Research and implementation of a new intelligent dimming system for modern theatre

At present, the digital control technology of single chip microcomputer has been widely used in stage lighting control, but here are still some limitations in the system resources, such as computing speed, storage space and scalability. In order to improve these problems, this paper has proposed a new system design with an ARM microprocessor as the control core. The dimming data transmission follows the DMX512 protocol, so a digital PWM controller was used to generate duty-cycle adjustable PWM signal. The drive circuit controlled the IGBT device to turn-on and turn-off. Therefore, the brightness of lamp is adjustable through the dimming system. The experimental results have shown the perfect performance of simple operation and stable dimming effect of our system, which can satisfied the demand of stage dimming for modern performing places.