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4A/10A, 220V Power Amplifier ICs

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The PA164/PA165 are high density power amplifier ICs that elevate the performance benchmarks and thermal management efficiency for single-chip power amplifiers. These devices are capable of providing 1A/4A of output current continuously, and up to 10A PEAK output for the PA165, while operating on voltage supplies of up to 200V.

These ICs are designed to use separate supplies for the amplifier core and the output stage to help optimize overall power dissipation capabilities of up to 28W of internally generated heat.

IOT Based Weather Monitoring System Using Particle Photon

Contributor: 

Hari Prasaath K
Blynk App UI for Particle Photon based IOT Weather Monitoring SystemWeather Monitoring Systems are used to monitor the continuously changing climatic conditions. The data gathered by such devices is used to forecast weather as well as keep a log of the environmental changes at a place. Such data is extremely useful in the study of earth and analyzing the changing climatic and environmental conditions at a place.
 
Further, the data and analytics so collected can be utilized in a variety of applications like agriculture, geology, mining and weather forecast. In this project, a simple weather monitoring system is designed which can monitor the temperature and humidity of a place.  The weather monitoring system designed in this project is an IOT device built on Particle Photon. Particle Photon is an Arduino compatible IOT board. For writing the program code for any Photon, developer needs to create an account on Particle website and register the Photon board with his user account. 

Designing 250 Milli Watt Audio Power Amplifier - 2/9

Contributor: 

Dikhsa
250 mW Audio Power Amplifier Circuit In the previous tutorial, basics of audio amplifiers were discussed. It has been already mentioned that on the basis of application, there are two types of audio amplifiers - 
1) Pre-Amplifier
2) Power Amplifier
 
The pre-amplifiers are used to level up the audio signals from a microphone or audio source to standard voltage levels while the power amplifiers are generally used at the output stage of the audio systems to boost audio signals before they are reproduced by the speakers. In this tutorial, a power amplifier with 250 Milli-Watt output power will be designed.
 

Designing an Offline UPS - Part (12 /17)

Contributor: 

Dikhsa
Offline UPS Circuit using Modified Sine Wave Inverter and Lead Acid battery ChargerIn the previous tutorial, Online UPS was assembled from its basic building blocks like Lead Acid battery Charger, Square Wave Inverter and Modified Sine Wave Inverter. Now in this tutorial, offline UPS will be designed. The Offline UPS is one of the topologies of UPS (Uninterruptible Power Supply). In UPS system, the term topology refers to the switching mechanism of the UPS system. 
 
Contrary to online UPS, in offline UPS, the load circuit is initially directly powered by the AC mains. On the failure of power supply, the power failure is detected by a switching circuit and the power is provided to the load through the battery and inverter after the power failure has already occurred. So, in the offline UPS, the load experiences the power cutoff once before it receives the power backup from the UPS.

IOT based Solar Panel Monitoring Using Particle Photon

Contributor: 

Hari Prasaath K
Particle Photon based Solar Panel Monitoring IOT Project Circuit ConnectionsSolar energy is the future of energy industry. The countries all around the world are focusing towards renewable and clean sources of energy. The sunlight is the most abundant resource available everywhere and each day. By generating energy using sunlight, the electricity generation can be done without any pollution.
 
The solar plants now have been generating not only energy but also immense opportunities  of employment as well. The solar plants have been now employing more people than the coal industry. So, the use of such resources like the solar energy is useful  from every aspect ranging from environment to economy.

Basics of Audio Amplifier - 1/9

Written By: 

Diksha
Audio is one of the most common media. Here, It refers to the representation of sound which can be perceived by humans. Audio and Video are the essential component of any electronic media. The electronics can be used to receive audio signals (via microphone), record audio in some storage, transmit audio (through wired or wireless communication channels) and reproduce audio signals (via speakers).
 
The audio can be represented and transmitted as either analog signals or digital signals. In this series, analog audio signals are the concern. The audio signals have a frequency range of 20 Hz to 20,000 Hz. 
 

Controlling LED lights from a Web Server using ESP8266 Wi-Fi Module based IOT device

Contributor: 

Hari Prasaath K
ESP8266 based IOT LED Light Control Project Circuit ConnectionsHome automation is the new trend in consumer electronics. Nowadays, people not only want a well furnished house but also want a smart home to live in. The basic concept of home automation is controlling the home appliances with a remote control.
 
The modern day smart homes may have many additional features where the user could interact with the consumer appliances through augmented reality or have various smart features like telephony, contacts management, time keeping utilities, audio and video playback all integrated in smart devices especially designed to be part of the smart home. 

Arduino Based Air Quality Monitoring IOT Project

Contributor: 

Hari Prasaath K

Arduino based IOT device for Real Time Air Pollution MonitoringAir pollution has become a common phenomenon everywhere. Specially in the urban areas, air pollution is a real-life problem. A lot of people get sick only due to air pollution. In the urban areas, the increased number of petrol and diesel vehicles and the presence of industrial areas at the outskirts of the major cities are the main causes of air pollution. The problem is seriously intensified in the metropolitan cities. Also, the climate change is now apparent.

The governments all around the world are taking every measure in their capacity. Many European countries have aimed to replace petrol and diesel vehicles with the electric vehicles by 2030. Even India has aimed to do so by 2025. The use of coal for electricity generation is now going to be a thing of past. The nations are now focusing to generate energy from nuclear reactors and the renewable resources like solar energy, wind energy and hydroelectric power. 

Designing Gate Driver Circuit and Switching Mechanism for Modified Sine Wave Inverter - (Part 9/17)

Contributor: 

Dikhsa
Gate Driver Circuit for Modified Sine Wave InverterIn the previous tutorial, basic operation of a modified sine wave inverter was discussed. It was mentioned in the previous tutorial that the H-bridge MOSFET circuit of the quasi sine wave inverter cannot be directly interfaced with the microcontroller circuit. There is a need of a Gate driver circuit as an intermediate circuit between the microcontroller and the H-bridge MOSFET circuit. The H-bridge MOSFET circuit generates a modified sine wave by switching the MOSFETs in a sequential manner with predetermined delay.
 
This sequential switching of the MOSFETs in the previous tutorial was explained with the help of a truth table and circuit diagrams.

Keypad Controlled RF based Wireless Robot

Contributor: 

Hari Prasaath K
AVR based Keypad Controlled Wireless RobotIn robotics, wireless robots are commonly used for applications that need to be operated remotely. Usually such robots are controlled with a remote control that connects with the robot using a wireless technology like RF, Zigbee, Bluetooth, Wi-Fi or Mobile network. In this tutorial, a wireless robot will be designed that will connect with the remote control using 434 MHz RF module.
 
The remote control will have a keypad to control the movement of the robot. Keypads are one of the commonly used Human Machine Interfaces (HMI) and play an important role in small embedded systems where human interaction or human input is needed.Matrix keypads are well known for their simple architecture and ease of interfacing.