ElectroMaster
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Miniature Loop Alarm - A few months ago, I decided to build a compact, yet effective alarm. My demands were:- simple const
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Miniature Loop Alarm - A few months ago, I decided to build a compact, yet effective alarm. My demands were:- simple const
A few months ago, I decided to build a compact, yet effective alarm. My demands were:- simple construction, reliable operation, very small power consumption, and, most of all, small size. I started with CMOS logic gates, but was soon forced to abandon the concept after a few unsuccessful (and far too complicated) attempts. Then I suddenly realized that a simple transistor switch might do the job and I was right.
As you can clearly see from the schematics, the circuit is utterly primitive...
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