This circuit was found in a 90's EDN. The circuit has a well-known configuration. The voltage obtained depends on the number of diodes. Capacitors depend on the desired current.
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...