Alt-BEAM Archive
Message #05826
To: beam@sgiblab.sgi.com
From: Bruce Robinson Bruce_Robinson@bc.sympatico.ca
Date: Sun, 22 Aug 1999 19:13:06 -0700
Subject: [alt-beam] Re: Chirper and other sound effects!
Wilf Rigter wrote:
>
> ok Sparky,
>
> Here it is!
>
> This circuit uses the 2 spare gates of
> Ian's reverser circuit and makes "birdy
> chirps" when the bot backs up.
Quick question, Wilf. Is that a piezo audio transducer, or a piezo
buzzer? Reason I ask, I was helping Sparky debug his circuit and in the
process we discovered that A) the circuit he was following wouldn't
work, and B) even if it did work, he was using the wrong piezo device
for that type of circuit.
Bruce
5827 Sun, 22 Aug 1999 20:26:08 -0700 [alt-beam] Re: Chirper and other sound effects! "'beam@sgiblab.sgi.com'" Wilf Rigter
Hi Bruce!
Didn't check my email for a while or I would have replied sooner.
It's a piezo audio transducer - Active Components ~ $1
Also attached find the mother of all chirper circuits.
It does quite a good job of imitating a song bird : mood changes with light
level.
Tested it with 74C14 but 74HC/HCT14 should also work.
Needs some fine tuning to make it perfect.
Next contest: best BEAM FX (special effects)?
enjoy
<>
Wilf Rigter mailto:wilf.rigter@powertech.bc.ca
tel: (604)590-7493
fax: (604)590-3411
> -----Original Message-----
> From: Bruce Robinson [SMTP:Bruce_Robinson@bc.sympatico.ca]
> Sent: Sunday, August 22, 1999 7:13 PM
> To: beam@sgiblab.sgi.com
> Subject: Re: Chirper and other sound effects!
>
> Wilf Rigter wrote:
> >
> > ok Sparky,
> >
> > Here it is!
> >
> > This circuit uses the 2 spare gates of
> > Ian's reverser circuit and makes "birdy
> > chirps" when the bot backs up.
>
> Quick question, Wilf. Is that a piezo audio transducer, or a piezo
> buzzer? Reason I ask, I was helping Sparky debug his circuit and in the
> process we discovered that A) the circuit he was following wouldn't
> work, and B) even if it did work, he was using the wrong piezo device
> for that type of circuit.
>
> Bruce
Attachment: BEAMFX.gif
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