Patent ID: 11864287

Abstract:
Circuitry to control dimming of a load circuit may be connected between a 0-10 V dimmer that outputs a DC voltage control signal and the load circuit. The circuitry may include a microcontroller that may be programmed to generate a first pulse-width modulated (“PWM”) signal having a duty cycle based on the dimming level configured to be set on the dimmer. A voltage conversion circuit may supply the microcontroller with data relating to the set dimming level. The microcontroller may be programmed to synchronize the first PWM signal with the supplied AC power from the main circuit based on a second PWM signal from a voltage detection circuit, such as a zero crossing voltage detection circuit. The first PWM signal may be supplied from the microcontroller to an on/off switch to chop the AC power waveform at certain intervals and thereby dim the load.