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 have a simple signal tracer circuit to be coupled to the volume control of an AM...
This circuit was found in documentation from the 90s, using components from that time. The...
This circuit, obtained from old documentation, allows the recovery of sulfated batteries. The...