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− | This article is being split into components check for duplication prior to updataing | + | This article is being split into components check for duplication prior to updataing |
== Resistors == | == Resistors == | ||
Probably the most basic component, just a hunk of wire ( low resistance ) or a long thin wire ( high resistance ). | Probably the most basic component, just a hunk of wire ( low resistance ) or a long thin wire ( high resistance ). | ||
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When a voltage is applied to the two ends of an object, then a current usually flows through the object. If the object resists the voltage then the current will be small, if it does not then the current will be high. The amount of resistance is, tactfully, called the resistance. It is measured in ohms. ( Note that acting as a resistor is the simplest thing the object can do, there are more complicated behaviors, see capacitor, diodes, inductors, etc. A resistor is pretty much the simplest of electrical components. | When a voltage is applied to the two ends of an object, then a current usually flows through the object. If the object resists the voltage then the current will be small, if it does not then the current will be high. The amount of resistance is, tactfully, called the resistance. It is measured in ohms. ( Note that acting as a resistor is the simplest thing the object can do, there are more complicated behaviors, see capacitor, diodes, inductors, etc. A resistor is pretty much the simplest of electrical components. | ||
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Links | Links | ||
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#[http://www.piclist.com/techref/resistors.htm Components: Resistors] | #[http://www.piclist.com/techref/resistors.htm Components: Resistors] | ||
#[http://en.wikipedia.org/wiki/Inductors Resistor From Wikipedia, the free encyclopedia] | #[http://en.wikipedia.org/wiki/Inductors Resistor From Wikipedia, the free encyclopedia] | ||
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=== Carbon === | === Carbon === | ||
− | The most common found resistor is the carbor film. Theses are generally the cheapest and most used in devices. The commonly are designed to withstand 1/8, 1/4, 1/2, and 1 watts of power | + | The most common found resistor is the carbor film. Theses are generally the cheapest and most used in devices. The commonly are designed to withstand 1/8, 1/4, 1/2, and 1 watts of power. |
=== Metal Film === | === Metal Film === | ||
− | The resistive material is a thin metal film | + | The resistive material is a thin metal film. |
=== Wire-Wound === | === Wire-Wound === | ||
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FETs can be used as a variable resitor over some of the gate voltages -- I think. This clearly needs more work. | FETs can be used as a variable resitor over some of the gate voltages -- I think. This clearly needs more work. | ||
− | + | === Thermistor === | |
− | + | All resistors vary in resistance with temperture, for a thermistor this is a desireable characteristic, used to measure temperature, see [[Sensors]]. | |
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== Potentiometers == | == Potentiometers == | ||
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=== Digital Pots === | === Digital Pots === | ||
− | Accept digital signals to control a solid state pot. | + | Accept digital signals to control a solid state pot. |
=== Laboratory Pots === | === Laboratory Pots === |