模拟 PWM 输出控制灯的 10 个亮度级别
LED 一般是恒流操作的,如何改变 LED 的亮度呢?答案就是 PWM 控制。在一定的 频率的方波中,调整高电平和低电平的占空比,即可实现。比如我们用低电平点亮一个 LED 灯,我们假设把一个频率周期分为 10 个时间等份,如果方波中的高低电平占空比是 9:1, 这是就是一个比较暗的亮度,如果方波中...
LED 一般是恒流操作的,如何改变 LED 的亮度呢?答案就是 PWM 控制。在一定的 频率的方波中,调整高电平和低电平的占空比,即可实现。比如我们用低电平点亮一个 LED 灯,我们假设把一个频率周期分为 10 个时间等份,如果方波中的高低电平占空比是 9:1, 这是就是一个比较暗的亮度,如果方波中...
Reconstruction- and example-based super-resolution (SR) methods are promising for restoring a high-resolution (HR) image from low-resolution (LR) imag...
The idea of writing this book entitled “Cognitive Networked Sensing and Big Data” started with the plan to write a briefing book on wireless distribut...
This book describes how global mobile communication was made. It is written for those who want or need to know how this was achieved e.g.: † Young pro...
This books presents the research work of COST 273 Towards Mobile Broadband Multimedia Networks, hence, it reports on the work performed and on the res...