With this circuit, using a single control voltage, you can increase the brightness of the lamp while the brightness of another decreases. The circuit applies only to incandescent lamps.
This circuit is from an old American publication, but it can be easily implemented with modern...
Found in a 1960 Mullard transistor manual, this circuit uses components from the time....
This circuit was obtained in the publication 101 Electronics Projects of 1979. The circuit can be...