Electronics: 29th April 2025

Faikin Remote (revk.uk, 2025-04-22). RevK® discusses the Faikin Remote board for controlling Daikin air conditioners, featuring WiFi, MQTT, and a simple joystick interface, with options for CO₂ sensing and environmental monitoring

Zig Smart Lights; Zapping the Snake ⚡ (dbushell.com, 2025-04-23). David Bushell discusses his transition from Home Assistant to a custom Zig service for controlling smart lights, detailing programming with Zig, including using UDP packets and packed structs

PiKVM for a remote console (nelsonslog.wordpress.com, 2025-04-26). Nelson explores PiKVM for remote console usage, highlighting Raspberry Pi Zero components, power challenges, a user-friendly web interface, and advanced capabilities like USB device detection

Report proper RATGDO door state in home assistant (techblog.jeppson.org, 2025-04-22). An individual shares their experience wiring a RATGDO device with a Zigbee sensor for Home Assistant to report garage door states, detailing their solution to interference issues with a specific configuration

Eurorack Knob Idea (mitxela.com, 2025-04-24). Eurorack Knob Idea combines a magnetic encoder (AS5600) with a TRS jack to create a hybrid knob and patch cable, allowing unique control over modular synth setups

Echo – Open Hardware Music Player (github.com, 2025-04-23). Echo is an open hardware music player designed for Rockbox firmware, featuring a D-pad, multifunction buttons, and extensive storage with a removable memory card slot, using KiCAD for design and FreeCAD for a 3D-printable case

Boxie – an always offline audio player for my 3 year old (mariozechner.at, 2025-04-27). A DIY offline audio player called Boxie for children, built using an ESP32-S3 microcontroller, custom PCB, and a 3D printed enclosure, designed for durability and ease of use

My Pop'n Music Playstation controller (macoy.me, 2025-04-24). Macoy Madson documents the DIY process of building a custom Pop'n Music PlayStation controller using birch plywood, Adafruit KB2040, and specific micro-switches for improved gameplay experience

Boxie - an always offline audio player for my 3 year old (mariozechner.at, 2025-04-26). A portable audio player called Boxie was created for a three-year-old, featuring a Gameboy-like design, ESP32-S3 processor, micro SD storage, simple navigation buttons, and robust components ensuring offline functionality and durability

Duppa I2C MIDI Controller PCB Design (diyelectromusic.com, 2025-04-27). The Duppa I2C MIDI Controller PCB design facilitates a simple carrier PCB for a Waveshare Zero microcontroller and a Duppa LED Ring, focusing on MIDI OUT functionality and PCB footprint efficiency

Duppa I2C MIDI Controller 3D Print Case (diyelectromusic.com, 2025-04-27). A DIY 3D printed case for the Duppa I2C MIDI Controller utilizes OpenSCAD design techniques, featuring snap-fit assembly and LED accommodations, suitable for microcontroller experimentation

A DIY digital stethoscope for cats (davidrevoy.com, 2025-04-24). Using a cheap stethoscope and a lavalier USB microphone, a DIY digital stethoscope was created to monitor a cat's heartbeat, recorded and analyzed to track its health effectively

EclairM0, the pocket notepad (hackaday.com, 2025-04-28). The EclairM0 is a compact, open-source pocket notepad with a SAMD21 microcontroller, 14-button input, SSD1306 OLED display, and TinyGo firmware, designed for USB peripheral functionality in a lightweight 15-gram package

Onkyo Receiver Saved With An ESP32 (hackaday.com, 2025-04-24). Bill Dudley revived a faulty Onkyo AV receiver by replacing its broken DSP and microprocessor with an ESP32, enabling new features like Internet radio and Bluetooth streaming

The Evertop: a Low-Power, Off-Grid Solar Gem (hackaday.com, 2025-04-23). The Evertop, powered by an ESP32, is a portable IBM XT emulator featuring a solar panel, 20,000mAh battery, and a low-power 5.83-inch e-ink display, designed for off-grid computing enthusiasts

I Built a PLAYABLE Pixelboard with Tetris & Snake (gregraiz.com, 2025-04-23). A DIY 16x16 LED matrix display named PixelBoard brings retro games like Tetris and Snake to life, powered by an ESP32 and featuring a web-based control interface for custom designs and settings

Berkeley Humanoid Lite – open-source robot (lite.berkeley-humanoid.org, 2025-04-26). Berkeley Humanoid Lite is an open-source, 3D-printed humanoid robot featuring a modular gearbox, developed for accessibility under $5,000, emphasizing customizability and utilizing reinforcement learning for locomotion control

The Danglepoise (sallery.co.uk, 2025-04-23). Gavin Sallery explores creating a motorized rise and fall pendant lamp using concepts such as slip rings, stepper motors, and custom electronics, while addressing challenges related to design and functionality

Adventures in Mad Science: When Tentacles Attack (tacit.livejournal.com, 2025-04-22). The project involves creating a 3D-printed articulated tentacle core, using soft TPU, and plans for an Arduino and sensors to enable autonomous movement and interaction

LidarBot (kevsrobots.com, 2025-04-26). LidarBot is a 3D printed robot that employs a Raspberry Pi Pico and LD06 Lidar sensor for navigation, designed as an educational tool for teaching programming and robotics concepts

Build a 65mm micro drone from the Mepsking kit parts (blog.georgi-yanev.com, 2025-04-27). Georgi Yanev builds a 65mm micro drone using Mepsking kit parts, sharing insights on FPV setups and his return to the hobby, along with references to ExpressLRS and Taranis X-Lite

I open-sourced my AI toy company that runs on ESP32 and OpenAI realtime (github.com, 2025-04-22). ElatoAI is an open-source project offering real-time AI speech using OpenAI's Realtime API on Arduino ESP32, featuring Secure WebSockets and Deno edge functions for over 10 minutes of uninterrupted global conversations

Dad and the Egg Controller (2018) (pentadact.com, 2025-04-26). Tom Francis reflects on his father's inventive spirit while exploring the Egg Controller, a custom device designed to regulate the temperature of a Big Green Egg barbecue using proportional-integral-derivative control

I couldn't wait for a TRMNL device, so I made my own (stavros.io, 2025-04-24). A tech enthusiast created a DIY TRMNL device using a Waveshare 800x480 e-ink display and ESP32 driver, overcoming licensing barriers to run TRMNL's firmware and achieve functionality at a fraction of the cost

Jonathan McDowell: Local Voice Assistant Step 1: An ATOM Echo voice satellite (earth.li, 2025-04-24). The setup of a local voice assistant using Home Assistant and an ATOM Echo device, including custom wake word functionality and building binary components for voice recognition is detailed in a series of upcoming posts

ESP-SparkBot：Large Language Model Robot with ESP32-S3 (developer.espressif.com, 2025-04-23). ESP-SparkBot is a versatile AI robot with ESP32-S3, featuring voice interaction, facial recognition, offline speech recognition, and motion detection, utilizing tools like the OpenAI ChatGPT model and ESP-SR library

Trying out a cheap USB VK-172 GPS dongle on a Mac (jeffgeerling.com, 2025-04-25). Exploring the VK-172 USB GPS dongle on macOS, utilizing PyGPSClient and GPSd for timing data, notes on potential counterfeit hardware, and considerations for GPS setups on devices like Raspberry Pi

XOR Gate as a Frequency Doubler (hackaday.com, 2025-04-25). An obsolete XOR gate was used to create a simple frequency doubler using an RC network. Modifications included a 1K resistor to improve functionality, with variations based on the gate type affecting performance

DIY Precision Agriculture: Fertilizer Monitor with Raspberry Pi Pico Part 2 (jpaul.me, 2025-04-28). Justin Paul successfully installed a DIY fertilizer monitor using a Raspberry Pi Pico, improving crop consistency and efficiency in his corn planting process, identifying issues with fertilizer flow in real-time

Friday 25 April 2025 (nedprod.com, 2025-04-25). Niall Douglas tests BMP280 and BMP390 sensors for measuring airflow, exploring sensor accuracy and potential alternative sensors to optimize airflow control in his ventilation system

Building the EAntenna Dual Band Moxon for 10m/6m (rz01.org, 2025-04-24). A build guide for the EAntenna Dual Band Moxon Antenna covering 10m/6m, detailing assembly steps, components like 20mm and 13mm tubes, and installation of balun and isolators with good SWR results

Towards the cutest neural network and dubious ideas for a code CAD language (kevinlynagh.com, 2025-04-27). Kevin explores using a simple neural network for sensor pose estimation and designs a code CAD language with multiple dispatch, discussing challenges faced with quantization and user-friendly textual notation

I designed my LED matrix PCB with code (docs.tscircuit.com, 2025-04-25). This tutorial guides users in building a 3x5 LED matrix with a Raspberry Pi Pico and tscircuit, covering connection techniques, schematic capturing, and component chaining using WS2812B IC LEDs

Using a Keyboard with USB Host (learn.adafruit.com, 2025-04-23). This guide explains how to interface USB keyboards with microcontrollers using CircuitPython and Arduino, including handling different keyboard layouts and managing the complexities of the USB protocol

Pinout Leaf Generator (splitbrain.org, 2025-04-27). The Pinout Leaf Generator creates custom pinout diagrams for electronic devices like Raspberry Pi and ESP32. It uses JavaScript and YAML to automate SVG generation, simplifying pin alignment in projects

Linux & FPGA, The Perfect Match? (ejaaskel.dev, 2025-04-24). Combining Raspberry Pi 5 and Basys 3 boards for UART communication in FPGA projects, utilizing tools like Vivado and covering essential concepts from FPGA programming to serial communication

My new Raspberry Pi Zero web server (paulcapewell.com, 2025-04-28). A Raspberry Pi Zero has been transformed into a simple self-hosted web server, utilizing SSH, command line, and ChatGPT for configuration, while also considering security and low power consumption through potential solar power usage

Pycon.de: using python to enter the world of microcontrollers - Jens Nie (reinout.vanrees.org, 2025-04-25). Jens Nie discusses microcontrollers like ESP32 and STM32 at Pycon.de, highlighting MicroPython's simplicity and features, such as low power consumption and capabilities for home power monitoring

I Miss My Pi Cluster (esgeroth.org, 2025-04-27). After retiring his Raspberry Pi Kubernetes cluster, the author misses its unique advantages and considers creating a new one, despite challenges with storage latency and hardware limitations

Rohde & Schwarz AMIQ Modulation Generator - Teardown and Analog Deep Dive (tomverbeure.github.io, 2025-04-26). Explore the Rohde & Schwarz AMIQ modulation generator's functionality, featuring 2-channel AWG, high-precision DACs, and software integrations, alongside its teardown insights revealing the analog circuitry and testing capabilities

Improving motor constant calibration in moteus (jpieper.com, 2025-04-24). Improvements in moteus motor constant calibration enhance measurement accuracy for resistance, inductance, and torque constant, utilizing advanced algorithms and tools to boost consistency across various motor types and controller configurations

Kaleidoscopico (linusakesson.net, 2025-04-25). Kaleidoscopico is a Raspberry Pi Pico 2 demo utilizing 17,000 lines of RISC-V assembly, featuring advanced video generation techniques, PWM audio, and unique data handling via state machines and DMA

TinyML for Speech Recognition (arxiv:cs, 2025-04-22). A quantized 1D CNN model for speech recognition was developed for IoT devices, achieving 97% accuracy using a new dataset and Edge Impulse, capable of processing 23 keywords for complex commands on Arduino Nano 33 BLE Sense