PWM 驱动芯片，其 PWM 计数器的计数速率最多可达 25MHz，其影像刷新率的最大值也只能达到 360Hz；即使将计数速率提高为 30MHz，影像刷新率亦至多只能提升至 420Hz。 可以看出，采用传统的PWM驱动芯片，LED屏幕显示的刷新率效果十分有限。 （传统PWM驱动 显示效果） ...

Looking for a simple circuit to control the light intensity of Light Emitting Diodes (LEDs) or similar lighting sources? Here is an Arduino based circuit with three independent pulse width modulated ...

PWM 调光不像模拟调光那样线性。当 PWM 控制输入变低时，输出电压不会立即关闭，因为输出电容需要通过 LED 负载放电。当 PWM 输入变高时，稳压器对 ...

–PWM会受到开关2.5ms典型上升时间的一定限制。 (原文刊登于EDN美国版，参考链接： DIY LED display provides extra functions and PWM，由Ricardo Xie编译) ...

汽车大灯制造商可以使用SEPIC拓扑来实现直接由车辆电池供电的远光或近光LED阵列驱动器，而非使用升压后接降压转换器的传统两级拓扑或全桥降压-升压拓扑。AL8853AQ的SEPIC功能支持经济高效、简单的降压-升压型拓扑，非常适合平视显示系统，即汽车设计中日益流行的功能。

Diodes公司推出升压/SEPIC 控制器在车用照明产品应用中实现50kHz LED宽PWM调光 2023年09月26日 15:22 电子产品世界 ...

The PWM sketch works to vary the output linearly, however, the light outputted by the LED does not change in a linear manner. When applying the scientific metric of ‘perceived brightness versus time’ ...

Among all the Arduino boards, the Uno is most folks' go-to choice, and for good reason. It's the perfect platform to get started with Arduino, it's capable enough to handle a wide range of tasks, and ...

Posted in Arduino Hacks, LED Hacks Tagged 595, pwm, shift register ← Hackaday In The Social Tangle Roomba Used To Map Indoor Air Quality → ...

He built an RGB LED circuit controlled by a PIC12F683 microcontroller, which shines into a hand-etched plexi-glass panel. The LED color is controlled using PWM, as you would expect.