This circuit was found in a 1967 US publication. In it we have the implementation of a ring counter using only relays. Relay free contacts can trigger indicator lamps or LEDs.
We found this circuit in the September 1994 issue of Electronics Now magazine. The circuit uses...
June 2017 - NXP's new 4 Mbit capacity NXH5194 memories are available from Mouser Electronics...
This circuit was found in a March 1988 Radio Electronics. The voltage scale is set at R3. 19 LEDs...