| 摘要 |
A universal digital dimmer is revealed. The universal digital dimmer includes an electromagnetic radiation control circuit, a zero level detector, a leading/trailing edge automatic detector, an encoded signal generator, a no-load detection circuit, a power supply circuit, a dual-core or multi-core microcontroller, a state indicator and an output controller. The dimmer has a leading edge control mode and a trailing edge control mode. The dimmer detects and gets suitable waveform by switching between the leading edge control mode and the trailing edge control mode. Moreover, detection and automatic dimming control are performed independently by the dual-core or multi-core microcontroller. One dual-core or multi-core central processing unit (CPU) of the dual-core or multi-core microcontroller is used for detection operation while the other/another dual-core or multi-core CPU thereof is used for control operation. Thus 0ˆ¼100% dimming range of the load is achieved. The dimmer can work with different loads and the brightness stability is improved. |
