Crystals can be used for electricity through the method of piezoelectric (mechanical energy discharge), of which quartz is a typical example. When the crystal is fixed and subjected to direct force by a permanent magnet, a certain amount of electricity can be released and detected. The piezoelectric method is widely applied in cigarette lighters and gas grill ignition buttons, where battery cell is no longer needed.
- Clip the insulated wire into two scrips with a wire stripper.
- Strip all ends of these two wires to expose the copper filament to about a half inch. If the wire is multiple-filament, wring the ends of the wires into separate coils.
- Weld each wire to the back of a electrode with an adhesive backing. If electrodes are unavailable, drop a glob of solder with the size of about half a dime onto one end of each wire.
- Press the adhesive backing of the electrode onto a flat part of the quartz crystal. If electrodes are unavailable, press the glob of solder onto the quartz crystal and fix it with two drops of glue. If glue and electrodes are all unavailable, wrap the wire tightly around a long exposed part of the crystal.
- Fix the other electrode onto the permanent magnet in the same way of fixing the electrode onto the crystal.
- Fix the other two ends of wire onto the electrodes of voltmeter (regardless of the polarity). Set the voltmeter to a low power of about 1V.
- Hit the crystal slightly with the magnet, then a spike will be present on the voltmeter. A electric current can be produced and stored successfully through continuous striking the crystal with the magnet.