Resistors are included in the description of passive components in Passive Electronic Components Discussion article , which means that the component can not amplify or increase the current , voltage and signal and can only reduce it . Resistors including important part of an electronic circuit.
The value on the resistor in the state in units called ohms as well as resistance , custody or barriers . Many types of resistors based on function , material and construction pembuatanya . The type that is often used is a fixed resistor and a variable resistor ( not fixed ).
The function of resistors generally is to reduce the voltage and current strength before going into other components , for example to transistors , capacitors , inductors and integrated circuits on a circuit that serves to strengthen the audio signal , radio and video.
With the resistor in the expected voltage and current adjustment is needed in the circuit . Resistor kinds according to their construction :
1 . Resistor type SMT ( Surface Mount Technology )
This type is widely used in today's electronic devices , which is the latest type with a relatively small physical components can be applied in a minimalist device.
Type SMT resistors made from materials such as tin oxide resistive film which is stored on a tiny ceramic chip , which is then cut to adjust the value of resistance / resistance exactly as expected ( depending on the width of the film resistor ).
The tolerance can be approximately 0.02 % . SMT resistor type is designed for automated assembly and manual assembly it is difficult to physically shaped as small . This resistor has the ability to very low power dissipation .
2 . Resistor Carbon Film Resistor type
The most inexpensive type of resistors among others , by construction similar to the type of metal resistor films but has a very large tolerance value up to approximately 5 % . Most suitable for manual assembly as physically easy on hold .
3 . Resistor type Carbon Composition Resistor
This is the oldest type of resistor , and included cheap price. Material is essentially carbon in print / on enter into a tubular casing . In the old type of rubber compound used as a mixture , but on a new type of ceramic filler more in use.
Tolerance of this type of resistor is approximately 10 % to 20 % , a very large tolerance and are particularly useful in circuits with high voltage and high power . Value of resistance / resistance is determined by the percentage of mixing between the carbon and filler.
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| Resistor type according the construction |
Types of carbon composition resistors and metal film , available in many power levels from 0.125 to 5 watts . In a resistor no power disappears and gets hot on the surface depends on the amount of voltage and current through it . This affects the amount of power that comes out that is certainly smaller than the input power , can be calculated using the formula P = IV . For this type of resistor , the greater the expected value of the rating , the greater must be physical in buata the resistor.
5 . Resistor type wire wound resistors
At first glance can be seen winding wire on a ceramic or glass fiber rod and cement coated insulation resistance , the wire is a type of resistor resistive element that has a different resistance value in each material used . A common material in use is Nickel / Chromium ( Nichrome ) or Manganin ( Copper / Nickel / Manganese ).
This is a type of resistor type resistant to heat but a lot of throwing power in use so it is recommended to use high power sirkut .
6 . Type metal film resistor
An alloy of nickel or tin oxide that coats the stem Kerami , its resistance depending on the thickness of the coating layer ( note : the thicker the layer , the lower the value of the resistance / prisoner ) . This type of resistor resistance provides a variety of sizes , from tens of millions of ohms up to the lowest value .
7 . 5 watt wirewound resistor type resistors
Wirewound resistor type which has the physical size and small power rating of a carbon composition and carbon film . The tolerance can be in the range of 10 % .
8 . Resistor type PCB Mount Wirewound resistors
Type of resistor that has a value range between 1Ω to 50Ω . using resistive wire as the main ingredient , more meneyerupai as inductor component in some respects . So it is not suitable for use in low frequency sampi about 1 kilohertz ( kHz ) . Have a great physical wrapped in a layer of ceramic refractory .
9 . Type High Power Metal Film resistors
Type metal film resistor capable at high power is usually less than 5W , but has a smaller tolerance .
10 . Wirewound resistor fusible resistor type.
Resistor type that uses a spring connection attached to the resistor body . In hot conditions are not reasonable ( high ) in this type of resistor allows melting tin solder and stop the flow of the spring . In this case need to be noticed at the time because it affects the spring soldering resistors . Corresponding construction in the manufacture of resistors can be various types of resistors .
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