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Why does every new electronic project have to begin with an Arduino or similar device? In any kind of radiation the electronics would be fried by the radiation. How about some good old electronics projects minus a computer!!
I would like you to know that at least in the United States, the 70cm Amateur Radio band extends from 420 to 450 MHz. Using the frequency 433 MHz in the U.S. requires an Amateur Radio Operator's License. If you put such a system together don't be surprised if letters from the Federal Communications Commission arrive or Amateur Radio Operators come knocking on your door!! Don't say we didn't tell you ahead of time!
My Dad was an antique dealer and restored almost everything for many years. He always used some sort of paste wax on metal items like the hammer head, and even the wooden handle. The wax works better if the steel is warmed first as it opens the pores of the steel and allows the rust preventative oils of the wax to penetrate into the metal. Sometimes even slighty preheating the items by briefly runnung the flame of a propane torch over the item works well. The wax lasts much longer to keep rust and corrrosion from forming on the tool. The old Johnson's Paste Wax, Butcher's wax or even paste car wax works well.
hmm. not as exciting as the black powder cannon, but it can be used inside the house. Might have to make one...
Good article, but I have to let you know that all torches are not blow torches, contrary to what the talking-heads of the news media would have you to believe. A blow torch is a totally different animal. It burn gasoline. In order to light it, you place a small amount of gas in a cup on the torch and flip a match in it. This resulting flame heats up the torch head to vaporize the gasoline in the burner. They are most unpredictable and fairly dangerous. I don't think they are even made any longer. What you are using more than likely if it has a disposable tank is a propane-type torch, although there are other gasses available to some of them to get more heat..
It is usually easier to find a nut or two the same size as the bolt, and run them both (2 works better as you can jamb one nut against the other) up past the length you want, then adjust the outside one back to the desired length and tighten one nut against the other. You cut the bolt using a vise or whatever, and then you have the nut to back off so that any damaged threads can be chased back into place. I sometimes run the nuts further up the threads following the cut and grind the bolt flat on the end with a small chamfer to enable the threads to start easier.
Very Well-done!! The same technique could be used on any curved piece on anything. I read somewhere that welding "is like sewing with fire!"
Great job! I have to admire you reusing that bed frame material. That stuff is so hardened it is despicable to try to drill or machine!
Sorry, but #12 wire is only good for 20 amperes of current, not 30. It would have to be #10 to do 30 amps. Nice outfit though and you have thought it through thoroughly and done it up very nicely. I auctioneer part-time and have thought about doing something similar for a mobile office/clerk station, with ability to sleep in it when necessary.
Mixing + Pouring Concrete
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Had to make one in Metals Shop in high School. We started with hex-shaped tool steel, heated it, hammered it into shape, then filed/polished it, reheated, tempered and hardened it. I lost mine somewhere along the way but it cut very well. Great project.
I wish Victorinox would make a set of Swiss Army lockpicks with a tension tool sliding in where the toothpick or tweezers go. I have 3 Swiss Army Tinkerers in various states of wear. Best darned knives I have ever used....
Simple Elegant Guitar Stand