Meet the Coin-Sized GPS Cat Tracker – the Katzen Tracker

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https://www.electronics-lab.com/meet-the-coin-sized-gps-cat-tracker-the-katzen-tracker/

Cats are adorable creatures but with a knack for wandering and getting lost every now and then, so much that a common desire among owners is usually to have a reliable way to track them. While a host of adaptable tracking solutions exist, German Engineer, Gerhard Peter felt this is worth a bespoke solution and […]

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 […]

Li-Po/Li-Ion Arduino Charger Shield using BQ21040

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https://www.electronics-lab.com/li-po-li-ion-arduino-charger-shield-using-bq21040/

This Li-Po/Li-ion Arduino charger shield is mainly designed to power up the Arduino from single 3.6V Li-Po battery. Li-Ion and Li-Pol Charger/ DC-DC Boost converter Arduino shield provides 6.5V/400mA from single Lithium Polymer battery. The Arduino shield is equipped with BQ21040 battery charger IC and CS5171 step up DC-DC converter. The shield also has prototype […]