Abstract: A keyboard operated controller for controlling a plurality of lighting devices has a memory which includes a plurality of addressed multiposition registers wherein the positions store control indicia for the respective lighting devices. A finger-operated keyboard generates addresses which select the registers to control the states of the lighting devices. There is also provided means for loading the control indicia into the registers via another keyboard.

Abstract: Decorative lighting control is effected by a waveform generator which employs an up-down counter that is alternately stepped in up and down directions. Each time the counter reaches either the maximum or minimum count, it is loaded with a count value representing the width of a pulse to be generated and the direction of the count is changed. A source of the count value is provided by utilizing another up-down counter. The width modulated pulses which result are used to control lighting devices.

Abstract: A keyboard operated controller for controlling a plurality of lighting devices has a memory which includes a plurality of addressed multiposition registers wherein the positions store control indicia for the respective lighting devices. A finger-operated keyboard generates addresses which select the registers to control the states of the lighting devices. There is also provided means for loading the control indicia into the registers via another keyboard.