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Fig. 9.
3.
A Quick Tour
The SSP has the following sensors and actuators
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Potentiometer 1 – variable voltage, current or current loop
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Potentiometer 2 – variable resistance
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Potentiometer 3 – variable RTD simulator
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Speaker / Microphone
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Light Sensor – a silicon photodiode which outputs a voltage and current proportional to
ambient light
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Ruler – configured as a full bridge, in which 2 halves of the ruler are two active arms of the
bridge
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DB9 connector for serial data channel, configured as a PC COM1
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2 push buttons – digital inputs
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5 yellow LEDs –digital outputs
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Single pole changeover Relay (under pcb) and 2 terminal block
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Flexible tongue – configured as a full bridge, where fine copper tracks on the topside and
underside of the tongue are two active arms of the bridge
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Magnetic pickup on the tongue
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Analog output LEDs
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