Siren with Piezo [Archive] - Parallax Forums

NWCCTV

03-05-2010, 02:31 AM

I· was just wondering if anyone has any code for the piezo speaker in the Boe Bot kit to make a siren sound, either police or ambulance or fire truck. Thanks. Could also use a locomotive sond, but not sure if that is doable. I have been playing around with it, just cant seem to nail it down.

PJ Allen

03-05-2010, 07:02 AM

Maybe a euro-siren, alternating two tones (deee-dooo, deee-dooo,...)?

erco

03-05-2010, 07:38 AM

The Scribbler came preprogrammed with several demo routines, the last one generated a siren sound while it drove around and avoided obstacles. Track down that program from the P'lax website and extract that code...

But you can·achieve the same with several FREQOUT commands in a loop. Pretty basic stuff.

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·"If you build it, they will come."

kf4ixm

03-05-2010, 07:49 AM

Do

freqout 11, 200, 700, 750
freqout 11, 200, 900, 950

loop

BoeBot

03-05-2010, 10:34 AM

http://forums.parallax.com/showthread.php?p=887352

Check the attachment. http://forums.parallax.com/images/smilies/smile.gif

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Change is inevitable - except from a vending machine.

Robert C. Gallagher

Post Edited (BoeBot) : 3/5/2010 3:55:02 AM GMT

NWCCTV

03-05-2010, 11:37 AM

Thanks everyone. I think I got it now.