Date:         Wed, 16 Dec 2009 21:34:49 -0500
Reply-To:     Mike S <mikes@FLATSURFACE.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Mike S <mikes@FLATSURFACE.COM>
Subject:      Re: Audible Idiot "Light"...EE Inventor Wanted
Comments: To: Rocket J Squirrel <camping.elliott@GMAIL.COM>
In-Reply-To:  <4B298C46.1070201@gmail.com>
Content-Type: text/plain; charset="us-ascii"; format=flowed

At 08:41 PM 12/16/2009, Rocket J Squirrel wrote...
>I'll second Richard's call for audible alarm.

Here's a schematic: http://www.flatsurface.com/pics/buzzer.jpg

Could be easily built on a piece of perf-board.

Radio Shack parts:
Buzzer 273-066 $5.49
http://www.radioshack.com/product/index.jsp?productId=2062399

2n2904 transistors 276-2016 $0.79
http://www.radioshack.com/product/index.jsp?productId=2062609

1n4148 diodes 276-1620 $2.59/50
http://www.radioshack.com/product/index.jsp?productId=2062587

3.3K ohm resistors 271-1328 $0.99/5
http://www.radioshack.com/product/index.jsp?productId=2062345

Perf board 276-148 $1.99/2
http://www.radioshack.com/product/index.jsp?productId=2104052

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