This TTL sequential flasher circuit was found in the January 1981 issue of Radio Electronics magazine. It is powered by 5 V. The frequency can be adjusted by R1.
This circuit is from a Radio Electronics magazine from August 1974. It used one of the first...
This circuit was found in an English magazine from 1973. The magazine no longer exists, but the...
This circuit for measuring very low currents was found in an American documentation from the...