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Author Topic: Axon and resistive force sensor  (Read 663 times)

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Offline mstachoTopic starter

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Axon and resistive force sensor
« on: January 13, 2011, 09:53:04 AM »
I'm thinking of getting a few resistive force sensors -- the ones that change their resistance when a force is applied.  In order to read from them, I'd have to supply a voltage, is that right?  Can the axon just read resistance at its analog inputs, or do I have to make a reading circuit for the sensor that measures voltage drop across it?

MIKE
Current project: tactile sensing systems for multifingered robot hands

Offline Admin

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Re: Axon and resistive force sensor
« Reply #1 on: January 13, 2011, 10:09:48 AM »
ADC only reads voltage, so you need to create a voltage divider to know resistance.

Follow this tutorial:
http://www.societyofrobots.com/schematics_photoresistor.shtml

but instead of light changing resistance, you have force changing resistance. Works exactly the same.

Also good reading:
http://www.societyofrobots.com/sensors_forcetorque.shtml

If the signal is very small, you'll need to amplify it using an Op-Amp, or a Wheatstone bridge.

 


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