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1  Using Arduino / Audio / Play tones in headphones using Arduino on: November 18, 2012, 05:07:49 pm
Hi!

I would like to play audio tones in headphones using Arduino, and would appreciate
some help about how to do this. The headphones should be able to play stereo tones
in various frequencies based on a signal from the Arduino.
I hope there is some breakout board from sparkfun or something similarly easy for this.


Thanks!

Andreas
2  Using Arduino / Motors, Mechanics, and Power / Re: Rectangular cylinder controlled by Arduino on: July 27, 2012, 03:25:24 pm
Thanks for the useful feedback. I'll try to make the prototype myself using wood, and if that works okay I'll get someone to make a prototype using an CNC machine. I'll post some more updates later if you are interested.
3  Using Arduino / Motors, Mechanics, and Power / Re: Rectangular cylinder controlled by Arduino on: July 26, 2012, 03:50:52 pm
Round the corners - the o-ring won't like to seal into a sharp corner and it makes it easier to machine the pocket.

You are right, the corners should be made round. I'll improve that in my next iteration. Thanks!

But how can I get such a cylinder made? I'm guessing it would require some very good metalworking and blacksmith skills. Does anything which resembles this exist anywhere in the world?
4  Using Arduino / Motors, Mechanics, and Power / Rectangular cylinder controlled by Arduino on: July 26, 2012, 01:12:53 pm
I'm doing an Arduino hardware project, and would really appreciate some feedback from this forum.
Central to the project is a rectangular cylinder which will be moved by a solenoid controlled by an Arduino.
I have attached a sketch of the rectangular cylinder below. The piston in the cylinder will move up and down
as shown on the sketch.

Figure 1 shows the rectangular cylindrical chamber.
Figure 2 shows the piston which will move up and down inside the cylinder.
Figure 3 shows the cylinder from the side.

The cylinder must be quite strong and light, and work in temperatures from -20C to 30C.

I'm wondering if it is possible to buy such a cylinder somewhere? If not, what is the best way to get someone to make a prototype of such a piston?

Thanks for any help you may be able to provide!

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