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Switches. Electronics 1 CVHS. Basic Elements of a Circuit. Three Essential Elements Load Complete Path Power Source Additional Elements Control Device Protective Device. Electricity Generation. Six Methods Used to Produce Electricity Chemical Magnetism Heat Friction

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Presentation Transcript
switches

Switches

Electronics 1

CVHS

basic elements of a circuit
Basic Elements of a Circuit
  • Three Essential Elements
    • Load
    • Complete Path
    • Power Source
  • Additional Elements
    • Control Device
    • Protective Device
electricity generation
Electricity Generation
  • Six Methods Used to Produce Electricity
    • Chemical
    • Magnetism
    • Heat
    • Friction
    • Light
    • Pressure
basic switch function
Basic Switch Function
  • To open and close a circuit
    • Open (no connection)
    • Closed (connection)
  • Control device
    • Does not consume power
schematic terms
Schematic Terms
  • Pole- what the switch armature is connected to

•Throw- the closed position of

the switch

Pole

Throw

s ingle p ole s ingle t hrow
Single Pole, Single Throw
  • SPST
  • 1 pole, 1 throw
  • Example- room lights
s ingle p ole d ouble t hrow
Single Pole, Double Throw
  • SPDT
  • 1 pole
  • 2 throws, 2 closed positions
d ouble p ole s ingle t hrow11
Double Pole, Single Throw
  • Not 2 throws because of mechanical connection
  • Both armatures make contact at same time- one closed position
d ouble p ole d ouble t hrow
Double Pole, Double Throw
  • DPDT
  • 2 poles
  • 2 separate closed positions
switch styles
Switch Styles

Slide

Toggle

switch styles17
Switch Styles

Push On/Off

Rocker

other switches
Other Switches
  • Momentary contact switches
    • Push button switches
  • Rotary switches
momentary contact
Momentary Contact
  • Push Button Normally Open
  • PBNO
  • Red in color
momentary contact21
Momentary Contact
  • Push Button Normally Closed
  • PBNC
  • Black in color
rotary switches
Rotary Switches
  • Used for complex circuits
  • Can have multiple throws
rotary switch
Rotary Switch
  • Example- Stereo input selector
review
Review
  • What are the three basic parts of a circuit?
  • What else can a circuit include?
  • What are the six sources of energy?
  • What is the main function of a switch?
  • What is the difference between a throw and a pole?
  • What other types of switches are available?