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Communication Signals
Fox Valley Technical College Appleton, WI Communication Signals Basic Circuits
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of A Simple Electric Circuit
Pictorial Diagram of A Simple Electric Circuit Battery Lamps Wire Conductor Current Flow + - Voltage Source
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A Schematic Diagram for the Simple Circuit
VS Lamps Battery Or DC Voltage Supply PL1 PL2
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Hardware Pictorial and Schematic of a
Closed Circuit Using a SPST switch for control Closed Circuit Path => Current Flows V I + - Closed Switch Off On
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Hardware Pictorial and Schematic of an
Open Circuit Using a SPST switch for control Broken Circuit Path => NO Current Flow V + - Open Switch Off On
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Example: Pictorial of a SPDT switch controlling two lamps
2 1 Switch + -
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Example: Schematic of a SPDT switch controlling two lamps
1 2 V + -
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Switch Symbols NCPB NOPB SPST-NC SPDT Break-Make SPST-NO PB
DPST DPDT Single-pole rotary (6-position)
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Typical Mechanical Switches
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Construction View of a Typical Toggle Switch
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Symbols for Ground Chassis Ground AC DC
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A Simple Circuit Schematic
Using Ground Symbols I + - 12 V 0 V Ground Symbol
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Schematic Symbols Introduced So Far
Battery Resistor Potentio- meter Rheostat Grounds Fuse Circuit Breaker Lamps SPST-NO SPST-NC NOPB NCPB SPDT Break-Make PB T A V Ω Rotary Switch DPST Ammeter Voltmeter Ohmmeter Thermistor Photo Resistor DPDT
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Watch the video clip and see if you can tell what kind of circuit this is!
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Series Circuit VS IS +V1− +V2− + V3 − +V5− +V6− V4 One path for current. So all components have the same current through them. But components have different voltages consistent with the voltage – current relationship for each type of component.
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Watch the video clip and again, see if you can tell what kind of circuit this one is.
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Parallel Circuit + VS − I1 I2 I3 I4 I5 One voltage source. So all components have the same voltage across them. But the components have different currents consistent with the voltage – current relationship for each type of component.
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Series-Parallel Circuit
VS Most circuits are a combination of series and parallel circuits.
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