More inputs can be added to this adder that we found in the January 1995 Electronics Now magazine. Other operational ones can be used.
This circuit is from a 90's Radio Electronics. The circuit operates accurately up to about 15 kHz...
This circuit is from a 1980s Signetics documentation but is valid for modern operating. Next to...
This circuit from a 1979 publication uses FETs which can be BF245 and integrated circuits, unlike...