The circuit shown in the figure below is from the 1993 Linear Technology Applications. The operational ones used are uncommon and the use of equivalents can be analyzed.
This siren configuration found in a documentation from the 1980s can also be seen in many of our...
This alarm is either activated or triggered after a certain amount of time, giving the owner time...
This timer circuit is based on an integrated circuit configured as stable and a 14-stage 4020...