or use a cam gear


> -----Original Message-----
> From: Stephen B Webb
> Sent: Tuesday, November 21, 2000 8:08 PM
> To:   PICLIST@MITVMA.MIT.EDU
> Subject:      Re: [PIC]:Sin wave
>
> Maybe you could avoid the sin calculation, and pwm stuff all together and
> opt for a mechanical solution?
>
> Motor drives a pulley with a peg on the perimeter.  Peg fits into a
> horizontal slot on a vertical prismatic joint.  Turning the motor on makes
> the prismatic joint move up and down as a sine wave.  Vary the speed of
> the motor, and you vary the period of the sine wave.
>
>
> Just a thought.
>
> -Steve
>
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