Category Archives: DIY Project

Small Portable Wind Turbine

Small Portable Wind Turbine GeneratorWind energy offers clean, abundant electricity and has become one of the fastest growing sources of energy around the world. This Small Portable Wind Turbine is a good example to learning about this technology.

This small wind turbine is made by high quality, low start torque, customized Mini DC Motor. It now uses a 15” long propeller that performs better in all wind conditions. These units are more versatile than other wind turbines currently on the market. (more…)

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How to use PVC pipe to make wind turbine blades

Nowadays, DIY own Wind Turbine is more and more popular. It's a really cool creations that you put all parts together. Building your own wind turbine have lots of fun.

We can use the PVC pipe to make wind turbine blades, because the PVC pipe is very a cheap and accessible materials.

The blade size depends on the generator selected. Larger is not always better. A wind turbine with 2 blades will turn faster than a turbine with 6 blades. A wind turbine with 6 blades has more power to turn a larger generator.

Below is an example design of a one piece (two blade) PVC wind turbine propeller. This design may be adapted with more turbine blades to fit a 3 blade or even 5 blade turbine configuration setup.

First of all we want to quarter the pipe. Now drawing straight line and measuring on round surfaces is hard, so the best method is to get a large sheet of paper. If you wrap the sheet tightly around the pipe you get a straight line round the pipe.

If you line one edge of the paper with this line you can get straight lines going down the pipe. With the paper wrapped round the pipe you can mark the circumference. Then you can fold the paper in half and mark half way round the pipe. Then in half again and get quarters of the pipes. With these methods you should be able to draw good straight lines all over the pipe dividing it lengthways into quarters.

Now for each of our four quarters we want to do two things
1) Cut out a rectangle from the base about 5 cms in, so we can easily attach it to whatever we want to. Before you do the cut, drill a hole in the corner to improve the structural integrity of the material. Once the hole is drilled cut the rectangles out being careful not to cut past the hole.
2) Cut from the high tip of the base to the point.

One of the most difficult parts of making your own wind turbine is producing turbine blades. Wind turbine blades go through enormous stresses and must be made to quite exacting tolerances if they are to balance and not send destructive vibrations through your wind turbine resulting in a catastrophic failure of your wind turbine.

In strong winds the flexibility of the PVC blades is useful as it takes some of the energy out of the wind preventing the wind turbine generator from excessive spinning (Overrun) and being damaged. Obviously you need to take care to ensure that the blades cannot bend back far enough to hit the wind turbine mast.

Individual wind turbine blades can be cut out of the pipe using a jigsaw or hacksaw blade, or a one piece pair of blades can be made.

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Chocolate-powered racecar

Fueled by leftover chocolate and with components made from carrots, potato starch and flax, the world's first sustainable Formula 3 racing car has a top speed of 135 miles per hour and can go from zero to 60 in 2.5 seconds.

Sound nuts? Not yet — brake pads made from cashews are still under development.

Meet Lola, the England's University of Warwick's blend of muscle and eco-friendliness and the world's first racing car retrofitted with renewable and sustainable materials.

Researchers from the British university showed off their prize possession at the Massachusetts Institute of Technology's (MIT) energy conference in Boston.

"She's incredibly green, taking materials that would otherwise have ended up in a landfill. It lets people engage with recycling without the finger-wagging," said Kerry Kirwan, one of the car's designers at the university.

"The public has really taken the car to its heart, because she's fun," he said.

Many of the car's components would more usually be found at a farmer's market — or in a trash bin, since most of the materials are actually industrial waste.

The 2.0-liter BMW engine has been converted to diesel from gasoline and configured to run on fuel derived from waste from chocolate factories or other plant-based oils.

Among Lola's other unique features is a radiator that converts ozone back to oxygen.

"It's a racing car that cleans up as it goes along," said Steve Maggs, another member of the design team.

The World First Formula 3 racing car took the university more than nine months to develop and cost around $200,000.

Kirwan said that the thinking behind the project was to find a way to really put recycled materials to the test.

"A lot of these technologies were a huge leap of application, something that shows the material under a really demanding application."

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How to Make a Solar Top Robot (2)

Now we start to make the mechanical part.

First we cut the board as an equilateral triangle. It should put three 2200uf capacitors and mini motor in the triangle circumcircle. See the below photo.


Pull the three clips straight, connect head and tail curved into a circle frame. Put the capacitors and mini motor in the circle. The solar panel install on the board.

The next step is welding the electronic part on the board. See the following photo.

Use the rest three clips bent into three fixed machine frame. Please note the clip in the motor screw holes in the end not be too long, otherwise it will hamper the operation of the mini motor.

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How to Make a Solar Top Robot (1)

Make a Robot is not easy, but also not very difficult. Here we start from an easy example – Solar Top. It has below function:

1. Rotator under sunshine

2. Come back if meet Obstacle

3. Keep stay in no sunshine place.

This is a simple automatic robot. It don't need people maintance. The life is depend on the environment and mechanical wear. The parts cost is very low.

The following is the parts you need:

1. Clip  6 units

2. Mini Motor  1 unit

3. capacitor  3 units

4. NPN Triode  1 unit

5. PNP Triode  1 unit

6. 2.2K resistance  1 unit

7. LED light   1 unit

8. Some Wire

9. Small Solar Panel( >4V, 10mA)    1 unit

10. Some Solder Wire

11. Perforated Board 1 unit

Below is the robot circuit diagram:

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