Crowbar Circuit

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Subject:		Crowbar Circuit
From:		Peter Mather (peter@mather.com)
Date:		Thu Nov 19 - 11:24 AM

If anyone is interested I've posted a circuit and veroboard layout for a 
tested and working crowbar circuit based on the MC3423 chip on the blog for 
my Wittman Tailwind build. Total parts cost around $5.

http://tailwindbuild.blogspot.com/2009/11/15th-november-2009-overvoltage-crowbar.html

Click on the pics/diagrams to enlarge

The variable resistor allows the crowbar voltage to be set as required and 
compensates for differences in the internal reference voltage on the MC3423.

Best regards

Peter