scrap steel is melted back down.

There just aren't enough bow ties in science these days.

TheThompsonFive: I miss Bill Nye!

Billy Nye was cool, but Beakmans assistant was a hottie. I think Bre should wear a bowtie for weekend projects.

Did one similar to this when I was 13 from a 1940s chemistry book...
Used a saltwater rheostat ; 2 lead sinkers in a petri dish with salt water!!
An old flower pot and carbons from some really old batteries.
Blew the fusebox a bunch of times, and my eyes still hurt! Heh.

I had that book!

I remember doing this as well. Per the book, I tore apart two D-cell batteries, removed the carbon rod from each, crimped each into a metal tube, used a terracotta flower pot for the crucible and a quick saltwater rheostat with washers for electrodes in the water. I remember the lightning bolts (arcs) jumping between those washers when the water got good and hot! Wasn't very useful but a lot of fun at the time! :) If you remember, that same book told how to make an x-ray machine from old radio tubes. Thank goodness my buddy and I didn't try that years ago or we'd still be glowing in the dark! LOL

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