Cars & Driving
- noun a solid-state electronic device that allows the passage of an electric circuit in one direction only, used in alternators to change alternating current to direct current for charging the battery
- A two-terminal active electronic device consisting of an anode and a cathode, and which passes current only in one direction. Most diodes are semiconductor devices, and generally consist of a pn junction. Diodes have various applications, including their use in rectifiers, filters, sensors, modulators, and amplifiers. Examples include LEDs, Gunn diodes, read diodes, and point contact diodes.