This circuit digitally counts input pulses. The circuit from a November 1970 Radio Electronics uses unijunction programmable transistors. Note the counted pulse duration.
This motor logic control was found in the September 1985 issue of Radio Electronics magazine. The...
This 6-transistor transistor radio is a RCA product from the 1960s. The circuit is powered by a 9...
We found this circuit in an American brochure from the 90s. In it we have the way to implement a 4-input...