This logic tip latches on pulses. The TTL circuit was suggested by Radio Electronics magazine in August 1977. The power supply must be 5 V.
Found in Popular Electronics from the 90s, this circuit uses a 2N2646 and a general-purpose transistor...
The crystal frequency of this circuit found in an American documentation is limited only by the...
These two circuits were found in Radio Electronics magazine from February 1960. The transistor is a power...