Alt-BEAM Archive

Message #08946



To: beam@sgiblab.sgi.com
From: Scott Burns s-burns@uiuc.edu
Date: Sun, 09 Jan 2000 08:18:02 -0600
Subject: [alt-beam] Re: SIMPLIFIED D1 CIRCUIT


The noises that Piezo elements make tend to be harsh. Is there a circuit
that will make a piezo speaker emit a nice "bing" sound?

Scott
s-burns@uiuc.edu

At 03:06 PM 1/8/2000 -0800, you wrote:
>Right-On that sonic D1 idea Richard! Another point to consider is that
>making sounds with a piezo speaker takes a lot less current than making
>lights with LEDs. So a combined audio-visual performance with the LEDs in
>sync with the "music" will not appreciably increase total supply current.
>Besides sound can be generated with the supply less than 1V, well below the
>point the LEDs go out.
>
>regards
>
>wilf
>
>----------
>From: Richard Caudle
>To: beam@sgiblab.sgi.com
>Sent: 1/8/00 1:37:15 PM
>Subject: Re: SIMPLIFIED D1 CIRCUIT
>
>Evening Wilf (et al),
>
>You could also use sound as an initiating method. Instead of it being off
>for X number of minutes, it would be off until the sound level makes it
>activate. That way the operational time could be extended even more, with
>the possibility of making it through until the next morning so that the
>voltage level never makes it the the 'death' point. Put a battery and solar
>charger on it and you have a fully functional robot 90+% of the time!
>
>Just another HPV thingy insinuating itself into the conversation!
>
>Richard

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