This shunt voltage regulator was found in an Electronic Design from the 90's. The power transistor must be in accordance with the load current and must be equipped with a heat sink.
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...