IoT For Makers

A few days ago I received four P2.5 126x64 RGB LED matrix ordered from AliExpress. In this blog, I will connect four LED Matrixes to create a 256X 128-sized display. Preparations are as follows. Materials Raspberry Pi 4 : 1 P2.5 128X64 RGB LED Matrix : 4 Electrodragon RGB LED Matrix HAT :1 Hub74 cable : 4 LED Power cable:2 5V power supply : 1 <P2.5 128X64 4EA RGB LED Matrix> <hub75 cable    LED power cable  5V Power supply> RGB LED Matrix HAT setup The 126X64 size RGB LED Matrix is ​​mostly 1/32 multiplexed. Be sure to check the manual of the LED matrix you use for exact details. If you're in 1/32 multiplexing mode, you'll need to tweak some of the Electrodragon HAT's jumper settings. <Electrodragon HAT jumper settings for 1/32 multiplexing> And I'm going to use 2 Hub74 sockets at the same time. Therefore, I will connect the HUB 74 sockets P1, P2 of Electro Dragon HAT together to the LED matrix. <Electrodragon HAT HUB 74 socket P1, P2 are connected ...

last updated 2020.04.17 : update for ESP32 I like MCUs like arduino uno, esp8266, esp32. But I prefer single-board computers like Raspberry Pi and Jetson Nano. This is because a single-board computer can install Linux and use great tools like OpenCV. However, many makers are using the Arduino-based mcu and often produce amazing results. The RGB LED drive library for the ESP8266 and ESP32, which will be introduced in this post, also demonstrates great features. I received an RGB LED matrix shield for ESP8266 from Electrodragon a few days ago. After receiving this product, I also looked at how to drive the RGB LED matrix using the ESP8266. <Electrodragon ESP8266 RGB LED sheild> This product has the same pin configuration as the shiled product made by Brian Lough. Brian Lough's products are available at https://www.tindie.com/products/brianlough/d1-mini-matrix-shield/ for 14$. And Electrodragon products are available for purchase for $ 3.4 at https://www.electrodr...