Ionization chamber smoke detector

Posted on Sep 22, 2012

Battery-operated, ionization chamber smoke detector includes a circuit to generate a unique alarm when the battery reaches the end of its useful life. The circuit uses the MCMOS MC14572 for two alarm oscillators (smoke and low battery)

Ionization chamber smoke detector
Click here to download the full size of the above Circuit.

This circuit additionally uses five discrete transistors as buffers and comparators.

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