Studied by 6 peopleElectrical symbol
This is a visual symbol that represents a particular type of electrical component in a wiring diagram or similar schematic
Wire
This is a single, usually cylindrical, flexible strand or rod of metal.
Connected wire
This represents the connection of two conductors.
Unconnected wire
This represents two unconnected wires/conductors.
Input Bus Line
This represents a bus for input or incoming data.
Output Bus Line
This represents a bus for output or outgoing data.
Bus Line
This represents a number of conductors joined together to
Terminal
This represents a start or end point
Switch
This is a small control for an electrical device which you use to turn the device on or off
Push button (Closed)
This switch is initially in ON state.
Push button (On)
This switch is in ON state when the button is pressed otherwise it is in OFF state
SPST
(Single-pole single-throw) This acts as ON/OFF switch. Poles define the number of circuits it can be connected to and throws defines the number of positions that a pole connects.
SPDT
(Single pole double throw) This switch allows the current to flow in any one of the two directions by adjusting its position.
DPST
(Double Pole Single Throw) This switch can drive two circuits at a time.
DPDT
(Double Pole Double Throw) This can connect the four circuits by changing the position.
Ground
It is equivalent to theoretical 0V and is used as zero potential reference. It is the potential of perfectly conducting earth.
Signal Ground
It is a reference point from which the signal is measured.
Chassis Ground
It acts as a barrier between user and the circuit and prevents electric shock.
AC Supply
This represents the AC supply in the circuit
DC Supply
This represents the DC power supply, it applies the DC supply to the circuit.
Constant current source
It is a dependent current source. Usually depends on other sources (voltage or current).
Constant voltage source
It is a dependent voltage source. Usually depends on other sources (voltage or current).
Controlled current source
It is a dependent voltage source. Usually depends on other sources (voltage or current).
Single Cell Battery
This provides supply to the circuit.
Multi-cell battery
Combination of multiple single cell batteries or a single large cell battery
Sinusoidal generator
Represents the sine wave generator
Pulse generator
Represents pulse or square wave generator
Triangular wave
Represents triangular wave generator
Capacitor
This is a device that stores electrical energy in an electric field.
Non Polarized Capacitor
Non-polarized capacitors are big in size with small capacitance. They can be used in both AC and DC circuits.
Polarized Capacitor
Polarized capacitors are small in size but have high capacitance. They are used in DC circuits. They can be used as filters, for bypassing or passing low frequency signals.
Resistor
This is an electrical component that opposes the flow of either direct or alternating current, employed to protect, operate, or control the circuit
Fixed resistor
It is a device that opposes the flow of current in a circuit.
Rheostat
It is a two terminal variable resistor. Generally used in tuning circuits and power control applications like heaters, ovens, etc
LDR
They are also called as Photo Resistors. They are generally used in light sensing applications
Diode
This is an electrical component that allows the flow of current in only one directions
PN Junction Diode
Allows the current to flow only in forward bias condition. These diodes can be used in clipping and clamping circuits , as rectifiers in dc circuits etc.
Photodiode
Detects the light energy and converts it into current or voltage by a mechanism called photoelectric effect.
Zener diode
In forward bias condition, it acts as normal diode and allows current. It also allows current to flow in reverse bias condition when the voltage reaches a certain break-down point.
LED
Light emitting diode is similar to PN junction diode but they emit energy in the form of light instead of heat.
Inductor
These are essentially coils of conduction wire; they store magnetic energy in the form of a magnetic energy in the form of a magnetic field generated by the current in the coil
Iron Core Inductor
These are used as substitutes to ferrite core inductors. Ferrite core or Ferromagnetic inductors have high permeability and require air gap to reduce it. Iron powdered core inductors have this air gap integrated.
Ferrite Core Inductor
Core material, in this type of inductors is made of ferrite material. These are mostly used to suppress the interference of electromagnetic waves.
Variable Inductor
Movable ferrite magnetic core variable inductors are most common. The inductance is varied by sliding the core in or out of the coil.
Transistor
A semi conductor device for amplifying, controlling, and generating electrical signals.
Transformer
It is the basic element that transfers energy in one circuit to the other circuit through electromagnetic induction.
Screwdriver
These are hand tools specifically designed to insert and tighten, or to loosen and remove screws.
Slotted Screwdriver
This is used to drive or fasten negative slotted screws
Phillips Screwdriver
This is used to drive or fasten positive slotted screws. It is a screwdriver that could take greater torque and could provide tighter fastenings.
Jeweler's Screwdriver Set
This is a set of small screw drivers composed of slotted and Phillips screwdrivers
Allen Screw Driver/Wrench
This could be in the shape of a screw driver or a wrench. Its function is to drive screw with hexagonal slot head.
Stubby Screwdriver
It comes in either standard or philips screw driver with short shank or blade and a shorted handle used to turn screws in tight space where standard screw driver cannot be used.
Soldering iron
This is a device for applying heat to melt solder in attaching two metal parts
Soldering Tool Stand
This is a place where the soldering iron is placed during usage
Desoldering tool
This is used in removing soldered wires and components on printed circuit boards for troubleshooting and repair purposes.
Long nose
This is used for holding, bending, and stretching the lead of electronic component or connecting wires
Side cutter
Is a wire-cutting pliers, though they are not used to grab or turn anything, but are used to cut wires
Wire stripper
This is a pair of opposing blades much like scissors or wire cutters.
12V Mini Drill
Is used to bore or drill holes in the printed circuit board (PCB) with sizes from 1/32" - 1/16".
Portable electric drill
This is used for boring hole(s) in plastic or metal chassis with the used of drill bits having 1/6" to approximately 1/4"
Metal files
These are hand tools having a series of sharp, parallel ridges or teeth
Flat file
This is a type of metal file that is parallel in width and tapered in thickness' they are used for flat surfaces and edges.
Half round file
This is a type of metal file that is tapered width and thickness, coming to a point and is narrower than a standard half round and used for filing inside of rings.
Round file
This is a type of metal file that is also called rat-tail file which is gradually tapered and used for many tasks that require a round tool, such as enlarging round holes or cutting a scalloped edge
Utility knife
This is a common tool used in cutting various trades and crafts for a variety of purposes
Hacksaw
This is used for cutting metals.
Magnifying glass
(Auxiliary tool) This is a convex lens which is used to produce a magnified image of an object.
Paint brush
(Auxiliary tool) This is made of bristles set in handle, used for cleaning dirty parts of a circuit or an object.
Volt-Ohm-Milliammeter
It is an equipment that combines three functions: as a voltmeter that measures both ac and dc voltages; an ohmmeter that measures resistance; and milliameter that measures small amount of dc current
Oscilloscope
An oscilloscope (commonly abbreviated CRO, for cathode-ray oscilloscope, or scope)
Signal generator
This is a device that produces simple wave forms.
Conductors
These are the materials or substances which allow electricity to flow through them.
Insulators
These are the materials or substances which resist or don't allow the current to flow through them.
Silver
This is best conductor of electricity
Glass
This is the best insulator as it has the highest resistivity
Semi Conductors
These are substances with properties somewhere between conductors and insulators
Doping
This is the process of deliberately adding very small amounts of impurities or foreign substances to an otherwise pure substance
Dopants
This is what the impurities that are added to a pure substance is called
Intrinsic semiconductor and extrinsic semiconductor
Semiconductors can be classified as these two
Intrinsic semiconductor
Semiconductor in pure form is know as this
Extrinsic semiconductor
When we add an impurity to pure semiconductor to increase the charge carriers then it becomes an?
N-type
Type of extrinsic semiconductor na may excess electron
P-type
Type of extrinsic semiconductor na may kulang na electron therefore nagkakahole
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