To learn about RGB led and the difference between single-color LEDs, it is important to make a circuit using a microcontroller such as ESP32 or Arduino and RGB led. Then it is important to manage that circuit using a program. There are some simulators available to make the beginner of IOT learn such concepts without even having the IOT devices available. However, to get real results, using the circuit components and making the actual circuit is important. In this article, using two different examples, the way to use the RGB led is given. In example 1, the actual circuit using ... Read More

To start learning IoT, first, it is important to learn how to make circuits using a breadboard and a microcontroller. Then it is important to control that circuit using a program. There are some simulators available to make the beginner of IOT learn both these concepts without even having the IOT devices available. However, to get real results, using the circuit components and making the actual circuit is important. In this article, using two different examples, the way to start IOT programming is given. In example 1, the Wokwi simulator is used and in example 2, the actual circuit using ... Read More

BMP180 sensor is a sensor that can be attached to a microcontroller on a breadboard and can measure the pressure, temperature, and altitude of a place. It can be connected to controllers such as ESP32 or Arduino and can be used by programs to read the values. In this article, using three different examples, the use of the BMP180 Sensor is demonstrated using ESP32. The circuit is made using an ESP32 microcontroller and BMP180 sensor and the programs to measure the temperature or pressure or altitude are written using Arduino software. Example 1 − Measuring the temperature of a place ... Read More

In this article, using two different examples, the use of potentiometers is demonstrated using ESP32. In the first example, the trimmer type of potentiometer is used to vary the voltage between 0 and 3V. In the second example, the slider potentiometer is used on Wokwi Simulator to show the control of a servo motor. Wokwi simulator is software that can be used for running the code and virtually testing the results without buying the components. The actual diagram of the components is often different from those used in Wokwi, so the actual form of the slider potentiometer is given in ... Read More

A simple buzzer can be connected to the ESP32 controller for producing sound. It can also be used to produce melodies. In this article, using two different examples, the C code is used on Arduino to make the buzzer play the melody. In the first example, “Twinkle Twinkle Little Star”, the poem’s notes are played and in the second example, another famous poem “Jingle Bell” is used for playing the note while making two colored LEDs on and off to create a light show with music. Example 1: Playing the poem notes using buzzer and ESP32 The circuit is made ... Read More

There are two different technologies namely, CVT (Constant Voltage Transformer) and UPS (Uninterrupted Power Supply) that are used for providing power conditioning and protection. A CVT is an electrical device used to provide a constant output voltage despite variations in the input voltage or load, whereas a UPS is an electronic device used to provide power during power outages and voltage fluctuations. Read this article to learn more about CVT and UPS and how they are different from each other. What is a CVT? A CVT is an electrical device that is used to provide a constant and stable ... Read More

An electric motor is an energy conversion device that converts electrical energy into mechanical energy. Therefore, the input to an electric motor is electricity, while the output of the electric motor is mechanical energy in the form of rotation of the shaft. Based on the type of electrical energy that motor requires to operate, the electric motors are classified into two types, i.e. AC Motor and DC Motor. An AC Motor or alternating current motor is one that transforms electrical energy in the form of alternating current into rotational mechanical energy. On the other hand, an electric motor which transforms ... Read More

Volt-Ampere and Watts are power measurement units. Volt-ampere is used to measure the total power that is being consumed by a device. Watts is used to power the device so it can perform its useful work. The product of voltage and current in an AC (alternating current) circuit is known as a unit of apparent power, or VA. It shows the overall power used by a device, which includes both the useful power used and the power lost as a result of inefficiencies like reactive power. The real power used by a gadget to carry out productive work is measured ... Read More

Air coolers and air conditioners are popular electronic appliances that help cool down a room’s temperature. But these two appliances operate in completely different ways and provide different set of features. A cooler is also known as an evaporative or air cooler, which generally works by pulling in the hot air from the room and passing it over the wet pads, where it causes the water to evaporate and cools the air. The air that has been cooled is now circulated back into the room by lowering the room temperature. Coolers are more energy efficient comparing it to the air ... Read More

An amplifier is an electronic device that is used to amplify an electrical signal without changing its other properties. It is used to amplify audio signals so that they can be played through loud speakers. It can be integrated into other appliance like a receiver or a home theatre system. A receiver is a multi-functional electronic device that combines the functions of an amplifier and a tuner. It is the home theatre system's central control unit, responsible for receiving and processing audio and video signals from various sources such as cables, satellite boxes, and Blu-ray. These signals are received by ... Read More