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ACTION AND USE OF CIRCUIT COMPONENTS - Coggle Diagram
ACTION AND USE OF CIRCUIT COMPONENTS
potential divider
divides voltage into smaller parts
Vout = Vin x (R2 / Rtotal)
variable potentiometer
uses variable resistor
acts like potential divider
can change output voltage
transducers
thermistor
input sensor and transducer
temperature-dependent resistor
less resistance at higher temperature
light-dependent resistor
input sensor and transducer
higher resistance at higher light intensity
capacitors
stores small amounts of electric charge
capacitance measured in microfarads
more charge stored with higher capacitance
used in time-delay circuits
relay
switch operated by electromagnet
normally open relay
switch is closed when coil is energized
normally closed relay
switch is closed when coil is not energized
diode
a device with very high resistance in one direction and very low resistance in the other
forward bias:
diode points in direction of conventional current
reverse bias:
diode points opposite to conventional current
can be used in a
rectifier
to change an AC current to a DC current
transistor
used to amplify signals and for switching
three terminals: emitter, base and collector
small current in one circuit can control a large current in another
arrow from base to emitter must be in the same direction as the conventional current
transistor has blocking current if no current travels from base to emitter
