This circuit was obtained from an 80s factory manual. The integrated circuits used are uncommon today, but the diagram is for reference only.
We found this circuit in a 90s Electronic Design. The frequency is given by the network R C1, C2....
Recommended by 90s a Radio Electronics, this unit uses a transformer with a 70 V x 5 A secondary,...
This “Half adder” circuit uses NAND gates from a 7400. The power supply must be 5 V. ...