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Basic Electronics
Requirement for a Complete Circuit
SourceBattery, Generator, AC Voltage source, Photovoltaics,
etc.Load
Light bulb, motor, buzzer, heater, LED, LCD, Digital Circuit, etc.
ConductorsSwitch
Slide, momentary, toggle
Energizer
+
_
Schematic Diagrams
+ 10V
Energizer
+
_
TERMS, SYMBOLS AND UNITS OF MEASUREMENT
Term Description Symbol Unit of Meas. Symbol
Charge Quantity of Accumulated Electrons Q Coulombs C
Voltage Electromotive Force E/V Volts V
Current Rate of Electron Flow I Amps A
Resistance Opposition to Electron Flow R Ohms Ω
Power Rate of doing Electrical Work P Watts W
Flow of Electrons in a copper wire
Using a Multimeter: Measuring Resistance
Using the Ohmmeter
1.Measures resistance in a circuit.2.The circuit must be “dead.”3.Choose the setting on the meter. 4.Insert the Red (+) test lead into the voltage/
connector on the meter. The black (-) test lead should be in the COM connector
5.If the component to be measured is mounted on a printed circuit board then disconnect one end of the component to be measured from the circuit.
6.Place the leads of the meter across (in parallel) the component to be measured.
Using a Multimeter: Measuring Voltage
Using the Voltmeter 1.Measures the electromotive force (voltage) between
two points.2. The circuit must be “live.”3. Choose the AC voltage or DC voltage setting on
the meter.4. Insert the Red (+) test lead into the voltage/
connector on the meter. The black (-) test lead should be in the COM connector
5. Place the leads of the meter across (in parallel) the component to be measured.
VV
Using a Multimeter: Measuring Current
Using the Ammeter
1.Measures electron flow (current) in a circuit. 2.The circuit must be “live.”3.Choose the AC amperage or DC amperage setting
on the meter.4.Move the red test lead from the voltage/
connector to the amperage connector on the meter.
5.Break the circuit and place the meter in series with the component to be measured.
A
ENGINEERING NOTATION 1012 109 106 103 100 10‑3 10‑6 10‑9 10‑12
____________________________________________Tera Giga Mega Kilo Base millimicro
nano picoT G M k ohms m μ n p
ampsvoltswattsSLL‑LSR
Quiz Time!!!!
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