Found in a 70s RCA manual, this circuit uses transistors from the era. Equivalent types can be used such as TIP31 for Q1 and BD135 for Q2.
This symmetric 30 mA x 15 V power supply was found in the Ferranti transistor manual from 1974....
We found this circuit in a technical documentation on thyristors from the 70s. The circuit is set...
August 2017 - Microchip's new ATtiny1617 8-bit AVR microcontrollers running at 20 MHz and 16 kB...