This mono circuit for 10 LEDs was found in the January 1991 Radio Electronics magazine. It is powered by 12 V.
The purpose of this game obtained in a 1998 documentation is to guess the number that the circuit...
Indicated by a Popular Electronics of the 90s originally to measure the light determining the exposure...
This circuit provides a constant current of 1 mA, stabilized by an LED, which can be equivalent to that...