We have already presented this circuit, obtained from manuals from other manufacturers of the used integrated circuit. This is specifically from Motorola's 1990 Linear Databook.
In the figure we present a circuit that has an insulation voltage of 2,500 V at 60 Hz and...
We found this circuit in a Popular Electronics from the 80s. The circuit is based on the LM3909, a low...
This timer was found in a 1980 publication. With the BC548 for Q1, an 8-ohm speaker with 6 V power...