This assembly is from 1957 from a Raytheon manual, but can be modernized using a BC548, 6 V power supply and common 100 mA relays.
Using two of the 4 NAND gates of the integrated 4001, the circuit in the figure activates the...
This traditional 3-channel mixer configuration with FET appears elsewhere on this site. The FET...
This circuit was obtained in an old American manual. The circuit is valid for any operational. The...