Library for Arduino and ATmega series processors to read the processor's Vcc voltage and percentage of capacity (for battery based projects) using *absolutely* no external components or connections!

ESP32-S3 e-ink weather station

Ultralightweight battery-powered thermometer using ESP32 and MQTT with home assistant integration.

Repository of the S NODE 1 IoT project, a solar powered environmental sensor. The repository contains firmware, software and HW files of the project.

Pointless Button Hardware Version 2

Energy-aware power management and battery-life estimation library for Arduino IoT projects.Arduino ESP32 AVR SAMD IoT battery-life power management BLE GPS LoRa energy harvesting

Battery-powered ESP32-S3 gateway for 4 SDI-12 soil sensors. Deep sleep (1h cycles, ~10μA), MOSFET power switching, individual level-shifted data lines. Precision agriculture and environmental monitoring.

Ultra-Low Power Single push button ON/OFF controller based on ATTiny13/13A/25/45/85 for other microController and circuits application

Ultra-low-power multi-color e-paper photo frame on a 2.5 KB-SRAM ATmega32U4. ~4 months autonomy on a recycled Nokia battery.

Battery-powered bicycle acquisition module using camera, dual 360° Lidar, and GNSS with ROS2 on Raspberry Pi to detect overtaking vehicles and measure curb distance.

A wireless, battery-powered recording light or "do not disturb" light. The light is controlled with two buttons on a webpage. To save power, the MCU enters deep-sleep after 11 hours, for 13 hours.

Battery-powered e-ink dashboard for Home Assistant — weather, calendar, sensors — built with ESPHome on LOLIN S3 Pro + Waveshare 7.5" e-Paper

DIY portable 2-in-1 soldering iron and power supply station with custom circuit design and 3D-printed enclosure.

DitroniX GTIE ESP8266 ADC GTIL CH340 OPTO CT Current Clamp Battery Powered Energy Monitor GTIL2

A compact BLE smart tracker that helps quickly locate misplaced vehicle keys.

A lightning detector that runs on a battery and fits in your pocket. It records the distance, energy and current time of a lightning strike, and you can then view this data via Bluetooth in mobile app. The time is synchronized via Bluetooth.

Project made to learn electronics and ESP32 programming. A self-contained device with OLED display and all parts in an enclosure. The screen shows temperature, humidity and pressure from Home Assistant via MQTT. DS18B20 measures internal temp; a fan is driven by ESP32 with N-MOSFET and hysteresis to prevent overheating.

Firmware for a battery powered Feather M0 LoRaWAN particular matter sensor (BME280, SDS011)

Portable Workbench Power Supply with Adjustable Output (1.25V–10V), USB Output, and Battery Backup for DIY Electronics Testing

Universal Arduino based data logger to SDcard.