The power factor (PF) of a device is a number between zero and one that represents the ratio between the real power in watts and the apparent power in Volt-Ampere (VA). A power supply that has a PF of 1.0 indicates that the voltage and current peak together (the voltage and current sine waves … Continue reading Power Factor Correction
Researchers at the Department of Energy’s Oak Ridge National Laboratory claim that recycled tires could see new life in lithium-ion batteries that provide power to plug-in electric vehicles and store energy produced by wind and solar. By modifying the microstructural characteristics of carbon black, a substance recovered from discarded tires, a team led … Continue reading New Battery Technology in the Form of Recycled Tires
An electrical switch is simply a device that starts and stops electric current by opening and closing the electrical circuit. In the simplest description, a switch has two conductive pieces, usually metal, called contacts, connected to an external circuit, that touch to complete (make) the contact, and separate to open (break) the circuit. This … Continue reading How to Make Your Own Wearable Switch
Arduino Pro Mini The Blinking top hat was created by a couple of do-it-yourselfers to give as a gift at their friends’ engagement party. As the hat is tilted it lights up with rotating effects. The blinking top hat combines white LED strips, a small Arduino Pro mini and an accelerometer to obtain the really … Continue reading Make a Blinking Top Hat
This beautiful Moonlit LED flower is simple and inexpensive to make right at home. We will show you how with our basic tutorial on how to sew this soft circuit flower. The first thing you will need to do is to cut, out of your fabric, the petals and a wrapper … Continue reading How to Make a Moonlit LED Flower
Making a scribbling machine is a great way to experiment with the erratic movement of an offset motor. Basically, a Scribbling Machine, is a motorized gadget that moves in erratic ways and leaves a colorful trail which traces its path. A scribbling machine is made from simple materials and demonstrates the erratic motion produced … Continue reading Making a Scribbling Machine
There are several different easy to create batteries that you can make inexpensively at home. A battery can be made when you place any two different types of metal into a conducting solution. Typical homemade batteries include sticking copper and zinc strips into a lemon or a potato. Zinc-air batteries are metal-air batteries powered … Continue reading Make Your Own Zinc-Air Cell
Lord Kelvin’s Thunderstorm is a type of electrostatic generator invented by British scientist William Thomson, better known as Lord Kelvin, in 1867. Kelvin referred to the device as his water-dropping condenser. The device uses falling drops of water to generate voltage differences by using electrostatic induction, which occurs between interconnected, oppositely charged systems. … Continue reading Lord Kelvin’s Thunderstorm
In physics, energy is defined as a property of objects, transferable among them through fundamental interactions, which can be converted in form but not created or destroyed. In comparison, power is the rate of doing work. It is equivalent to an amount of energy consumed per unit of time. Different forms of energy and … Continue reading The Difference Between Energy and Power
Electric charge An electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges, positive and negative. The positively charged matter are driven away from other positively charged matter. However, they are attracted to negatively charged matter. … Continue reading The Difference Between Electric Charge and Electric Current
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