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Resistors are what is known as a passive component, meaning that they physically don’t really do much and do not require power to function.
In reality, Resistors are actually very important components which are used for a number of functions including:
Reduction of current flow.
To divide voltages in a voltage divider circuit.
Adjusting signal levels.
Resistors can either be fixed in value or variable.
Probably the most important thing to know about resistors is their value (measured in Ohms – Ω) The higher the value in Ohms, the more resistance and the less current that flows through the resistor.
You can read the value of a fixed resistor by looking at the coloured bands on the surface.
The chart shown in Fig 1 is a good example of the colour band and how to work out the value.
I have found the easiest way to work out the value of a fixed resistor in practice is to download a readily available resistor colour code app onto your portable device and simply let it work out the value for you as in reality we probably have more important working out to do than this!
Fig 2 shows an example of how the colour code works on a common resistor.
In reality, Resistors are actually very important components which are used for a number of functions including:
Reduction of current flow.
To divide voltages in a voltage divider circuit.
Adjusting signal levels.
Resistors can either be fixed in value or variable.
Probably the most important thing to know about resistors is their value (measured in Ohms – Ω) The higher the value in Ohms, the more resistance and the less current that flows through the resistor.
You can read the value of a fixed resistor by looking at the coloured bands on the surface.
The chart shown in Fig 1 is a good example of the colour band and how to work out the value.
I have found the easiest way to work out the value of a fixed resistor in practice is to download a readily available resistor colour code app onto your portable device and simply let it work out the value for you as in reality we probably have more important working out to do than this!
Fig 2 shows an example of how the colour code works on a common resistor.
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