We found this time base circuit in a timer project from the August 1972 Radio Electronics magazine. The circuit takes advantage of the 60 Hz signal from the power grid.
This simple circuit for headphones or small speakers was found in documentation from the 90s. The...
In the figure we have the way to implement a monostable with a comparator 139, 239 or 339. The...
This circuit was obtained from a 1977 documentation. The circuit does not require a symmetrical power...