Making Falle Style Wrenches

[muddassarusa]

Excellent post.

Just wondering though, why not use a drill bit, drill two holes next to each other and use a file to smooth them together?

Has that been tried and not worked so well? None the less, I will have to try my hand at it tomorrow.

Very good tut Vitti.

Good job nice work carry on man

[RevDisk]

Here's another tutorial, from a guy that uses it to make valves for engines: http://www.aardvark.co.nz/pjet/makevalves1.pdf

Only thing I can add from my own experiences. Temperature matters. Trying to etch outdoors during the winter can be quite fun... Higher amps, faster and cleaner it goes. Do not use a cheap Radio Shack knife switch, BTW. Melted one using a motorcycle battery.

[Shini]

I have been having some success with this method over the last week or so.

Rather than damage any of the chargers I have around the house as they all are currently being used by their respective devices I just added more wire to the end of the output plug.

I used a laptop power supply pack with a single round hollow pin that connects to the computer. I used a digital multi meter to find which of the outside or inside was positive or negative and went from there, to use it again with the laptop all I had to do was unwrap the wires I wound around and pushed into the hollow section of the plug. The output from the adapter was a nice 19 V at 4.2 amps so a lot safer than the mains output though as AC that would have been useless for anything other than blowing fuses.

[neptix]

I know most of you understand this, but as an electrical engineer, I feel the need to make it very clear...
This is not a job for wall current. Best case, you trip a breaker, worst case, you are electrocuted to death while your house burns down around you. Either way, no picks.

"Wall wart" transformer/rectifiers are probably your best bet. Most wall warts have built in protection, so even if you do short them out, you usually just have a dead wall wart. They cost a buck at any flea market.

Car/moterbike batteries will work for heavier projects, but be careful not to short them out. They don't have any protection, and a short from them can produce thousands of amps.

That being said, have fun and make awesome things. I will be

neptix

[Dpruente]

I do believe that the "reaction" with the tape adhesive, is actually a matter of physics. The thickness of the tape gives a little notch that the reaction chemicals sit in and concentrate themselves, instead of reacting and falling off like they do on the open area to be cut.