This is a small circuit which operates on 12 volts DC.  Multiple inputs are provided.  Input logic is negative, that is inputs are normally high and are pulled low (ground) when activated.  (This is compatible with standard alarm panel outputs.)  Inputs are logically 'OR' ed so that the output pulse is generated only on the release of all inputs.   At the end of the last input, the circuit generates an (approximately) 0.5 second ground pulse used to (hardware) reset the Dialler module.

This is a small circuit board.

This circuit is not in volume production.  Units will be provided in single quantities to new customers at $35.00 each (subject to order acceptance).

Request information from:
Paul Robinson, P.Eng., Dartmouth, Nova Scotia, Canada
 

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Updated: February 10, 2000