多路调光灯 4个LED定义成4个可独立调节亮度的调光灯。用4路PWM方式的输出分别点亮4个LED，各用2个按键对PWM的输入进行LED的亮度控制（2个按键分别为亮度增减，步长自行定义，要求可以实现按总亮度的1 ，5 ，10 和20 等不少于4种步长，由SW3的DIP开关设置）。4路LED间的亮度变化可以按照一定规律关联。-Multi-channel dimmer LED lamp 4 is defined as four independently adjustable brightness dimming lights. With 4 PWM outputs of the way light 4 LED, each with two buttons on the PWM input for LED brightness control (2 keys are brightness changes, step self-definitions, requirements can be achieved by total brightness 1 , 5 , 10　and 20 , etc. at least four kinds of steps from the SW3 DIP switch settings). 4 LED brightness changes among the association can follow certain rules.