Hi all,

Is there a sensor / module which outputs a analogue voltage with angular change? I want to use it for monitoring an object which will rotate 180 degrees. The reason for not using a potentiometer is because I am limited with space.

Any kind of help will be appreciated.

 

Yes, but they usually have a limited range, although there is one listed here

http://www.bpe.it/public/bpeelectronics/en/Prodotti/Trasduttori_angolo.html

 

how about a trim pot, about 1/4 inch around.

 

Can you be more specific about size and space available as well as voltage and amperage specifications?

 

I get 160 degrees from these
http://uk.rs-online.com/web/p/inclinometer-ics/6912381/

 

How about using an accelerometer. As an example, MXP7205VF will measure static acceleration (gravity).

 

Ebay has tiny $4 accelerometer modules that output 3 linear voltages for the 3 axes. They have three output wires, marked; X Y Z.

To compute rotary angle you will need to measure two axis voltages and do some simple sine/cos math.

 

Hi,

Thanks for the replies. The tutorial in the link below shows how to use 2 axis for measuring the angle, but the problem is that apparently one can only monitor an angle less than 90 degrees. Is this true? and how accurate can I get?

Thanks in advance.

 

Link: http://www.hobbytronics.co.uk/accelerometer-info

 

Can you be more specific about size and space ....?

Second this! How about a photo of the location where you are trying to mount an angle sensor? It may open up other possibilities.

Ken

 

...
Thanks for the replies. The tutorial in the link below shows how to use 2 axis for measuring the angle, but the problem is that apparently one can only monitor an angle less than 90 degrees. Is this true? and how accurate can I get?
...

The analogue accelerometers output a voltage representing the G force of gravity. The voltage is centred. (For example) 2.5v for 0G, and 1v for +1G (upright) and 4v for -1G (upside down).

So the voltage will show all angles not just 0-90', but you need two axes and work from sin/cos of the two voltages.

It sounds tricky but is very simple in software. There are tons of "DIY accelerometer inclinometer" projects you could google.