LESSON 3 PREPARE AND INTERPRET TECHNICAL DRAWINGS
Definition of Terms
AC voltage - a voltage in which the polarity alternates
Anode - the positive electrode or terminal of a device. The “P” material of a diode
Bridge Rectifier - a circuit using four diodes to provide full-wave rectification. Converts AC voltage to a pulsating DC voltage
Calibration – used to adjust the correct value of a reading with comparison to a standard value
Color Code - set of colors used to indicate value of a component DC Power Supply - Set of colors used to indicate value of a component
Diode - a two terminal device that conducts in only one direction
Full Wave Rectifier - the rectifier that makes use of the full ac wave in both positive and negative half cycles
Fuse - a device in the current path that melts or breaks when current protective exceeds a predetermined maximum value
Half Wave Rectifier - a diode rectifier that converts AC to pulsating DC by eliminating either the negative or positive alternation of each input AC cycle Leakage - small undesirable flow of current through an insulator or dielectric
Light Emitting Diode - a semiconductor diode that converts electric energy into electromagnetic radiation at a visible and near infrared frequencies when its PN junction is forward bias
Output - terminal at which a component, circuit or piece of equipment delivers current, voltage or power Power Supply - electrical equipment used to deliver either AC or DC voltage Primary - first winding of a transformer winding that is connected to the source as opposed to secondary which is a winding connected to a load
PCB - insulating board containing conductive tracks for circuit connections
Rectification - process that converts alternating current to direct current
Rectifier - diode circuit that converts AC to pulsating DC
Regulated Power Supply - power supply that maintains a constant output voltage under changing load condition
Rotary Switch - electromechanical device that has a rotating shaft connected to one terminal capable of making, breaking a connection to one or more other terminals
Schematic Diagram - illustration of an electrical or electronic circuit with the components represented by their symbol
Secondary - output winding of a transformer winding that is connected to a load
Short Circuit - also called a short. Low resistance connection between two points in a circuit typically causing excessive current
Solder - metallic alloy used to join two metal surfaces
Soldering Iron - tool with an internal heating element used to heat surfaces being soldered to the point where the solder becomes molten
Substrate - mechanical insulating support upon which a device is fabricated
Switch - electrical device having two states, ON (closed) or OFF (open)
Test - sequence of operations intended to verify the correct operation or malfunctioning of a piece of equipment or system
Transformer - inductor with two or more windings
Troubleshooting - systematic approach to locate the cause of a fault in an electronic circuit or system
Volt-Ohm-Milliammeter - known as a multitester. A test equipment used to check AC, DC voltages, current in a circuit and resistance of any components out of the circuit
Anode - the positive electrode or terminal of a device. The “P” material of a diode
Bridge Rectifier - a circuit using four diodes to provide full-wave rectification. Converts AC voltage to a pulsating DC voltage
Calibration – used to adjust the correct value of a reading with comparison to a standard value
Color Code - set of colors used to indicate value of a component DC Power Supply - Set of colors used to indicate value of a component
Diode - a two terminal device that conducts in only one direction
Full Wave Rectifier - the rectifier that makes use of the full ac wave in both positive and negative half cycles
Fuse - a device in the current path that melts or breaks when current protective exceeds a predetermined maximum value
Half Wave Rectifier - a diode rectifier that converts AC to pulsating DC by eliminating either the negative or positive alternation of each input AC cycle Leakage - small undesirable flow of current through an insulator or dielectric
Light Emitting Diode - a semiconductor diode that converts electric energy into electromagnetic radiation at a visible and near infrared frequencies when its PN junction is forward bias
Output - terminal at which a component, circuit or piece of equipment delivers current, voltage or power Power Supply - electrical equipment used to deliver either AC or DC voltage Primary - first winding of a transformer winding that is connected to the source as opposed to secondary which is a winding connected to a load
PCB - insulating board containing conductive tracks for circuit connections
Rectification - process that converts alternating current to direct current
Rectifier - diode circuit that converts AC to pulsating DC
Regulated Power Supply - power supply that maintains a constant output voltage under changing load condition
Rotary Switch - electromechanical device that has a rotating shaft connected to one terminal capable of making, breaking a connection to one or more other terminals
Schematic Diagram - illustration of an electrical or electronic circuit with the components represented by their symbol
Secondary - output winding of a transformer winding that is connected to a load
Short Circuit - also called a short. Low resistance connection between two points in a circuit typically causing excessive current
Solder - metallic alloy used to join two metal surfaces
Soldering Iron - tool with an internal heating element used to heat surfaces being soldered to the point where the solder becomes molten
Substrate - mechanical insulating support upon which a device is fabricated
Switch - electrical device having two states, ON (closed) or OFF (open)
Test - sequence of operations intended to verify the correct operation or malfunctioning of a piece of equipment or system
Transformer - inductor with two or more windings
Troubleshooting - systematic approach to locate the cause of a fault in an electronic circuit or system
Volt-Ohm-Milliammeter - known as a multitester. A test equipment used to check AC, DC voltages, current in a circuit and resistance of any components out of the circuit