Here are general instructions for making a simple flat solar collector: Step 1: Gather materials and tools: - A metal-plastic pipe or buy a ready-made heat exchanger made of pipes (for example, copper). - Styrofoam or other insulating material to retain heat. - Board of oriented strand board (OSB) to create a body. - Polyethylene film or acrylic glass to cover the collector. - Tools: saw, drill, rifle, screws, insulating tape, thermometer and other necessary equipment. Step 2: Construction of the collector body: - Cut out the shape of the body from the OSB board. You can make it rectangular or square, depending on your needs and available materials. - Assemble the case using screws and thermal insulation tape to ensure good thermal insulation. Step 3: Making the heat exchanger: - If you do not have a ready-made heat exchanger from tubes, make it from a metal-plastic pipe. Create a spiral structure from the tube that will pass through the manifold. Step 4: Styrofoam Placement: - Place the foam in the middle of the collector body around the heat exchanger. It will help keep the heat in the collector. Step 5: Collector Cover: - Cover the upper part of the collector with polyethylene film or acrylic glass. It should be transparent so that sunlight can penetrate into the collector. Step 6: Connection: - Connect the inlet and outlet pipes of the heat exchanger to the coolant circulation system, for example, to the heating system in the house. Step 7: Testing and Tuning: - After assembling the collector, check it for leaks and air leaks. Perform test runs to ensure that the collector is working properly and transferring heat to the coolant. Remark: - Depending on your needs, it may be necessary to add a pump and thermostat to optimize the system. - The results of solar collectors can vary greatly depending on geographical location, weather conditions and the efficiency of the collector you are building. Remember that this is only a general guide and it is best to consult a professional if you have no previous experience in building solar collectors. ... https://www.youtube.com/watch?v=IMFB0scIc9U

Mini-machine for the production of chain-link netting. How to make a chain-link net with your own hands. A simple device for making a chain-link net at home. A simple project for the workshop. Anyone who has an angle grinder, a drill, or a welding machine can make such a machine on their own. The craft is made from scrap metal parts. ... https://www.youtube.com/watch?v=jwzeODGBsBA