DIY shops

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Martin B.

Wind turbines. Enough to supply about 10.000 kWh or 10 MWh annually. "We built a 1000 watt wind turbine to help charge the battery bank that powers our offgrid home. It's a permanent magnet alternator, generating 3 phase ac, rectified to dc, and fed to a charge controller. The magnets spin with the wind, the coils are fixed, so no brushes or slip rings necessary." - MUCH cheaper. Just one foot. Designed to give to higher windspeeds, possibly by using a semi-flexible foot.

Splicing water bottles. For storing compressed oxygen to be used with ethanol/aluminium powder gas jet burner/furnace. Either this or a used propane tank.

Science

DIY vacuum chamber (a concrete cylinder with a couple of layers of glass for a window covering the top. Could also be used as a high-pressure chamber, if weight is added to the glass window.

an image of a vacuum pump with the words gravity powered vacuum pump on it's side

Sprengel Vacuum Pump: The most efficient vacuum pump ever?

Sprengel Vacuum Pump: The most efficient pump ever?

a white wind turbine sitting on top of a dry grass field

Monocrystalline Solar Panels

Solar Energy Panels

Wind Generator

50 Watt DIY Small Wind Turbine Kit

Wind turbines. Enough to supply about 10.000 kWh or 10 MWh annually. "We built a 1000 watt wind turbine to help charge the battery bank that powers our offgrid home. It's a permanent magnet alternator, generating 3 phase ac, rectified to dc, and fed to a charge controller. The magnets spin with the wind, the coils are fixed, so no brushes or slip rings necessary." - MUCH cheaper. Just one foot. Designed to give to higher windspeeds, possibly by using a semi-flexible foot.

a person is using a water filterer to make fuel from water

Free Energy Generator

HHO Generator - Water to Fuel Converter

there is a bottle that has been placed on the tree next to some water and trees

Splicing water bottles. For storing compressed oxygen to be used with ethanol/aluminium powder gas jet burner/furnace. Either this or a used propane tank.

two lines are connected to each other with arrows pointing up at the top and bottom

Primitive steam engine provides work, thus freeing up workers and reducing need for draft animals. The goal of any society is to minimize the number of people occupied with manual labour and maximizing the number of skilled craftsmen/artisans, scientists, artists etc.

a hand is holding a plastic object in front of a fish tank with water inside

Aquarium Decorations Ideas

How to Build an Acrylic Aquarium: 11 Steps (with Pictures)

Hydraulic robot arm. Replace the manual input with (electric motors, threaded rods and polarity reversing switches) and you can do it all using buttons, not levers (this allows greater distance between robot and operator). Mechanical advantage would have to be derived from the gear ratio. This would allow much more precise work too. Achieving a 360-degree rotation from linear movement: 2 gears where half rotation from big gear = 1 full rotation of small gear. Robotic Arm Diy, Hydraulic Arm, Robot Hand, Robotic Arm, Diy Science, Stem Projects, Diy Cardboard, A Robot, Science Fair

Hydraulic robot arm. Replace the manual input with (electric motors, threaded rods and polarity reversing switches) and you can do it all using buttons, not levers (this allows greater distance between robot and operator). Mechanical advantage would have to be derived from the gear ratio. This would allow much more precise work too. Achieving a 360-degree rotation from linear movement: 2 gears where half rotation from big gear = 1 full rotation of small gear.

welder working on an electronic device with flame coming out of the top and bottom

ETHANOL gas jet burner. A can with small hole in top & with a syringe needle placed over the hole. Can is filled with ethanol/veggie oil & placed on hot coals. Ethanol/oil vapors then ignited. Can is insulated. Smaller syringe inside bigger one delivers oxygen (preheated). Let air inside when can is cooling down to prevent implosion & let fuel "boil" for some time before igniting it to prevent explosion. For welding: a stoichiometric fuel/oxygen mix. For cutting metal: "too much oxygen" mix.

the gears are labeled in red and orange arrows pointing towards each other, with text describing how they work

Sliding mesh transmission.