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Basic Electronics Laboratory
An Introduction
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What we're going to learn today:
What is an electronic circuit?What kind of power is needed for these projects?What are the fundamental principles of electronics?What are the basic electronic components used in DC analog circuits?How do these principles combine to make interesting things?
We're going to make some of those things, and you can take the kit, and the projects home with you.
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Class Parts List
Components
Breadboard Wire (single strand)Carbon resistancesCapacitors (ceramic, electrolytic, polysterene) Diodes LEDsPhotoresistorTransistors
Equipments
Power SupplyFunction generatorDigital MultimeterCathode Ray Oscilloscope
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About parts
Symmetric vs AsymmetricPolarizedPhysics and chemistry in a tiny packageExplain Data Sheets
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What is electricity?
What kinds are there?What can it do?What are the dangers?
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What is a circuit?
Combination of electronic parts, wires connected between power sources. It's like a physical program. It's also like setting up dominoes in sequence.
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What is a breadboard?
What are they good for?Creatings, organizing, and prototyping a circuit.
Literally started out as a bread board with nails.
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What are LEDs?
Light Emitting DiodesDiode Symbol + Arrows for lightPoints to ground
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Hello World for a Circuit
Light and LEDParts:BatteryResistorLED
Why:Power SourceAn LED will light up when enough voltage is supplied but can also burn out if too much is allowed to pass through. The resistor will limit the voltage to prevent damage.
Do:Connect Battery, Resistor, LED
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LED Circuit
1 LED Plus resistorWhy have a resistor?Current, limiting.
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Series circuit example
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Parallel Circuit example
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Parallel and Series Circuit Example
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Fundamental Parts
ResistorCapacitorWireDiodesLight Emitting Diodes (LED)BatteryTransistorsMotorsThey each have a physical property that interacts with electricity. When put in combination various actions occur.
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What are resistors?
Resistors provide a specific amount of resistance to a path in a circuit or wire. Ohm's law is used to calculate the properties related to resistance.
Ohm's Law: I = V/RI = Current measured in AmpsV = Voltage measured in VoltsR = Resistance measured in Ohms
Resistors are color coded.
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Variable resistor: The potentiometer
Voltage dividersTry out the different pots.
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RGB LED
Try resistors out in various combination to make different colors. Experiment by adding potentiometers to the leads.
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LED and Photoresistor
Photoresistors change their resistance by the amount of light detected.
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What are capacitors?
Capacitor is two separated charges.Known charge up time.Know discharge time.Two major kinds• Electrolytic, asymmetric, bipolar• Ceramic, symmetric
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Capacitors in series
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Capacitors in Parallel
They can provide energy, however briefly.They can smooth out a signal.
Attach the battery briefly to fill the capacitor.
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Capacitors in series and parallel
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Make a voltage regulator
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Turn things on and off with a:
WireButtonPhotoresistorHall Effect SensorRelayTransistorButtonSwitch
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Transistors
NPN Transistor
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Hall Effect Sensor
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Reed Switch Example
A reed switch is closed when a magnet is in close proximity.It is symmetric so it can placed either direction.
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Tilt ball switch
Emergency on/off if project tips over.
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Motors
Try changing the directionof the diode.What happens?