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DIY 12V LiFePO4 UPS for Home Assistant Green and Xfinity XB7 modem. Victron BP-65 LVD, MOSFET ideal diode, 13.3V float, Shelly Plus Uni
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DIY UPS for Home Assistant Green & Xfinity XB7 Mod

bill-collisBill Collis

Two NDIR CO2 nodes (SCD30 + XIAO ESP32-C3, ESPHome/HA) built so a dead sensor reads unknown and raises a fault, never a flat number.
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CO2 Monitor That Fails Visibly

bill-collisBill Collis

TL;DR: HLK-LD2410C 24 GHz radar + VEML7700 lux + Seeed XIAO ESP32-C3 on a 44x33mm carrier that actually holds a still human.
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24 GHz mmWave Presence Node

bill-collisBill Collis

500Ah LiFePO4 Battery Bank Monitor Upgrade
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From Voltage Logging to Coulomb Counting

bill-collisBill Collis

A simulation on an Arduino with touch LCD of just enough of the Palm III look and feel to resurrect an app I wrote almost 30 years ago.
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Palmetto-III

mark-wilsonMark Wilson

Wireless status display for Discover Energy's AES Batteries with the Lynk II controller.
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Discover Energy AES Battery Display

brian-cornellBrian Cornell

Text on a small display should come alive. It started with clock digits made of Bézier curves; this is where the idea went.
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Bringing Text to Life on an ESP32

anton-petrusevichAnton Petrusevich

General-purpose open-source dual-arm mobile manipulator for embodied AI. Teach it by demonstration: show, correct, judge. rc.1: 20 Nov 2026
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OpenAMRobot 2.0 - teach a robot, don't program it

alex-reznichenkoAlex Reznichenko

ESPos is an experimental operating system for ESP32 microcontrollers, developed without the ESP-IDF runtime or FreeRTOS.
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ESPos – Bare-Metal Operating System for ESP32

oldaOlda

Open-Source Web-GUI Embedded Multitool based on Raspberry Pi Pico
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Pico.Lab - Web-GUI Embedded Multitool

maxkMax.K

High-Speed Sub-50 µm Laser Direct Imaging (LDI) & Additive Manufacturing
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Hexastorm: Rotating Prism Laser Scanner

hexastormHexastorm

I wanted to "see" the tides so I built this tide clock
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A water based tide clock

jp-gleyzesJP Gleyzes

A Sharp LS013B7DH03 reflective monochrome memory-LCD breakout with a 128×128 pixel array.
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Sharp 1.28-inch 128x128 Memory LCD Breakout

michael-yimMichael Yim

A solenoid cabinet-lock assembly with a three-pin breakout and active-high release input.
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Solenoid Door / Cabinet Lock Assembly Breakout

michael-yimMichael Yim

A 23K640 SRAM breakout providing 8KB of external memory over SPI.
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SRAM 64Kbits (8KB) 23K640 SPI Breakout Board

michael-yimMichael Yim

A 0.97-inch monochrome e-paper breakout with SPI and an onboard 8KB SRAM.
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Tiny 0.97" Mono eInk ePaper SPI 184x88 Display

michael-yimMichael Yim

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