This 9-pixel circuit has been implemented with 9 LDRs and can be coupled to a processing system for an elementary artificial eye. The circuit is from Radio Electronics, November 1986.
Found in a 1969 documentation, this neon lamp circuit may have the number of steps increased. The power...
The basic idea of this circuit is that, with a touch of the car headlight switch, the light...
This circuit allows selective relay actuation in the same line according to the applied voltage....