4) Preventing breast cancer. Regular consumption of most alcoholic drinks increases the risk of breast cancer. However, red wine intake has the opposite effect, researchers from Cedars-Sinai Medical Center in Los Angeles found.
Voltages are produced by converting one form of energy into electrical energy. Mechanical energy can be converted into electrical energy (voltage and current) by moving a magnet or magnetic coil in proximity with a stationary coil, connected to an electrical circuit. A voltage can also be produced with a chemical reaction. Batteries and fuel cells convert energy in specially designed cells, where a chemical reaction causes a voltage to exist across two electrodes implanted at two different parts of the cell. A voltage can be produced by the interaction of light on a photocell. The photons of light interacting with atoms in the photocell, cause an electron to be ejected. The special design of the photocell causes this to occur in such a manner as to produce voltage across the cell. A voltage can be produced by subjecting a thermocouple to differential temperature. A thermocouple is a relatively simple device composed of two dissimilar metals, joined together at what is referred to as a thermal junction.
By connecting the crystal to the sound output of a device where a normal speaker would usually go, a radio's output for example (see diagram below), then the device will supply a varying voltage and the crystal's expansion and contraction will produce sounds waves.You now have a speaker!tepping up the voltage with a doorbell transformer. I first tried a doorbell transformer (see photos below), ones normally used to convert 120V to 12V (for example) for powering a doorbell from household power. Simply wire it backwards, the 12V side to the device's output and the 120V side to the piezoelectric crystal.