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# Lesson 1.1 Part A

TermDefinitionExample
Analog A way of representing some physical quantity (temperature or velocity) by a proportional continuous voltage or current. An analog voltage or current can have any value within a defined range. The clock on the wall is "Analog".
Breadboard A circuit board for wiring temporary circuits. Used in prototypes or lab work A cutting board with grid pattern holes for testing electronics.
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 current of a river flowing away from a waterfall.
Current A movement of electrical charges around a closed path or circuit. A rivers current.
Digital A way of representing a physical quantity by a series of binary numbers. A digital representation can have only specific discrete values. The clock on a cell phone is digital.
Digital Multi-Meter(DMM) A piece of test equipment used to measure voltage, current, and resistance in an electronic circuit. The two prongs attached to the tool connect to the circuit.
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. A form of scientific notation but the exponent of 10 must be divisible by three.
Kirchhoff's Current Law (KCL) The algebraic sum of all currents into and out of any branch point in a circuit must equal zero. I1 + I2 + I3.... = 0
Kirchhoff's Voltage Law (KVL) The algebraic sum of all voltages around any closed path must equal zero. V1 + V2 +V3 .... = 0
LED Light-emitting diode. Conducts current in one direction and lights up. An LED flashlight.
Ohm Unit of resistance.
Ohm's Law I = V/R The current is equal to the voltage over the resistance.
Parallel Circuit One that has two or more branches for separate current from one voltage source. The Chesapeake bay has many rivers and creeks water and flow out and into it.
Resistance Opposition of current A boat is going against the current of a river
Resistor Color Code Coding system of colored stripes on a resistor to indicate the resistor's value and tolerance. Image a tube with strips that determine how goo the tube is.
Scientific Notation Numbers entered as a number from one to ten multiplied by a power of ten. 1.0 x 10^1 = 10
Series Circuit Only one path for the current to follow. A river with only one way in and out of it.
SI Notation Units used internationally. The meter, kilogram, second, ampere, Kelvin, mole, and candela are examples of SI units.
Solder An alloy of tin and lead used to join two metal surfaces Metallic liquid that works like glue.
Soldering The process of joining two metallic surfaces to make electrical contact. A tube of glue, gluing two piece of paper.
Soldering Iron A tool with an internal heating element used to heat and melt surfaces. Hot glue gun that instead poor liquid metal.
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. Running a test flight simulation of a plane to see how it flies.
Created by: XXX_MJM_XXX

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