Loop powered devices are modules and computer boards which are powered by the system they serve.

Piezoelectric drivers and piezoelectric amplifiers are power sources that provide the high voltage levels needed to drive other piezoelectric devices such as actuators, motors, transducers, and sensors

Signal isolators must be used when connecting grounded signal sources to grounded signal followers.

Specialty industrial process controllers are used in unlisted, specialized or proprietary applications.

Signal conditioner chips are data acquisition devices that refine sensor outputs so that they can be read by computer boards or other IC devices

Telephones and cell phones convert voice or other sound signals into a form that can be transmitted to another device that receives and reconverts the waves back into sound

Electrical current sensors measure AC and/or DC current levels.