This 2002 circuit uses many more electrical components than electronics. The keys are common, and the alarm is a common clock that has this feature.
The circuit shown is from National Semiconductor, having been found in the 1994 Linear Application...
We found this circuit in a 70s American documentation. The integrated circuits are from that time....
This circuit is from a 1978 French magazine Electronique Pratique. The magazine no longer exists, but...