The purpose of this circuit is to produce a quick discharge on a shorted battery to attempt its recovery. The diode must be high current and the transformer too.
This configuration has already been found in other manuals, as the LM117 is manufactured by...
This is the radio receiver for the previous infrared alarm radio transmitter. It contains the...
This circuit, from an old publication from the 70s, can be assembled with a 2N2646 unijunction...