Tuesday, February 14, 2012

Playing with digital glue: using an arduino as a really expensive voltmeter.

Last Thursday I met up with Loclhst to show him how to use analog sensors with his arduino. 

The process started with testing the photoresistor and thermistor on the bench with a voltmeter.  We then set them up in a voltage divider, and fed 5v across them.  That got us a voltage output we could send to the arduino. 

Then we hooked up the voltage dividers to the arduino, and we got real values. 

Then dan wanted to get his display working.   After we discovered I had a wire crossed, the display worked fine.

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