Building a Simple CircuitBuilding a Simple Circuit

A Demonstration of voltage A Demonstration of voltage and current.and current.

Are electronics so Are electronics so complicated?complicated?

Electronic devices are more easily Electronic devices are more easily understood by knowing certain understood by knowing certain fundamentals.fundamentals.• VoltageVoltage• CurrentCurrent• Ohm’s LawOhm’s Law• Capacitors, resistors, and diodes.Capacitors, resistors, and diodes.

VoltageVoltage

What is voltage ( V ) ?What is voltage ( V ) ?• Voltage is amount of water you have.Voltage is amount of water you have.• Batteries have voltage.Batteries have voltage.• Bigger the battery, bigger the voltageBigger the battery, bigger the voltage

CurrentCurrent

What is current ( I ) ?What is current ( I ) ?• Current is the amount of water Current is the amount of water

flowing in the circuit.flowing in the circuit.• When a circuit goes bad or gets hot it When a circuit goes bad or gets hot it

is because there is too much current.is because there is too much current.

Ohm’s LawOhm’s Law

Why do I always hear about Ohm’s Why do I always hear about Ohm’s Law ? Law ? • Voltage, current, and resistance are Voltage, current, and resistance are

all proportional to each other.all proportional to each other.• V=I x R.V=I x R.• Voltage = current x resistance.Voltage = current x resistance.

CapacitorsCapacitors

What are What are capacitors ?capacitors ?• Capacitors are Capacitors are

devices that store devices that store charge.charge.

• Bump in the circuit.Bump in the circuit.– The water has to The water has to

build up to go over build up to go over the bump.the bump.

ResistorsResistors

What are What are resistors ?resistors ?• Resistors slow the Resistors slow the

current down. current down. • Current = Current =

Voltage/resistance.Voltage/resistance.• Pegs in the board.Pegs in the board.

– The more pegs you The more pegs you put in the board the put in the board the harder it is for the harder it is for the water to go through.water to go through.

DiodesDiodes

What are Diodes ?What are Diodes ?• Diodes only let Diodes only let

current pass in current pass in one direction.one direction.

• Glass door in the Glass door in the board.board.– Water can only go Water can only go

forward and not forward and not backward.backward.

Play with it !!!Play with it !!!

Build your own Circuit !!!Build your own Circuit !!!

Circuits in your houseCircuits in your house

Circuits are Circuits are everywhere.everywhere.• Take some time to play Take some time to play

with some electronic with some electronic devices in your house. devices in your house. But, always be very careful But, always be very careful to disconnect it from all to disconnect it from all electricity. Even small electricity. Even small amounts of current can amounts of current can kill. Be very careful when kill. Be very careful when playing with tv’s or playing with tv’s or computer monitors computer monitors because they can often because they can often carry a charge for many carry a charge for many hours.hours.

Who works with circuits ?Who works with circuits ?

Many jobs use electronics.Many jobs use electronics.• Electrical Engineers.Electrical Engineers.• ElectriciansElectricians• TechniciansTechnicians• Many othersMany others

Electronics is funElectronics is fun

I am an electrical I am an electrical engineer and use engineer and use electric circuits to electric circuits to solve real solve real problems.problems.

I love engineering I love engineering !!!!!!!!!!!!