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A stirling engine is an exceptionally efficient energy-extracting device that retrieves energy from the heat difference. It can easily be build from freely accessible materials and inexpensive tools. Any source of energy like sun, burning wood, candle or even the warmth of the hands can be used to run the device. Here is a step by step procedure to build a stirling engine.

The materials that will be needed for the project are as follows:

  • Coke canister
  • Coat hanger
  • Red bull container
  • Straight pins
  • Bolt
  • Washer
  • High-temperature glue
  • Silicon gasket
  • Balloon

Stirling Engine How to Build a Stirling Engine

In the first step, take the coke tin and cut it in such a manner that it becomes a hollow cylinder. Now, cut it into two halves. Take the bottom half and cut its sides and bend them to form the three-legged ring stand. Likewise, create the ring stand of the other half. For the pressure vessel, take another coke canister and cut off the top portion. This piece will form the bottom portion of the pressure vessel. For the top portion of the vessel, take yet another coke can and cut it approximately 2-inches from the bottom. In the bottom part of the vessel, drill a hole in the centre. Affix a bolt and steel plate on the inner side with the help of glue. For making the displacer, take red bull canister and cut in the same manner as the pressure vessel. Fix it inside the vessel and make certain that there is no leakage.

For making the crankshaft, use coat hanger. Cut the hanger into a straight rod that is bent to form a handle at one end. Insert the crankshaft into the hole punched on the sides of red bull can. Ensure that the handle moves freely. In the last step, cut the balloon to form the diaphragm that connects the crankshaft to the disc. It should be strong enough to endure heat and movement.

Stirling Engine 1 How to Build a Stirling Engine

Heat the stirling engine gently for 20 to 30 seconds. Push the flywheel tenderly; if is starts rotating on its own, then the project has been successfully completed, else some alterations have to be made. In order to ensure that the stirling engine keeps on extraction energy proficiently, constant cooling is essential. For this ice cubes should be place on the top the pressure vessel. Under no circumstances water should penetrate into the vessel. This is the only precaution that should be properly addressed.

Wind turbine, also called windmill, is a device that easily converts wind energy into electrical energy. Due the variations in the air pressure, the blades of the windmill move. Owing to the movement of the blades, the wind energy is converted into mechanical energy, which is finally transformed into electrical energy and used for running various home and office appliances.

The materials needed for building the wind turbine are plywood, ribbed cardboard, disk magnets, 3-mm dowel braces, ¼-inch circular dowels, 5-mm lead, 8-inch eye screws, 3-cm washers, and 28 gauge enamel magnet wire about 120-m in length. The tools required are screwdriver, scissors, compass, knife, measuring tape, white glue, electrical tape and voltmeter.

Wind Turbine How to Build a Wind Turbine

On a plain paper, draw a circle that is 12-incles in diameter. Cut out the circle and fold it to form a semi-circle. Cut through the folded end of the circle to obtain two halves. Place the two semi-circles in such a manner that rounded portions are not on the same side. Moreover, the top half should completely cover the lower half. Glue the two parts together, and use them to draw the design of the blades on the cardboard. The capacity of the windmill to harness wind energy is directly proportional to the number of blades. Thus, more blades will trap in more energy.

Take the plywood and on it draw a circle whose radius is 6-cm. Cut out the circle and drill a hole in its center.  About 8-cm below the hole affix a 30-cm high vertical post. At the bottom of this post attach a foot support.

Use an eye screw to attach a circular dowel to the horizontal frame. With the help of the cardboard and electrical tape, create a tube that is 20-cm long and 3-cm wide. Wrap roughly 200 coils around it, and be sure to leave 40-cm of coil at each end. Remove the twisted wire from the tube and secure it with electrical tape. From each end of the coil, remove 15-mm of enamel and test the current with the aid of a voltmeter. Make three more coils in this manner. Lay them side by side in such a way that all of them are in the same clockwise direction. Join the coils and glue them to the base of the wind turbine.

On the cardboard, draw a circle of radius 6-cm. Cut out the circle and punch a hole in its center. Through the center of the circle, draw a cross. On each of the four ends of the cross, place a washer. The disk magnet should be placed upon the washer in such a manner that the north side of the magnet should be away from the washer.

Wind Turbine 1 How to Build a Wind Turbine

Take a plastic bottle and create a plastic tube out of it by cutting its top and bottom. The radius of one side of the tube will be 6-inches. On this side, the blades should be pasted. Ensure that the blades are evenly fanned out and sealed at one end. Mount the tube on the vertical support created earlier. At the opposite end of the tube, punch a hole for the circular dowel. To this dowel, attach the cardboard with disk magnets. Make sure that the magnets face the coils that are placed at the base of the wind turbine. With this the windmill is ready for use.

Windmill is the most efficient way to harness wind energy. Due to the variations in the air pressure the blades of the windmill move, and this movement converts the wind energy into mechanical energy. The blades are connected to the shaft which transfers the mechanical energy to the generator where it is converted into electrical energy. The electricity generated is used for running different appliances at home and office.

A standard windmill has four crucial parts viz. blades, tower, nacelle and base. All these four components can either be built at home or bought from the market. Two things that should be kept in mind while building a windmill is that the tower should be able to reach above all the obstructions and the blades should move as freely as possible. In other words, the tower should be high enough to be able to take advantage of the wind and the blades should move with minimal resistance.

Windmill How to Build a Windmill

Plastic or wooden blades are ideal for the windmill because they are lightweight due to which they are able to move at the slightest change in the air pressure. The size of the blades depends upon the height of the tower. If the tower is 5-feet tall, then the blades should be approximately 1 to 3 feet in length.

The base of the windmill has to bear the weight of the blades, tower and nacelle. For this reason, it should be heavy, strong and sturdy. To be able to support 5-feet tall tower, the base should be at least 10-kg in weight and 18’’x18’’x18’’ in dimension. Concrete and wood are considered to be ideal for base. Sandbag can also be used.

As the tower has to withstand the weight of the blades and nacelle, therefore it should also be robust and resilient. Typically, it is made of plastic or wood. Nacelle is basically a gearbox that helps in the movement of the blades. In the place of nacelle, a simple shaft can also be used to connect the blades with the tower.

After all the requisite materials and tools have been collected, start building the windmill. However, before that, choose an appropriate location. The place should be on the windward side and it should have minimum number of obstacles.

On the idyllic location, install the base first. Thereafter, affix the tower, and lastly, set up the blades and nacelle. Ensure that the blades move freely. The windmill is ready to generate electricity from wind energy.

A hydro generator is essentially a machine that allows you to generate electricity though hydro or water power. It is in fact fairly easy to build a small hydro generator, and you will feel proud of being able to generate your own power source from nature. This is quite a popular method with some households, similar with the use of convertible solar energy. Some of the materials you’ll need for this DIY project include garden pipe, motor generator, water wheel, wire coils and light-emitting-diode (LED). This project applies a similar system that is used by larger hydro generators that transmit electricity supply to homes and commercial buildings. Using the materials, here are the steps on how to build a hydro generator.

(1) Water source is the main priority- it should be taken from a nearby reservoir or river. You need to determine the hydroelectric potential of the source before you construct anything else. Basically, the flow or movement of water creates electric power. That explains why waterfalls or strong, gushing rivers are good sources. Blades are rotated due to running of water. (2) Rotating wheel is then connected to AC generator. This helps to spin the rotor. Inside the wire coils, the rotor is attached to powerful magnets. The spinning of magnets cause electricity to flow in the wires set up earlier on.

Build a Hydro Generator How to Build a Hydro Generator

This literally shows that rapid movement of water is converted into electrical energy. The source of energy can be used for different purposes. Soon enough, you will need to pay less for electricity and be able to enjoy this newfound electric source. (3) To test the efficiency level of the generator, LED is used. It will light up when electricity is generated. These mini generators are useful for smaller environments. Water dams are built for the very same purpose, to convert water energy to electrical energy.

Cost of operating such a generator is much cheaper than using non-renewable sources such as coal or fuel (gas). Another advantage is that the supply of electricity can be transmitted to faraway places with the use of sophisticated wiring system. Listed here are some common steps on how to build a hydro generator. There are also other ways to build such a device, some using easy-to-find household products. Many science projects also employ a similar building method for their students, though it is less complex in nature. It is a good exposure because students can now build their own electricity generator.

Rearing your own chickens can be an intensive, yet highly rewarding, exercise in animal husbandry. If you’re rearing them for both meat and eggs, then you would know that getting your chickens plucked can be expensive if you get your butcher to do it for you. Likewise, buying a commercial chicken plucker can eat into your capital. Luckily, there is actually a way to know how to build a chicken plucker from scrap material you probably have lying around the compound.

The main body of the chicken plucker can be made from a plastic food-grade barrel. Failing that, just get a really clean plastic barrel and cut the bottom off of it. The bottom piece that you cut away should be saved to form the feather plate of your chicken plucker. The barrel that forms the plucker should be about 20 inches high, so cut the barrel down to size if you need to. The largest expense you’ll make when learning how to build a chicken plucker is when you buy the rubber fingers that are integral to the plucking process. You will need approximately 150 rubber fingers, which will cost $115-$120, depending on where you obtain them.

 How to Build a Chicken Plucker

Drill holes near the bottom of the barrel that are wide enough for the rubber fingers to fit snugly. I would suggest drilling 2 rows, with the 0.75-inch holes about an inch apart. You may need to use a lot of elbow grease to fit the rubber fingers through these holes, although it would help to bevel the exterior of each hole before pulling the fingers in while standing inside the barrel itself.

To make the feather plate, drill holes 0.75-inch wide and 2 inches apart into the barrel bottom that was cut off earlier. Drill the holes in concentric circles about 1.5 inches apart, like a bull’s-eye, before fitting the rubber fingers into the holes. The plastic material may feel slightly flimsy, and can be reinforced by screwing it to 0.75-inch plywood or even a wheel bearing. The frame used to hold the chicken plucker can be fashioned to requirements from scrap lumber.

To power the plucker, you will need a motor. Anything from 0.5-0.75 horsepower will do, but a 0.3 horsepower can also be used in conjunction with a 10-1 transmission ratio. This is to ensure that the feather plate turns at 450 rpm. The last step in knowing how to build a chicken plucker is to fit the barrel into the scrap-lumber frame, screwing it in to secure it. The feather plate centered at the bottom has to be coupled with the transmission before the motor is attached, in turn, to the transmission. The motor, too, has to be secure to the frame before the plucker can be switched on.

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