Obtained in a 1968 Electronics World, this circuit uses transistors from the time and the sensor is a common LDR. The component values are for scales from 0.01 to 100 foot-candle.
This circuit is from a 1987 magazine, but it can still be easily assembled, as the components are...
This circuit uses only transistors, producing a pseudo-sequential effect with 6 LEDs. The circuit is...
This circuit is from an Italian publication from 1988 but can still be easily assembled....