EVOLUTION OF ELECTRONICS Flashcards
Wrote about the attraction
of straw and dust to
fossilized tree sap called
amber + year discovered
Thales 600BC
Discovered that electricity
is produced when two
different metals are in
contact with moistened
cloth.
Allesandro Volta 1800
Discovered the force
between electrically
charged objects. and when
Charles Coulomb 1785
Determined that magnetic
field is present when
current flows in a wire. and when
Hans Oersted 1820
Determined the
relationship between
current and voltage in an
electric circuit. and when
George Ohm 1826
Discovered the correct
theory of electromagnetic
force. and when
Andrew Ampere 1827
Discovered the principle of
electromagnetic induction.
He invented the electric
motor. and when
Micheal Faraday 1831
Invented the incandescent
bulb. and when
Thomas Alva Edison 1879
Developed the first
practical invention in radio
telegraphy and received
the first trans-Atlantic radio
signal in 1901. and when
Guglielmo Marconi 1895
Discovered the electron. and when
Joseph John Thomson 1897
Invented the telegraph and
the code that bears his
name. and when
Samuel Morse 1832/1844
Invented the vacuum tube. and when
Ambrose Fleming and Lee
de Forest 1902
Invented the first visible
spectrum LED. and when
Nick Holonyak 1962
Invented the transistor. and when
John Bardeen, William
Shockley and Walter
Brattain 1948
Invented the integrated
circuit. and when
Robert Noyce and Jack
Kilby 1958
In electronics, the simplest circuit is formed by using a ____, a ____ and a ______ ______
wire
load
supply voltage
_______electronic components are components that do not generate
energy but can store or dissipate it. It includes resistors, inductors and
capacitors.
Passive
____ electronic components are components that rely on an external
source to control or modify electrical signals. It includes diode, transistor,
MOSFETs, etc.
Active
a passive component that limits the flow of current.
Resistor
measured in ohms, is the characteristic of resistor which determines how good the
resistor can oppose current flow
Resistance
are resistors whose resistances do not change when subjected to different conditions
Fixed resistors
are resistors that can
change its resistance. Usually, these types of resistors are rated according to its
maximum value.
variable type
are devices that can store electrical energy in the form of DC
voltage.
capacitors
The ability of capacitor to store electrical energy is called______and is measured in farad.
capacitance
has the same ability as in the capacitor, but instead of directly storing
the voltage, it is producing it by means of electromagnetic field, this is called induced
voltage.
Inductors
The ______ of the inductor determines how good an inductor can induce
voltage and it is measured in terms of henry.
inductance
is an example of inductor that
the student will use in their basic power supply design.
transformer
is used to construct the circuit without the need for soldering iron and
soldering lead. It is a solderless connection for the electronic components used in a
circuit.
Breadboard
an example of test instrument that can measure resistance, voltage
and current. It is also called volt-ohm-milliammeter.
Multimeter
a hand tool used to join two or more electronic components by
heating their metal terminals and melting soldering lead onto them.
soldering iron
are hand tools designed for gripping, bending, cutting and manipulating
various materials.
pliers
is a hand tool used to remove the insulation or protective coating
from electrical wires to expose the conductive wire.
wire stripper
often referred as desoldering pump, is used to remove the
solder and thereby removing the connection between terminals or electronic components.
desoldering tool
is used as the filler material in soldering process. It is a metal
alloy with a low melting point that is used to join two or more metal surfaces.
soldering lead
is a flat, rigid board made of non-conductive material that
serves as the base for mounting and connecting electronic components.
A printed circuit board
is a chemical compound used in making PCB designs.
The chemical dissolves the copper exposed on the PCB so the only remaining copper
will be the design which was covered by masking tape.
ferric chloride, FeC13,
Effect to your Body: Threshold of Sensation
Amount of Current, mA: ?
0– 1.5
Effect to your Body: Mild shock
Amount of Current, mA: ?
1-5
Effect to your Body: pain
Amount of Current, mA: ?
3-10
Effect to your Body: Can’t let go
Amount of Current, mA: ?
10-40
Effect to your Body: Respiratory paralysis
Amount of Current, mA: ?
30-75
Effect to your Body: Ventricular Fibrillations
Amount of Current, mA: ?
75-100
Effect to your Body: Heart stops beating
Amount of Current, mA: ?
250-300
Effect to your Body: Organ burns
Amount of Current, mA: ?
5000-6000
sources are voltages from an outlet or coming from the
transformer.) flows one way, then the other way, continuously reversing
directions.
Alternating Current (AC)
sources are voltages from a battery or power supply. a current that always flows in one direction.
Direct Current (DC)
The amount of current flow in a circuit depends on this. This are electrons are the electrons at the outermost layer of the atomic structure
valence electrons
are particles of matter that are not in motion, it is represented by the letter
symbol Q and is measured in coulombs (C)
Charge
particles of matter are in motion,
it is called____. measured in ampere
Current
formula for charge
Q = It
One ampere of current requires_____ number of electrons
6.25 x 10^18
The charge of each electron
1/6.25 x 10^18 = 0.16 x 10^-18 C
is a current flow that starts from the negative terminal
of the battery and ends to the positive terminal of the battery
electron flow
is the opposite of the electron flow.
conventional current
flow
the ability of the material to allow current flow and measured in
mho or siemens ( or S)
conductance (G)
Resistance is the______of conductance.
reciprocal
