Neo Pixel是可寻址的LED，我们可以通过编程，让它显示任何一种颜色或者数字。 Neo Pixel有不同的smd封装，这个项目使用的是Ws2812b-5050 mini RGB。 这种迷你LED的额定电压为3.0V到5.5V，电流为16mA（每个LED）。 NodeMCU有3.3V的稳压器，可以正常驱动所有的LED。 第2步：使用Neo ...

Want to control the colors in your home? Sure, you could just buy a Philips Hue bulb, but where’s the hacking fun in that? [Dario] agrees: he has written a tutorial on building an Arduino-controlled ...

It can be difficult to resist the impulse buy. You see something interesting, the price is right, and even though you know you should do your research first, you end up putting it in your cart anyway.