This circuit is from a 1969 EEE magazine. The transistors are from that time, but the circuit can be implemented with modern equivalents, such as 2N2646 for Q3.
This circuit was found in the Linear Technology Applications of 1997. The circuit uses components from...
This is a 5 V power supply from 2002 documentation, suitable for walkmans and diskmans, common at the...
In fact, this 1967 Electronic Design circuit generates two symmetrical ramps whose frequency...