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[on:]

Hi: New to the forum and would like help to find a simple sensor to measure horizontal level i.e.
Side to Side and Front to Back.
any suggestions from the learned members.

[Reply #1 on:]

It sounds like you are looking for an accelerometer. When still, the accelerometer gives you X, Y, and Z components of the force of gravity. So when perfectly level, Z will be 1g (well.... -1g since it's pointing down) and X/Y should be 0g. When tilted, the X/Y components will increase.

If this sounds like it would work for your application then Googling for accelerometers to work with Arduino will lead to lots of information.

--
The Gadget Shield: accelerometer, RGB LED, IR transmit/receive, speaker, microphone, light sensor, potentiometer, pushbuttons

[Reply #2 on:]

Thanks for the suggestion. I will do some reading on accelerometers.

[Reply #3 on:]

I made a music box on the same principle, The box uses an accelerometer to sense which side is up.

http://liudr.wordpress.com/2011/01/24/music-box/