12v

a USB power delivery powerbank pcb based on IP5328P chip, feel free to use it

HV UPDI / UPDI programmer software for Arduino (targets Tiny AVR-0/1/2, Mega AVR-0 and AVR-DA/DB MCUs)

12V LiFePO4 UPS for Home Assistant and network gear. First full outage validation (May 6, 2026): 217 min AC-off, 4.18 Ah / 53.3 Wh delivered, graceful shutdown via slope-based cliff_imminent trigger — confirmed end-to-end. Includes design docs and outage reports.

Plan the 12V electrical system of your campervan: wiring diagram, battery, solar, cable cross-section and fuse calculation. Wohnmobil-Elektrik planen und berechnen.

Robot Balance, batterie 12V, WiFi et Bluetooth qui tient en équilibre sur deux roues.

Battery Monitor

Car trailer emulator for use trailer socket as a power source

An ESP32 JBD LFP Pack monitoring/safety cutoff charging solution for use with Dumb LeadAcid chargers.

Browserbasiertes Planungstool für 12V/24V/230V Elektroinstallationen im Campervan – Verbraucher, Batteriekapazität, Leitungsquerschnitte und Solaranlage berechnen.

My 12V DC Light Bulb Experiment Website

Controlling the 4-wire PWM fan cooler using ESP32

Proposal to improve USB PD: standardize 12V, deprecate 15V, and define PD-only Type-C cables.

Electronics (всё в одном репозитории).

Arduino-Based Pump and Fan Controller (OOP, 25 kHz PWM, Separate Hysteresis & Curves for Normal/Benchmark Mode)

ABYC E-11 wire ampacity tables and voltage-drop data as language-neutral JSON, with cross-implementation test fixtures

ABYC E-11 wire gauge, ampacity, and fuse sizing for small-craft DC circuits

Home Assistant component to integrate an AMPS 12v fridge