This circuit also appears elsewhere on this site, obtained from other sources. This is an 80's American schematic book. Instead the lamp can be used white high-brightness LEDs.
This circuit was found in July 1986 Radio Electronics magazine. The maximum current is 1.5 A. The...
This circuit activates 5 LEDs according to the level of the analog input signal and can be used...
This circuit is from an old American documentation and its use in motorcycles with 12 V is...