Drum heaters are used to heat containers of viscous materials.

Power supplies are devices that produce AC or DC power.

DC to AC inverters are used for converting direct current (DC) into alternating current (AC).

Power line network components use existing electrical power lines as carriers for data communications signals.

Diode lasers use light-emitting diodes to produce stimulated emissions in the form of coherent light output.

Darlington transistors (Darlington pairs) are semiconductor devices that combine two bipolar transistors in a single device.

Aluminum and aluminum alloys are lightweight, non-ferrous metals with good corrosion resistance, ductility and strength.