Freeze Alarm (CB14454E)

The circuit of a 1968 publication can be implemented with more modern transistors such as BC548 for NPN and BC558 for PNP.

Universal Active Filter (CB19694E)
This 4-function, high-pass, low-pass, band-pass and rejector filter was found in French...
Water Tank Electronic Float (CB17265E)
This circuit is from 2001 documentation with the purpose of controlling a pump that fills a water...
STK984 190E Integrated Power Module (COM160E)
November 2016 - Mouser Electronics is making available the new N Semiconductor STK984-190E power...