This xenon flasher version for the power grid is from an 80's EDN. The circuit uses a folder and a pulse transformer to trigger the lamp. C1 determines the intensity of the pulses.
The figure shows how to couple two TTL circuits using an optical coupler to obtain isolation. The...
We found this circuit in an English publication from 1963. The circuit uses germanium transistors of the...
This two-port configuration of the 4001 was found in the April 1988 issue of Radio Electronics magazine....