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Author Topic: Looking for an Angle sensor  (Read 4989 times)
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picture a solar panel pointed at the sun --- I would like the sensor to output that angle relative to horizonal (or vertical ) 


What I'm picturing is calling out for a simple potentiometer-based solution. Off hand I can't see why you would need anything more complex.
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Good old ebay

found this today ~$7

http://www.geeetech.com/adxl345triple-axis-accelerometer-breakout-p-384.html

This ADXL345 is dynamic acceleration resulting from motion or shock, also well suited to measures the static acceleration of gravity in tilt-sensing applications.Its high resolution (4 mg/LSB) enables measurement of inclination changes less than 1.0°.



The price is good and the temperature limits are like -40 to 105 degrees C 

just have to figure out how to get the info  -- the link above includes a PDF Schematic data sheet and library

cool
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nr Bundaberg, Australia
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That's a nice chip, I've used the ADXL335 before but it's got none of those features.

______
Rob
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I have a couple of the ADXL206HDZ chips here...

I got them as free samples from Analog Devices.  I looked them up the other day with a view to using them in a project.

I nearly fainted.  Newark list them at $711.25!!!

I went back to AD to try and get some more samples of them ... surprisingly they don't seem to be doing them as samples any more... smiley-sad
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Quote
potentiometer-based solution.
I think a non-mechanical solution would be less prone to problem over the years. Also pots tend to require a lot of force to move, maybe a shaft encoder would be better.

I still like the accelerometer for this though.

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Rob
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That's a nice chip, I've used the ADXL335 before but it's got none of those features.

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Rob

I don't understand I pulled that quote straight from the Analog data sheet

http://www.geeetech.com/Documents/ADXL345%20Datasheet.pdf

I thought of using a peduluum and pot thingy but my concern was reliability and longevity in a semi- protected environment with temperature swings


I hope this will work
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Quote
That's a nice chip, I've used the ADXL335 before but it's got none of those features.

______
Rob
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Hi, I sell a few angle measuring sensors in my website that might help you, http://www.asquared.cc/products/me-ri-1-02 - have a few contact-less encoders based on hall-effect sensors.
All you need is to do is attach the magnet to the rotating shaft and have it near touching to the sensor, works like a charm.
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You can get the sensor for that or something similar here:-
http://uk.farnell.com/austriamicrosystems/as5040-assu/encoder-magnetic-rotary-10bit-16ssop/dp/1630800
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