We found this simple circuit in December 1975 Radio Electronics magazine. The integrated circuit is the 4009 CMOS, and the circuit works in both TTL and CMOS depending on the power supply.
This circuit was suggested by National Semiconductor in its Linear Application Handbook. The...
The integrated circuit used in this power supply is no longer very common in power supplies today....
This small battery-powered high-voltage generator was found in Radio Electronics magazine from...