Transformer
- step up or down an AC voltage
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Rectifier
- converts AC to DC
- Bridge rectifier contains 4 separate single diode rectifiers
- Diode – electronic component that lets current flow in one direction only
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Solenoid
- used to hold valve opened or closed
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Relay
- uses current from one circuit to switch on or off current in another circuit
- Solid state relay – has no moving parts
- Mechanical relay – electromechanical device
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Capacitor
- stores electrical charge
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Thermistor
- electrical resistor
- whose resistance is rapidly varying function of temperature
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Thermocouple
- two dissimilar metals whose magnitude is dependant upon the temperature
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