Open Hardware: ESP32, Raspberry Pi, Teletext, Librem, and More
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CNX Software ☛ Waveshare ESP32-S3-LCD-1.28 development board with 1.28-inch IPS round LCD is available for $15
The Waveshare “ESP32-S3-LCD-1.28” is an ESP32-S3-based display board featuring a 1.28-inch round LCD screen with a 240×240 resolution, driven by the GC9A01 display driver chip. It also includes a Li-ion battery charger, a QMI8658 6-axis IMU (for motion tracking), a USB Type-C connector, and wireless capabilities. This board is quite similar to others like the Lilygo T-RGB, Round Display for XIAO, ESP32-S3 Round SPI boards. However, it’s thinner and more affordable.
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Ivan Kuleshov ☛ PoE+ HAT from Raspberry Pi 4 on Raspberry Pi 5
I have converted the PoE+ HAT for Raspberry Pi 4 to a POE+ HAT for Raspberry Pi 5.
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Andrew Hutchings ☛ Teletext on a BBC computer in 2024
Before the Internet, if we wanted to read up-to-the-minute news or weather, we had Teletext. It is a low-bandwidth text standard that used to be sent via the hidden black border on TV signals. BBC Micro and Master computers had a Teletext character generator chip and mode, which they actually booted into by default. Therefore, Teletext was easy to implement via a small ROM and a modem. I managed to get it running, despite Teletext being killed off years ago. Here is how I did it.
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Martijn Braam ☛ Fixing the Megapixels sensor linearization
Making a piece of software that dumps camera frames from V4L2 into a file is not very difficult to do, that's only a few hundred lines for C code. Figuring out why the pictures look cheap is a way harder challenge.
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Purism ☛ Replacing the Screen of Your Librem 5
Instructions on how to replace the screen can be found in the documentation.