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# DE Unit 1.1

### Important Terms for Digital Electronics

Term | Definition | Word in a Sentence |
---|---|---|

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. | To know the exact time, check an analog clock. |

Breadboard | A circuit board for wiring temporary circuits, usually used for prototypes or laboratory work. | Using breadboards for labs allow for mistakes to be made and lessons to be learned because the circuits created are temporary. |

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. | When we label the flow of a current in a circuit, we label the flow of the conventional current. |

Current | A movement of electrical charges around a closed path or circuit. | Current is what passes through your body when you get shocked. |

Digital | A way of representing a physical quantity by a series of binary numbers. A digital representation can have only specific discrete values. | Most of the clocks we use today are digital. |

Digital Multi-Meter(DMM) | A piece of test equipment used to measure voltage, current, and resistance in an electronic circuit. | We use a multi-meter in labs to measure voltage, current, and resistance. |

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. | Engineering notation is very similar to scientific 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. | You use KCL to determine the current in a circuit. |

Kirchhoff’s Voltage Law (KVL) | The algebraic sum of all voltages around any closed path must equal zero. | You use KVL to determine the voltage in a circuit. |

LED | Light-emitting diode. An electronic device that conducts current in one direction only and illuminates when it is conducting. | We can use LED's to verify that current is passing through a circuit. |

Ohm | Unit of resistance. Value of one ohm allow current of one ampere with potential difference of one volt. | Ohms are equal to the resistance in a circuit. |

Ohm’s Law | In electric circuits, I=V/R. | Ohms law is used to find out the voltage, current, and resistance in a circuit. |

Parallel Circuit | One that has two or more branches for separate current from one voltage source. | A parallel circuit carries the same amount of voltage throughout the circuit. |

Resistance | Opposition to current. Unit is the ohm. | Resistance reduces the amount of current flowing throughout a circuit. |

Resistor Color Code | Coding system of colored stripes on a resistor to indicate the resistor's value and tolerance. | The resistor color code can be used to create a resistor with a specific value of resistance and a specific level of tolerance. |

Scientific Notation | Numbers entered as a number from one to ten multiplied by a power of ten. | Scientific notation is similar to engineering notation. |

Series Circuit | One that has only one path current. | A series circuit consists of voltage drops but a consistent current. |

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 wave forms. | Simulation is used to find out what kind of outputs you get from certain inputs. |

SI Notation | Abbreviation of System International, a system of practical units based on the meter, kilogram, second, ampere, Kelvin, mole, and candela. | SI Notation is what the rest of the world uses. The United States utilizes imperial notation. |

Solder | Metallic alloy of tin and lead that is used to join two metal surfaces. | When you want to bond 2 metal surfaces, you solder them together. |

Soldering | Process of joining two metallic surfaces to make an electrical contact by melting solder (usually tin and lead) across them. | Soldering is the combining of 2 metal surfaces. |

Soldering Iron | Tool with an internal heating element used to heat surfaces being soldered to the point where the solder becomes molten. | A soldering iron is the tool that allows 2 metal surfaces to be soldered together. |