The Li-ion 2 Cell Battery Charger Universal AC with wire is a lightweight and compact charging solution for 3.7V Li-ion batteries. Its universal AC input makes it convenient for use in different voltage standards across the world.

In this video tutorial, we will guide you to check Inductor is working or not using Digital Multimeter.

HC-SR04 Ultrasonic sensor is a 4 pin module used in many applications where measuring distance or sensing objects are required. Check out this article to find more details about ultrasonic sensor like pinout, datasheet and technical specifications.

A potential divider circuit is a very common circuit used in electronics where an input voltage has to be converted to another voltage less than it. This circuit is very useful for all analog circuits where variable voltages are required, hence it is important to understand how this circuit works and how to calculate the values of Resistors.