Found in a 1970 EEE, this circuit generates signals that depend on the C1 capacitor. Transistors are general-purpose types.
This circuit supplies a voltage of 42 V, plus a symmetrical voltage of 12 V with 1 A. The voltage...
The operational ones used in this project are old types from National Semiconductor, since the...
This circuit is from a 1973 documentation, using germanium transistors common at the time. The...