stm32cubemx

It’s time to use MAX7219 in a slightly different way than it was probably originally designed for. We will create graphic LED displays controlled by a higher-level graphics library. This will work exactly the same way as, for example, OLEDs. See how simple it is 🙂

Recently we made a 7-segment display multiplex itself thanks to the magical MAX7219 chip. Today I’ll show you how these chips let you handle a theoretically infinite number of displays. We’re talking about the daisy-chain connection these wonderful chips offer. In a moment you’ll see how, without using more pins, you can connect and control as many displays as you want. Let’s get to it!

I remember how many years ago multiplexing an LED matrix was a nightmare for me. Geez… how badly I went through it. From today’s perspective I don’t understand my past self at all. It really isn’t as difficult as it seemed to me back then. Today it’s even simpler! We have specialized multiplexing chips designed for LED displays, and that’s beautiful. Let’s get cracking!

Probably every one of my readers has dealt with some wearable device, the so-called wearables. Even the simplest fitness bands have a built-in heart rate sensor that most often measures at the user’s wrist. It turns out this isn’t some mysterious technology available only to a closed group of consumer electronics manufacturers. Read more

I remember when the Nokia N95 hit the market, which was a huge technological leap. It had a built-in accelerometer thanks to which, among other things, the interface would change orientation by itself. Today this probably doesn’t impress anyone anymore, but in 2007 an app with lightsaber sounds triggered by

Winter is approaching, so the media will once again be loud about the smog prevailing over Poland. Moreover, the authorities probably have no intention of moving away from coal, so we have to cope with pollution somehow. As a result, air quality sensors have become popular in recent years, and today I’ll be looking at one of them.