IoT For Makers

In a previous post, I showed you how to display a variety of non-English languages ​​on an LED matrix. In this post, I will look at displaying colorful text that has been image-processed on the LED, rather than just displaying simple text. The image processing content introduced in this article is related to the previous post and https://opencvcooking.blogspot.com/2019/12/basic-cooking-2-pil-text.html . Outline Text Outline text is the text extracted from the outline of the font as shown in the following figure. gimp and other image editing tools make it easy to create outline text images. Let's see how to make it using PIL. In the previous OpenCV blog, the results of the processing were output to a computer screen or file, but this time to the LED matrix. <Outline text Example> See the previous post on how to handle fonts in PIL. import argparse import time , os from PIL import Image, ImageDraw, ImageFont from rgbmatrix import RGBMatrix, R...

It shouldn't be a problem in English-speaking countries, but some countries need to do some work in order to display their characters on LEDs. I am using DietPi OS installed on Raspberry Pi. And my native language is Korean, not English. In most cases, I use ssh on my PC to work on Raspberry Pi. And since the operating system of the PC is Korean Windows 10, there is no difficulty even if it happens to use Korean in Raspberry Pi. However, if you need to output Hangul(Korean language name) directly from Raspberry Pi, like LED output, you need to do some work. This content can be applied to Chinese and Japanese as well as Korean. Later I will show a sample using these languages. Unicode font To display the native language, you must first obtain a Unicode font that contains the native language. Be Careful : Do not use the font of the Windows operating system without permission. There is a risk of copyright problems. I will use Pan-CJK (China, Japan, Korea) Font made by Adobe an...

Do you know ClockClock24? ClockClock24 is kinetic art by Humans since 1982. Twenty-four analog clocks form a large digital clock. Clever arrangement of the clock hands transforms the analog clocks into seven-segment displays. <captured from https://www.humanssince1982.com/clockclock24>  Here's an introduction video. This fantastic clock can also be purchased directly online Moma Design Store . But the price is not easy. The price is surprisingly 5,400 $ <Moma online store> Make your own ClockClock   Now  let's build our own clockclock. Materials Here's what you need for this post: Raspberry Pi 4B(2GB Memory) : 1EA Electrodragon RGB Matrix HAT : 1EA P3 64X64 RGB LED Matrix : 3EA Hub75 cable : 3EA LED Power cable : 2EA 5V 20A Power supply : 1EA This is a picture of three 64X64 panels connected. Jumper settings for 1/32 scan mode 64X64 RGB LED matrix has 1/32 scan modes. So you must use E signal pin. Henner Zel...