Interlink-electronics Ring Sensor Manual do Utilizador descarregar pdf (Página 5)

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Ring Sensor

Integration Guide

D2D3

At any one time, the two drivelines furthest from the point of touch are being driven.

The Interlink sensor is shown schematically in Fig. 2. The sensor has four connections. Three of

the connections are drivelines for the resistor ring. The fourth line is the sense line.

The algorithm for measuring this sensor is straightforward and can be implemented in any small

microcontroller. Described in Section 5 is an algorithm using one eight-bit ADC and three general-

purpose I/O lines. Instead of an ADC, one could also use an op-amp voltage follower and a slope

converter.

Figure 2: Schematic representation of the Ring Sensor.

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Interlink-electronics Ring Sensor Manual do Utilizador Página 5