Cristiano Maker

 I have an old kerosene pressure lamp, a Ditmar Maxim 520, but when I bought it, it come with some little cracks in the tank, so the first time I tried to turn it on, I noticed the kesorene leaking at the bottom. Searching in some forums for a possible solution, I have found a simple one: filling the cracks with tin solder. Here is a step by step if you also need to repair your pressure lamps: 1 - Identify all the cracks. 2 - With a dremel, open the cracks exposing the internal metal (make sure your tank is empty and dry of kerosene). 3 - With a torch and tin solder (the one used in electronics), fill the exposed metal crack with it. 4 - Test the pressure before adding kerosene. 5 - If the pressure keeps ok, you are ready to use your lamp again! Here is a small Youtube short video of the process: https://www.youtube.com/shorts/0442OXCgXjc  This is the final repaired tank:

 One of my hobbies is to build electronics projects, like metal detectors for treasure hunting. Usually electronics boards are hold inside a plastic or metal box. There both in the market, but usually they are not so cheap. One solution I thought about, was to build my own boxes using aluminum sheet as it is a soft metal. Although aluminum is soft, for the thickness I want to use (2mm) it is not so easy to bend it by hand, so I searched a bit how to make a tool to bend the metal with the less effort possible and with good results at the end, I came up with this, using only 3 pieces of wood, 2 screws with bolts and 2 hinges: This is known as a sheet metal brake, mine is simple, made of pine wood but I recommend you to use harder woods, specially if you need to bend metals harder tha aluminum. I think you can replicate one easily just by looking at the pictures above, so I'm not provinding any measurements but if you need, please write a comment below. For different sizes or formats ...

 As I work almost all day sitting down, there comes a time in the day when I get fed up of staying in that position for so long. So, I decided to make a simple and small desk that I can put on top of my main table and this is the result: This way I can simply add or remove the small table at any time I want to work standing up. Obviously there are in the market beautiful and comfortable standing desks, but at least here in Brazil, they are quite expensive so I decided to make mine with a few pieces of wood and 4 screws!

There is an amazing device to do exercises at home named "Power Twister" or "Power Crusher". I used it since my 10 years old. Below, there are some pictures with good exercises to do with it. The guide is in Portuguese but the images tell by themselves.

In my opinion, the Republic P-47 Thunderbolt is one of the most amazing planes of WWII. Some time ago, I found some interesting videos on Youtube showing how to fly this plane:

This is my homemade vacuum forming machine first try. I want to make a metal detector coil housing but I failed at the first time. May be due to using a too thick plastic (2mm polystyrene) or not enough temperature. The vacuum is obtained from a small vacuum cleaner (1400W) Here are some pictures of the device and a video. Next time I will try with a thinner plastic or other type (ABS). Part 2 - After some fails, the success! Well, today I will talk about the second try. I'm using the same type of plastic - polystyrene, 2mm but now I have a thermometer so I can measure it's temperature. I also added some screws to the frame, so I can prevent the plastic sheet from moving with the heat (because of expansion / contraction) and finally I got a good result as you can see below: I kept the plastic in the oven until it reached about 150 degrees celsius at the center of the sheet. Almost perfect. Not 100% because it seems I moved slightly the form out of place and it is not centered. ...