> From: "Mike \"Rocket J Squirrel\" Elliott" <camping.elliott@GMAIL.COM> > Date: Mon, 18 Jun 2007 11:44:19 -0700 > > I want to find a simple low-voltage alarm to add, too. I built mine out > of parts I found in the junk drawer here, so I'm no help. Does anyone > know of a cheap and cheerful off-the-shelf alarm? No. I do have a fairly simple roll-your-own idea, though... Your average 30 A automotive relay in the 1" black cube, once picked up, will drop out at somewhere around 9 V. You could use a couple of 1N4001 diodes in series with the coil to raise the drop out voltage, and use the contacts to trigger an alarm. Problem: the coil will draw around 0.1 A continuously, which is a bit much for what it does. Maybe a solid-state relay could be used in the same way with less current draw. Matt Roberds |
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