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# Lesson 1.1 Part A

Term | Definition | Example |
---|---|---|

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. | Ω |

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. |

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