This TTL heads or tails circuit was found in the July 1973 Radio Electronics magazine. The LEDs are types of the time. Note the symbolic representation of this component.
This traditional metronome configuration uses unusual transistors in the original version, but it...
This circuit was found in Texas Instruments documentation from 1968. The transistors are from that...
This sensitive field strength meter was found in 1993 documentation. The instrument may be the...