We found this circuit in the January 1979 issue of Radio Electronics magazine. Components are still common today, with the 7106 display driver standing out.
This circuit is from a 1998 Electronics Now and can be easily assembled since it uses a common...
We find this circuit in an American 80's documentation. No further information about the...
With this circuit, an external circuit can be controlled by turning it on or off and reversing it (if...