Simple 5V regulator (CB8815E)

This simple 5.6 V regulator circuit was found in a 1966’s Philips. The zener can be changed to obtain other voltages.

Commercial radio 6T 170 (CB18428E)
This Japanese commercial transistor radio circuit was found in a 1967 documentation. The...
Dual Gate MOSFET Oscillator (CB13091E)
The circuit shown in the figure is characterized by stability and the use of a common component. This...
TPS7A19 Linear Regulator with Low Voltage Drop (COM189E)
January 2017 - Texas Instruments' new TPS7A19 Low Voltage Dropout (LDO) linear regulators are now...