Search Results for: audio amplifier

Measuring Temperature using PT100 and Arduino

Engineeering Projects
author prototype of Measuring Temperature using PT100 and Arduino

In this article, you will learn how to Measuring Temperature using PT100 and Arduino. PT100 is a platinum resistance thermometer, which changes its internal resistance according to temperature. In the name PT100, 100 represents ohm i.e. it offers 100-ohm at 00C. Similarly, PT1000 offers 1000-ohms at 00C. PT100 is widely used in industries because of its temperature range. From the nature of the resistance thermometer, we conclude that tolerance depends upon the range we are using it. When we used to measure temperature nearer to 00C (in both positive and…

Fixed Output Voltage Regulator

Engineeering Projects
fixed positive voltage regulator

This basic three-terminal device Fixed Output Voltage Regulator is available as either a positive or negative voltage regulator for a large range of fixed output voltages. In figure 1 small capacitor are shown at the input and output of the voltage regulator, because in many applications such capacitors are required to assure stable operation. Ordinarily we can obtain voltage regulators of the required polarity but it is also possible, as illustrated in figure 2, to use a negative voltage regulator to provide a regulated positive output voltage.Similar connection can be…

What are the Applications of microwaves

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what are the applications of microwaves

The are various applications of microwaves or we can say the application of microwaves can be broadly classified because of their use in various fields including cooking, long ranger communications, etc. The foundation of modern electronics and communications environment using radio frequency (RF) and microwaves were laid in the nineteenth century, named after Michael Faraday’s observations of magnetic field on light propagation in 1845, and James C Maxwell’s derivation of four basic equations of the electromagnetic theory of light. Because of the short physical wavelength of these frequencies, they present…

12V Lead Acid Battery Charger Circuit

Engineeering Projects
12V Lead Acid Battery Charger Circuit

There are lots of 12V Lead Acid Battery Charger Circuit available over the internet but does not include a battery status indicator. If you wish to know the status of the battery like dead, charged, or charging you need an extra circuit. In order to solve these problems, we combined three different circuits and hence do three different dedicated jobs like charging the battery, indicating the status of the battery, and also have a dedicated port for variable power supply connector of bench power supply in case you need. This…

VU Meter Circuit using ATmega32

Engineeering Projects
sound VU meter using ATmega31

A Volume Unit (VU) meter is a standard device that represents the signal level in audio equipment. This project “VU Meter Circuit using ATmega32” makes the representation process much easier since it avoids the use of any physical medium to establish the connection between the audio equipment or audio source and the circuit of the project. This way we can eliminate the hassle of using more components. It uses a bar graph LED for a visual representation of the audio. ATmega32 is an 8-bit AVR (Alf and Vegard’s RISC processor,…

Sound Level Meter Circuit using Arduino

Engineeering Projects
sound meter circuit using arduino

The circuit posted here is of sound level meter using arduino uno board, microphone, Amplifier section and LCD module. The basic function of this project is to measure the intensity of sound and display the result in LCD module. This project can be used in any small closed room like living room, class room etc. The result of sound level is display in LCD module in decibel unit. Here, we had used normal microphone despite of any expensive microphone or sensor. We had already built a sound level meter using…

DIY Li-Fi Speaker | How to Design

Engineeering Projects
lifi speaker prototype

Here in the article I am going to show you “How to design DIY Li-Fi speaker” we are going to show you how to make Li-Fi speaker i.e. uses light to transfer data. This article consist of entire detail like design procedure, circuit diagram, and description. Introduction to Li-Fi (Light Fidelity) The term wireless has been gaining so much popularity in the recent years. Li-Fi is another block to growing platform. The term Li-Fi; Light Fidelity sounds somehow similar to Wi-Fi and they share a lot of common features. Both…

Telemetry System Troubleshooting

Engineeering Projects

Telemetry system have become big business in recent years. In addition to the military applications, many commercial uses are being developed. Today’s telemetry markets range from remote reading of gas and electricity meter to credit card validation, security monitoring, token-free highway toll systems, and remote inventory control. After completing this article, you should be able to: Troubleshooting a radio-telemetry receiver Troubleshooting a radio-telemetry transmitter Receiver Problems Let’s start by looking at some possible receiver problems in figure 1. Since this receiver has a low-frequency IF amplifier, an oscilloscope can be…

Arduino Based Automatic Call Answering Machine

Engineeering Projects
author prototype of automatic call answer machine

The project “Arduino and GSM Based Automatic Answering Machine” is designed to answer the phone call with prerecorded message when we are unable to attain call. Sometime in this busy world we might not be able to attain the phone call due to several reasons (generally when we are in bathroom or watching movie in cinema or forget mobile in home). These calls might be important i.e. call might be from office or business call which cannot be ignored. Thus, the project posted here receive the call after three rings…

Top 10 Arduino Projects 2017

Engineeering Projects
top 10 arduino projects

Here we had complied a list of top 10 Arduino Project 2017 that would be cool, useful and efficient to design in free time. Before talking about the list of 10 awesome project using arduino we would like to clear some point about arduino board. So, what is Arduino? | Top 10 Arduino Projects 2017 Arduino is an open-source design consist a microcontroller and all the necessary circuitry on a signal board. A USB plug is given to communicate between computer and arduino board. The programming is done in Arduino Programming…

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