This regulator with current boost and short circuit protection was found in the LM2931 manual that is used in this case. The integrated circuit is not very common today.
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...