This article provides a guide on building a DIY high-end Bluetooth speaker in only 30 minutes using an ESP32 and simple hobbyist components. Using a LILYGO T-Display board, which supports the Bluetooth Classic protocol required for A2DP audio streaming, the project pairs with a MAX98357A module to act as a digital-to-analog converter and amplifier. The setup uses the I2S interface for audio transmission and can even display track information and connection status on the onboard TFT screen. It is an excellent, quick project for electronics enthusiasts looking to repurpose spare parts into a functional, polished audio device.
A 6502 based laptop design. Specs include a 65C02 running at 8MHz, 46K RAM, BASIC in ROM, 65C22 VIA, 9" display, built-in keyboard, Compact Flash storage, 10000mAh battery, USB-C powered/charged, serial console, and an internal expansion slot. The project details the build process, current status, memory map, and custom BASIC commands.
This article details a DIY digital barograph project that replaces traditional mechanical barographs with a modern digital solution using a BME280 pressure sensor, an ESP32 microcontroller, and a 128x64 LCD display. It offers advantages like eliminating paper replacement and reducing maintenance.
A review of the Tiny Code Reader, a $7 QR code sensor, detailing its setup, functionality with I2CDriver, limitations (tight centering requirement), and internal components (RP2040 microcontroller and Arducam image sensor).
This article details the design and construction of a 512-bit magnetic core memory system running at 200kHz, including the challenges faced, scaling techniques, and practical advice for building your own system.
Building a community around a cheap ESP32 Display with a touch screen. This display is an ESP32 with a built in 320 x 240 2.8" LCD display with a touch screen called the "ESP32-2432S028R".
This article details a DIY presence sensor project inspired by the Everything Presence Lite kit, utilizing a millimeter wave sensor and a BME680 environmental sensor for accurate motion and heart rate detection.
