Editing User Adaptor (section)

== Detecting rotation ==

[[File:Circuit-User-Potentiometer.svg|frame|left|Fig. 2]]

The circuit shown in fig. 2 uses a linear potentiometer to detect rotation.
The track of the potentiometer is connected between the Vref. and 0 Volt sockets.
The input socket is connected to the wiper and as the spindle is rotated the potential divider formed by the two sections of track produces a voltage which swings between around 0 volts up to the maximum of 2.5 volts.
Typical uses of this type of sensor include:

* Detecting when a lifting bridge has reached the open position.
* Measuring the angle through which a pendulum swings.
* Sensing a water level by attaching a buoyant lever to the potentiometer.

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