The document discusses different types of switches used in electrical circuits. It describes the basic elements of a circuit including a load, complete path, and power source. It then explains the different types of switches categorized by the number of poles and throws, such as single pole single throw (SPST), single pole double throw (SPDT), double pole single throw (DPST), and double pole double throw (DPDT). Examples of each type of switch are provided along with diagrams and animations. Other switch styles like toggle, slide, rocker, and momentary contact switches are also covered.

1. Switches
Electronics 1
CVHS

2. Basic Elements of a
Circuit
• Three Essential Elements
– Load
– Complete Path
– Power Source
• Additional Elements
– Control Device
– Protective Device

3. Electricity Generation
• Six Methods Used to Produce Electricity
– Chemical
– Magnetism
– Heat
– Friction
– Light
– Pressure

4. Basic Switch Function
• To open and close a circuit
–Open (no connection)
–Closed (connection)
• Control device
–Does not consume power

5. Schematic Terms
• Pole- what the switch
armature is connected to
Pole Throw
• Throw- the closed position of
the switch

6. Single Pole, Single Throw
• SPST
• 1 pole, 1 throw
• Example- room lights

7. SPST Animation

8. Single Pole, Double Throw
• SPDT
• 1 pole
• 2 throws, 2 closed positions

9. SPDT Animation

10. Double Pole, Single Throw
• DPST
• 2 poles

11. Double Pole, Single Throw
• Not 2 throws because of
mechanical connection
• Both armatures make contact at
same time- one closed position

12. DPST

13. DPST Animation

14. Double Pole, Double Throw
• DPDT
• 2 poles
• 2 separate closed positions

15. DPDT Animation

16. Switch Styles
Toggle Slide

17. Switch Styles
Rocker Push On/Off

18. Other Switches
• Momentary contact switches
–Push button switches
• Rotary switches

19. Momentary Contact
• Push Button Normally Open
• PBNO
• Red in color

20. PBNO

21. Momentary Contact
• Push Button Normally Closed
• PBNC
• Black in color

22. PBNC

23. Rotary Switches
• Used for complex circuits
• Can have multiple throws

24. Rotary Switch
• Example- Stereo input selector

25. #1) ?P?T

26. #2) ?P?T

27. #3) ?P?T

28. #4) ?P?T

29. #1) 3P1T

30. #2) 2P5T

31. #3) 3P2T

32. #4) 3P3T

33. 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?