electronic components (resistors)

The function of resistors to limit the amount of current flowing in one circuit, / can be likened to a piece of board used to hold back the rushing water flow diselokan / small ditch. By using this board prisoners, then the water flow can be obstructed flow. This parable can we apply in electrical resistance.

The more wide / big board used to hold the water got, the less water flowing, so is this incident a lesson can be applied in electronics. The bigger the resistance, the smaller the electric current and voltage through it.

Resistors in electronic circuits can be enabled to:
1. withhold part of electric current to fit the needs of an electronic circuit;
2. reduce the voltage in accordance with that required by the electronic circuit;
3. dividing the voltage (Volt);
4. working with transistors and capacitors in a circuit to generate high frequency and low frequency.

The size of the value of resistance can be expressed with units of Ohm or written with Latin letters Ω (omega) and the notation was written with the letter R. The greater the value the greater Ohmnya prisoner.
Physical form is very different resistors on the phone with a resistor electronics in general that have a color code to determine the value of resistance, mobile shape is very small resistor (Resistor Chip) and the resistance value is not visible on resistornya body, then to know the value of the resistance we need a measuring tool such as AVO -meter, or we can find out through a schematic diagram of the mobile phone.
This is a symbol of resistors

The following is a description & how to calculate resistor 5 colors (known as resitor metal films) on bodynya as follows:

ring / Color to-1 is the first digit
ring / Color to-2 is the second digit
ring / Color to-3 is the third digit
ring / Color to-4 are part / number multiplier (x)
ring / Colors of the 5th is persentage value of the resistor tolerance (Brown = 1% & Red = 2%)

How to Calculate:

Ex (1):
Chocolate - Black - Black-Yellow - Chocolate
100 x 10,000 = 1 million ohms (1%)
1 million ohms = 1000 K (1000 Kilo ohm) = 1 M (1 Mega ohm) 1%
so its value is 1M (1%)

Ex (2):
Red - Red - Green - Orange - Brown
225 x 1000 = 225 000 ohms (1%)
225 000 Kilo ohms = 225 ohms (225K) 1%
so its value is 225 K (1%)

This is the image resistor table

now we see from the function, the resistor can be divided into:

* Fixed Resistors (Fixed Resistors)

That resistor whose value can not be changed, so it is always fixed (constant). This resistor usually made from nikelin or carbon. Functioning as a voltage divider, regulate or limit the current in a circuit as well as enlarge and reduce stress.

* Not Fixed Resistor (variable resistor)
Variable Resistor (VR)

This type of resistor value can be set by hand, almost equal to Varco if arrangements can be made at any time by the operator (there is a key regulator) is called a potentiometer, and if the arrangements made with a screwdriver called a trimmer potentiometer (trimpot). Prisoners in the potentiometers can be made from carbon material and is also made from a coil of wire called a potentiometer wirewound. For use on high voltage usually preferred wirewound types.

That resistor whose value can vary by shifting or rotating the toggle on the instrument, so the resistor value can we set according to need. Functioning as a volume control (set the size of the flow), tone control on the sound system, high and low tone control (bass / treble) and serves as a voltage divider current and voltage.

* NTC and PTC resistors.

NTC (Negative Temperature Coefficient), a resistor whose value will grow smaller when exposed to hot temperatures. While the PTC (Positive Temperature Coefficient), the resistor whose value will be greater when the temperature cools.

* Resistor LDR

LDR (Light Dependent Resistor) are the type of resistor that changes resistance because of the influence of light. When exposed to light dark prisoner greater value, whereas when exposed to bright light in value become smaller.

The wild practice designers sometimes need a resistor with a certain value. However, the resistor value is not in the shop, even the factory itself does not produce it. Solution to obtain a resistor value with a unique resistance can be done by way weave some resistors to obtain the required resistance value. There are two ways to couple the resistor, namely:

1. How Serial or often referred diseri

2. Parallel ways

The series of resistors in series will result in larger total resistance value.

Below is an example which assembled in a serial resistor.

Resistors

Series resistor in the circuit is the formula:

While the series of resistors in parallel will result in smaller resistance value replacement.

Below are examples of resistors arranged in parallel

In parallel resistor circuit also applies the formula:

3. Resistor values standard

Not all resistance values are available on the market. Table 1.2 is an example of a standard resistor value table in the market. Data on the resistors on the market can be obtained from the Data Sheet issued by the resistor manufacturer.

Ohm's Law formula often used in the calculation of electronics. This is the basis of which should be known by fans of electronics. With a table diagram but have a lot easier to memorize formulas.

Below are some formulas (Ohm's Law), which is often used in the calculation of electronics:

R = resistance with units of Ohm
V = voltage in Volt units
I = current in units of Ampere
P = power to the unit Watt

Conversion unit:
1 ohm = 1 Ω
1 K Ohm = 1 K Ω
1 M Ohm = 1 M Ω
1 K Ω = 1.000 Ω
1 M Ω = 1.000 K Ω
1 M Ω Ω = 1 million
(M = Mega (106); K = Kilo (103)

there are many more electronic components, yet the manual and how you can measure with a subsequent discussion is Capacitor (Capacitor). I hope you be patient and hopefully you understand

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