Friday, December 10, 2010

How to Identify Resistor's Symbols and Layout

The symbol of a Resistor, as you can see that it is being label started with letter ''R''''Mounted Code'', that code is the number of that resistor for easy identification and search reason on the whole structure of a PCB board. Then,  also ob-course the Resistance Value for test and check up procedures, like for example ''R4400 = 47K''  it means that Resistor number 4400 connected on that particular circuit's value is 47K  or 47000 ohms. In that way we can easily trace and and test that component using a Multi-meter tester. 


There are two types shown in here, The first one is
Fixed Resistor and the other one with a line across to it is called Thermistor or Thermal Resistor.
Thermistor or Thermal resistor is a variable Resistor, meaning it's resistance value is changeable. Thermal defines to heat temperature, it is being change by a current or voltage flowing across to it. It also have a capability to shut off when a voltage or current drive it to a maximum temperature level.
While the
Fixed Resistor, remains steady to it's resistance value.
meaning for Resistance and followed by a

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