SV: [sdiy] Proximity volume control.

[John Alex Hvidlykke]

I have no practical kowledge about these parts myself, but could an
ultrasonic range sensor be the way to procede?
http://www.micro-examples.com/public/microex-navig/doc/090-ultrasonic-ranger
.html

Regards

John

> -----Oprindelig meddelelse-----
> Fra: synth-diy-bounces at dropmix.xs4all.nl
> [mailto:synth-diy-bounces at dropmix.xs4all.nl]Pa vegne af peter edwards
> Sendt: 28. november 2009 13:50
> Til: SDIY DIY
> Emne: [sdiy] Proximity volume control.
>
>
> I'm working on a series of synth podiums for a show coming up in a
> few months. I want the volume of each podium to increase as the
> viewer approaches it, or at least (worst case) to turn on when they
> are standing in front of it. I think a range of 1-2 feet is necessary.
> I've been thinking about different methods. IR distance sensors or
> something of that sort could work but would require lots of
> processing hardware. I think that capacitive sensing would work fine
> and would ultimately be the cheapest and easiest option. Thoughts?
>
> I couldn't find schematics for "capacitive volume control" or
> "proximity volume control" so I started looking into "theremin volume
> control". This seems to be what I want, but I think theremin range is
> calibrated for approx 6"-1' right? I also want to set it so that the
> volume increases as the viewer moves closer and produces NO sound
> when there is no one standing close to the podium.
> Has anyone else here worked with this kind of circuitry? I'm hoping
> there's someone here I could chat with for a few minutes. thanks!
>
> -pete edwards
> casperelectronics
>
>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
> No virus found in this incoming message.
> Checked by AVG - www.avg.com
> Version: 9.0.709 / Virus Database: 270.14.85/2531 - Release Date:
> 11/27/09 20:39:00
>