This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time and are not given information about the driver transformer. Note the high supply voltage.
This circuit is recommended by Texas Instruments in the datasheet of the TL317, equivalent to...
The circuit shown in the figure consists of a low voltage dropout (LDO) regulator for 200 mA using...
This circuit of a Popular Electronics is intended to control a wiper. The circuit consists of a...