Diesel II Chapter 9-Circuit Control Devices
Zener diode
a type of diode that behaves like a typical silicon diode up to a precise threshold called a Zener point. After it reaches the Zener point voltage, the diode conducts in both directions
rheostat
a variable resistor constructed of a fixed input terminal and a variable output terminal, which vary current flow by passing current through a long resistive tightly coiled wire
Potentiometer
a variable resistor with three connections-one at each end of the resistive path, and a third sliding contact that moves along the resistive pathway
capacitor
a circuit-control device made up of two plates separated by the insulated material
light-emitting diode (LED)
a diode that produces light in different colors depending on the doping material used in its manufacture
photodiode
a diode that will forward bias only when light strikes it
organic light-emitting diode (OLED)
a light-emitting diode that uses carbon-based semiconductor material
N material
a material with a movable negative charge
P material
a material with a movable positive charge
photoresistor
a semiconductor-type of resistor in which resistance decreases as light intensity increases
reverse bias
a situation in which a diode blocks current flow
forward bias
a situation in which a diode conducts current
negative temperature coefficient (NTC) thermistor
a thermistor in which resistance decreases as the temperature increases
positive temperature coefficient (PTC) thermistor
a thermistor in which resistance increases as the temperature increases
bipolar transistor
a transistor that combines either two P or N materials with a single P or N-type material forming PNP or NPN transistors
NPN transistor
a type of bipolar transistor with two blocks of N material and one block of P material
PNP transistor
a type of bipolar transistor with two blocks of P material and one block of N material
Zener point
the voltage at which a diode will conduct current in both directions instead of just one
