We found this circuit in an old documentation. The integrated circuits used are specific to produce effects and do not admit equivalents, being currently difficult to find.
This alarm circuit with sensors in series was found in the Electronics Now magazine of June 1994....
An advanced motor control software plug-in for Microchip’s MPLAB® X Integrated Development...
This General Electric circuit triggers on after 60 seconds. The circuit is from 1967 but can be...