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# Lesson 1.1

### Introduction to Electronics

TermDefinitionExample
Analog A way of representing some physical quantity, such as temperature or velocity, by a proportional continuous voltage or current. An analog voltage or current can have any value within a defined range. An example of an analog device is a thermometer.
Breadboard A circuit board for wiring temporary circuits, usually used for prototypes or laboratory work. Circuits can be built using breadboards.
Conventional Current The direction of current flow associated with positive charge in motion. The current flow direction is from a positive to negative potential, which is in the opposite direction of electron flow. The positive and negative symbols show the conventional current of the circuit.
Current A movement of electrical charges around a closed path or circuit. Current is measured in amperes.
Digital A way of representing a physical quantity by a series of binary numbers. A digital representation can have only specific discrete values. An example of a digital device is a digital clock.
Digital Multi-meter A piece of test equipment used to measure voltage, current, and resistance in an electronic circuit. Digital Multimeters can do the tasks of voltmeters, ammeters and ohmmeters.
Engineering Notation A floating point system in which numbers are expressed as products consisting of a number greater than one multiplied by an appropriate power of ten that is some multiple of three. 100 to the power of 3 is supposed to be 10 to the power of 6 in engineering notation.
Kirchhoff’s Current Law (KCL) The algebraic sum of all currents into and out of any branch point in a circuit must equal zero. KCL is used in a parallel circuit.
Kirchhoff’s Voltage Law (KVL) The algebraic sum of all voltages around any closed path must equal zero. KVL is used in a series circuit.
LED Light-emitting diode. An electronic device that conducts current in one direction only and illuminates when it is conducting. When current is passing, the LED is turned on.
Ohm Unit of resistance. Value of one ohm allow current of one ampere with potential difference of one volt. Ohms
Ohm's law In electric circuits, I=V/R. In digital electronics, Ohm's law is mainly used.
Parallel Circuit One that has two or more branches for separate current from one voltage source. Voltage is the same through all resistors in a parallel circuit.
Resistance Opposition to current. Unit is the ohm. A type of a resistor is a light bulb.
Resistor Color Code Coding system of colored stripes on a resistor to indicate the resistor's value and tolerance. Without a resistor color code, the amount of resistance can be hard to identify.
Scientific Notation Numbers entered as a number from one to ten multiplied by a power of ten. Scientific Notation is used to make numbers more easier to read and write.
Series Circuit One that has only one path current. Current is the same through all resistors in a series circuit.
Simulation Testing design function by specifying a set of inputs and observing the resultant outputs. Simulation is generally shown as a series of input and output waveforms. A simulation can be used to prove a theory.
SI Notation Abbreviation of System International, a system of practical units based on the meter, kilogram, second, ampere, Kelvin, mole, and candela. SI Notation can be very helpful to handle very large and small numbers.
Solder Metallic alloy of tin and lead that is used to join two metal surfaces. Solder is basically a metallic glue.
Soldering Process of joining two metallic surfaces to make an electrical contact by melting solder (usually tin and lead) across them. When soldering there is a lot of heat.
Soldering Iron Tool with an internal heating element used to heat surfaces being soldered to the point where the solder becomes molten. The soldering Iron is usually very red when soldering.
Created by: robinihov