This sensitive circuit for triggering relays was found in an old English publication. It works with alternating signals applied to its input. Transistors are general purpose types.
This monostable circuit appeared in Radio Electronics magazine in October 1965. The circuit...
The presented circuit produces the sound of a fireman's siren. In place of the output transformer with...
The circuit shown in the figure was suggested by Maxim (www.maxim-ic.com) based on the DS2786B...