What is a Potentiometer?
A “pot” or “potentiometer” is a variable resistor. Rather than having a fixed value
like 220Ω or 10KΩ, a potentiometer can take on any range of values between 0 and
the value for which it is rated (e.g., 0 to 10KΩ). Usually, the resistance of
a pot is varied by turning a screw or a handle.
Two common types of pots are:
- trim pot
- Useful where the optimum setting needs to be made once or infrequently (e.g., an
- LED screen background). It is meant to be adjusted with a little screwdriver.
- panel mount pot
- Useful where the setting will be made frequently by turning a (big) knob (e.g.,
- the volume or station setting on a radio).
|Trim Pot||Panel Mount Pot|
This packet shows how to use a pot to change the state of an LED.
One example shows how to make the LED brighter or fainter; another shows how
to make the LED blink faster or slower.