This circuit was obtained in an American documentation from the 80's. The transistors can be equivalent to those indicated and the crystal can reach a few tens of megahertz.
This configuration with the LM111 was found in your factory manual. The circuit can be implemented with...
We found this circuit in Radio Electronics magazine from October 1962. The article announced the...
With the presented circuit, random patterns are generated for the flashing of 8 LEDs, leading to a...