This circuit was published in the December 1987 Radio Electronics magazine. It uses two 555s to drive 6 flashing LEDs.
To divide by an odd number‘ means not only the need for flip-flops, but some additional logic too. The...
We find this circuit in 1975 documentation. The circuit can be used with other operational...
Found in an 80's documentation this circuit uses an integrated from the uncommon era today. Other...