//0x27 là địa chỉ màn hình trong bus I2C. Phần này chúng ta không cần phải quá bận tâm vì hầu hết màn hình (20x4,...) đều như thế này! //16 là số cột của màn hình (nếu dùng loại màn hình 20x4) thì ...

int led = 13; // the pin that the LED is atteched to int sensor = 2; // the pin that the sensor is atteched to int state = LOW; // by default, no motion detected int val = 0; // variable to store the ...

We've all heard that "if you want something done right, you have to do it yourself." And that’s usually fine when it comes to ...

Abstract: In this paper, we review the device structures and present the simulation results of four single-domain LCDs with a quasi-collimated backlight and a free-form optics-engineered diffuser.

Among the things I have not missed since entering middle age is the sensation of being an absolute beginner. It has been decades since I’ve sat in a classroom in a gathering cloud of incomprehension ...