Sensors & Circuits: Difference between revisions
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==Hall Effect== | |||
[http://www.sensorwiki.org/index.php/Hall_effect Hall Effect] on Sensorwiki.org | |||
Revision as of 15:48, 27 June 2007
IR Distance
Reflective Optical Sensor
The reflective optical sensor ( Datasheet ) consists of an infrared LED, labelled "E" for Emitter on the diagrand and on the package, and a phototransistor that passes an amount of current proportional to the reflected light received. The phototransistor is labelled "S" for Sensor. The one leg of the sensor is connected to +5V, which supplies current, and the voltage drop across the 10k resistor that we measure is proportional to the amount of current.
There is a continuous voltage response for objects over a short range of proximity to the sensor. The response is not linear. Linearity can be approximated by the log of the log of the signal.
Hall Effect
Hall Effect on Sensorwiki.org