Re: pinhole vibrating stick speaker

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From: Paul Doherty (pauld@exploratorium.edu)
Date: Thu May 08 2003 - 15:18:29 PDT 

Message-Id: <l03110764bae087d10f0d@[192.168.111.161]>
Date: Thu, 8 May 2003 15:18:29 -0700
From: Paul Doherty <pauld@exploratorium.edu>
Subject: Re: pinhole vibrating stick speaker

Hi Jeff

Older tape players work better since they were designed to deliver enough
power to operate "pre-super magnet" speakers.

Also any audio amplifier such as a boom box will provide plenty of power to
drive the speaker.

Or just put your CD player into a radio shack amplified speaker module.
they run about $12.

Good luck
it's a fun activity.

Paul D

>In an Explo workshop last year, we attached the audio output of a radio (I
>think) to a small motor. Then
>we attached a stick to the motor. The stick vibrated. Bite on the vibrating
>stick and our mouths turned into speakers. I am using 1.5 V motors and I
>need advice on what to use for my audio output. The signal
>from my CD player is too weak to power the motor.
>Thanks, Jeff Friedman
>
>
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