Editing Sensors (section)

== Making your own sensors ==

You can make your own analogue and digital sensors for use with Smart Box.
Analogue sensors tend to be slightly more complex as they produce a voltage which varies depending on the condition of the sensor.
Digital sensors on the other hand simply complete the circuit between the red and yellow sockets.

=== Analogue sensors ===

You can connect your own analogue sensors to Smart Box via the sensor adaptor.
This brings the connections from the analogue sensor sockets to 4mm connectors on the lid of the adaptor.
The sockets are marked Input, Ground and Vref.

The Smart Sense range of analogue sensors are identified by Smart Box when they are plugged in.
The sensor adaptor allows other sensors to be recognised.

The voltage between the input and ground sockets should vary between 0 volts and a maximum of 2.55 volts.
The Vref socket provides a 2.55 voltage source.
The inputs to Smart Box are protected against over voltage.

=== Digital sensors ===

[[File:Sensor-Switch.svg|left]]

The eight input sockets on the top of the box simply require a connection to be made between them.
This can be a switch such as a push switch or microswitch, or any device which will complete the circuit.
Connect your ‘switch’ to Smart Box using a length of 2 core cable terminated with 4 mm plugs.

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[[Category:Smart Box]]