[sdiy-interim] Laser voltage control

[Tim Parkhurst]

On 3/28/07, David Brown <davebr at earthlink.net> wrote:
> I guess this is synth related.  I have a Ramsey Electronics LLS1
> laser light module.  This has two motors and a speaker with mirrors
> on each for creating patterns.  The motors are controlled by two 555s
> that vary between 50% and 90+% duty cycle.
>
> I pulled the 555s and replaced them with a small daughter-board that
> has an ATTINY13 on it programmed with a control voltage to pulse
> width program.  A 0 to 5 volt control voltage at each of the two
> inputs results in a 50% to 100% duty cycle square wave in 2 degree
> increments to control the speed of each motor.  Now I can visualize
> my control voltages and LFOs.
>
> I need to replace the mirror on the speaker with one that is larger
> so I can fan the display out more.  I'd like to replace the speaker
> with a linear motor of some type so I don't hear it.  Any
> suggestions?  It needs to be physically small and able to be driven by a LM386.
>
> Dave
>

I would think that a low mass is more important that small size
(although they are often releated). Why don't you try some metalized
plastic (e.g. silver anti-static bags), or even some aluminum foil for
a mirror? The metalized plastic sounds like it would be easier to
handle (less likely to rip or wrinkle) than foil.


Tim (ripped AND wrinkled) Servo
-- 
"Imagination is more important than knowledge." - Albert Einstein

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