Lithium Coin Cell Charger for Rechargeable Coin Batteries

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https://www.electronics-lab.com/lithium-coin-cell-charger-rechargeable-cr2016-cr2025-cr2032-coin-batteries/

This versatile charger has been designed to charge Lithium Coin Cell Rechargeable CR2016/CR2025/CR2032 Coin Batteries. Just insert the battery to the holder, and plug in to any USB port to recharge, D3 Power LED, D1 LED indicates the charge cycle. The board has been designed to use dual chips, either BQ21040 IC from Texas instruments […]

Chronio – Low power Arduino based (smart)watch

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https://www.electronics-lab.com/chronio-low-power-arduino-based-smartwatch/

Max.K @ hackaday.io designed his own impressive watch based on Atmega328p with Arduino bootloader, Maxim DS3231 (<2min per year deviation),  96×96 pixel Sharp Memory LCD (LS013B4DN04) and it’s powered by a CR2025 160mAh coin cell battery. Chronio is an Arduino-based 3D-printed Watch. By not including fancy Wifi and BLE connectivity, it gets several months of […]