Li-ion Battery Charging Guide, LM324

Pinomelean shows you how to build good Li-ion Battery Charger. He helps you understanding the theory of Li-ion Battery and design its charger circuit using Transistor TIP122 and Op-amp LM324.

Design Li-Ion Battery Charger

Lithium based batteries are a versatile way of storing energy; they have one of the highest energy density and specific energy

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Simple Arduino Bluetooth-Controlled Relay Switch

Here is simple Bluetooth controller for your home appliance, Blu-Board. The project is built based on bareduino (ATMEGA328), 2 channel relay, and Bluetooth module. It can be used to turn ON-OFF your home appliance such as thermostat, lights and others.

Bluetooth Controller for Home Appliance

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SquareWear 2.0: Wearable Arduino

SquareWear 2.0 is an open-source, wearable Arduino microcontroller board. It uses Arduino (ATmega328) running at 3.3V and 12MHz as main processor. It has built-in mini-USB port for uploading programs, charging lithium batteries, and creating a serial communication channel. It comes with a lot of useful built-in components, such as a color LED, a general-purpose push-button, a buzzer, light sensor, temperature sensor, three MOSFETs (to drive high-current load).

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