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POE 3.1 Key Term
O'Connor POE Unit 3.1 Key Terms
| Term | Definition |
|---|---|
| Algorithm | A step-by-step procedure for solving a problem or accomplishing some end, especially by a computer. |
| Analog Signal | A signal having the characteristic of being continuous and changing smoothly over a given range, rather than switching suddenly between certain levels. |
| Analog to Digital | Conversion of an analog signal to a digital quantity such as binary. |
| Closed Loop System | A control system that considers the output of a system and makes adjustments based on that output. |
| Data | Information encoded in a digital form, which is usually stored in an assigned address of a data memory for later use by the processor. |
| Digital Signal | A system of discrete states: high or low, on or off, 1 or 0. |
| Digital to Analog | Conversion of a digital signal to its analog equivalent, such as a voltage. |
| Electromagnet | A conductor wrapped around an iron core. The two ends of the conductor are attached to a power source. When current passes through the conductor, the iron core becomes magnetized. |
| Feedback | The return to the input of a part of the output of a machine, system, or process (as for producing changes in an electronic circuit that improve performance or in an automatic control device that provide self-corrective action). |
| Flowchart | A diagram that shows step-by-step progression through a procedure or system especially using connecting lines and a set of conventional symbols. |
| Input | Information fed into a data processing system or computer. |
| Interface | The place at which independent and often unrelated systems meet and act on or communicate with each other. |
| Microprocessor | The central processing unit that is generally made from a single integrated circuit. |
| Normally Closed | The contact of a relay that is closed when the coil is de-energized. |
| NTC Resistor | A negative temperature coefficient, also known as a thermistor, is a sensitive resistor whose primary function is to exhibit a change in electric resistance with a change in temperature. |
| Open Loop System | A control circuit in which the system output has no effect on the control. |
| Output | The information produced by a computer. |
| Photocell | A photo-sensitive resistor whose resistance decreases as the light striking the unit increases. |
| Polarity | The type of charge an atomic particle has. |
| Potentiometer | A switch that can provide variable motion control. It can vary the resistance within the switch, which affects both the current and voltage flowing out of the switch. |
| Programmable Logic Controller | A specialized heavy-duty computer system used for process control in factories, chemical plants, and warehouses. Closely associated with traditional relay logic. Also called a programmable controller (PC). |
| Sensor | A device that responds to a physical stimulus (as heat, light, sound, pressure, magnetism, or a particular motion) and transmits a resulting impulse (as for measurement or operating a control). |
| Subroutine | A subordinate routine; specifically, a sequence of computer instructions for performing a specified task that can be used repeatedly. |
| Switch | A device for making, breaking, or changing the connections in an electrical circuit. |
Created by:
toconnor
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