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  • Stop using Ferric Chloride etchant!  (A better etching solution.)

    Best to do your mixing in a glass/pyrex container, and then transfer it to the plastic storage after it has cooled.The last time I made enchant, I did it outdoors in the middle of an adjacent field, in glass, and with a face mask because you don't want to be breathing that hydrogen, and the chance of an errant spark/flame is less likely.When you're done making it, you can slowly funnel it into a plastic jug inside of a bucket (in case it tips over while you pour it). This stuff will make any metal in the room rust quickly if left open, or is stored in an improper container. I have my last batch stored in a yard/pool container with a flip top lid, along with the leftover acid I used to make it.One day I tossed a few scraps of stainless steel in the box for some reason or another. When...see more »Best to do your mixing in a glass/pyrex container, and then transfer it to the plastic storage after it has cooled.The last time I made enchant, I did it outdoors in the middle of an adjacent field, in glass, and with a face mask because you don't want to be breathing that hydrogen, and the chance of an errant spark/flame is less likely.When you're done making it, you can slowly funnel it into a plastic jug inside of a bucket (in case it tips over while you pour it). This stuff will make any metal in the room rust quickly if left open, or is stored in an improper container. I have my last batch stored in a yard/pool container with a flip top lid, along with the leftover acid I used to make it.One day I tossed a few scraps of stainless steel in the box for some reason or another. When I came back several months later, most of the stainless steel is rusted on the surface. There isn't much plating left.Before I started storing the acids outside in their own container, the vented caps would allow the acid into the air, and my tools were rusting like crazy from the open air.

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  • Disassembling a CD/DVD reader and reusing its parts

    I always disassemble them for some reason. I've got a box full of misc dc motors that came out of printers, cd/dvds, and laser units, among other electronic parts.Interested in taking some off of my hands, get in touch with me, and we'll work something out. I'd like to get rid of them all by the box at the moment actually because I have too many other things going to put them to use.

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  • Make 4 Useful Things From 9V Dead Battery

    Not really a response to you, but your comment inspired my thought.I don't recommend it, but I've put my finger right on a hot main to prove a point with a live 470v main. If you are not grounded on your body elsewhere, and have good boots, it's not going to kill you. IF YOU ARE NOT GROUNDED. That's the important part. Ground out, and you're not going to be a happy camper if you survive.I am an ex-electrician. I can attest to working live wires, and surviving, yet having them blow up when the tip hits ground due to incorrectly labeled breakers. I've been shocked more times than I can count. The worst feeling of them being an overloaded, and unbonded neutral wire (yes, the white wire can shock you on older or inproperly installed services that are not up code).No matter how well y...see more »Not really a response to you, but your comment inspired my thought.I don't recommend it, but I've put my finger right on a hot main to prove a point with a live 470v main. If you are not grounded on your body elsewhere, and have good boots, it's not going to kill you. IF YOU ARE NOT GROUNDED. That's the important part. Ground out, and you're not going to be a happy camper if you survive.I am an ex-electrician. I can attest to working live wires, and surviving, yet having them blow up when the tip hits ground due to incorrectly labeled breakers. I've been shocked more times than I can count. The worst feeling of them being an overloaded, and unbonded neutral wire (yes, the white wire can shock you on older or inproperly installed services that are not up code).No matter how well you trust your partner, always test the wires with your meter/ticker. Always question your ticker. They're handy, but I've had several that would chirp on dead wires, and not chirp on live ones. When in doubt, get the meter out.

    I wouldn't say it hurts, but it is unpleasant. To me, it's like tasting something very bitter.

    For me, it was a paper clip in a socket. I stuck it in, and watched it vibrate. Touched it, and the circuit popped. I was maybe 4.

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  • How to vacuum seal a mason jar

    As far as sealing the tube to remove the valve, I would reckon that one could use a very hot pair of pliers to crimp the hose melting the end together. Then you could cut off the tube above the crimp.Another option would be to make the valve flush with the lid by turning it down sideways so that it is as near flush as possible. Then you could glue on a ring to the lid that allows the jars to be stacked.If you get some funding to do it, it would be easy enough to design a lid that could be mass produced all in one piece of plastic to simplify it. Just hook it up to your vacuum pump/syringe, and viola. Vacuum sealed jar.As far as storing any food stuffs, it is highly recommended by food safety professionals that one should not store food in a dry pack jar. This could be useful for a...see more »As far as sealing the tube to remove the valve, I would reckon that one could use a very hot pair of pliers to crimp the hose melting the end together. Then you could cut off the tube above the crimp.Another option would be to make the valve flush with the lid by turning it down sideways so that it is as near flush as possible. Then you could glue on a ring to the lid that allows the jars to be stacked.If you get some funding to do it, it would be easy enough to design a lid that could be mass produced all in one piece of plastic to simplify it. Just hook it up to your vacuum pump/syringe, and viola. Vacuum sealed jar.As far as storing any food stuffs, it is highly recommended by food safety professionals that one should not store food in a dry pack jar. This could be useful for all sorts of dry supplies though.

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  • How to salvage a DVD Drive For Free Parts

    Me too. I picked the habit up from my grandfather. He had a cabinet about 8'x6'x3' (HxWxL) with shelves full of coffee cans loaded with salvaged hardware at his shop. His garage was like a parts warehouse. We almost never had to buy a bolt, nut, screw, etc.If you look at that those motors, hardware, brackets, as money saved... you're rich in a way. One mans trash is another mans treasure. Not to mention the melt down value of all of it if ya ever have to leave it behind and can't find a buyer.Those guys that own those huge junkyards are worth millions in scrap metal alone. But an intact part can worth so much more than an ingot. Especially when that part is no longer manufactured.

    If you do not need the face of the unit, stick a flat screw driver in the front of the tray, and pry. It'll snap right off, and then you can pop the face of the unit off before disassembling it. I've found that to cut down on my disassembly time significantly.

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