Automatic Noise Limiter Circuit

Engineeering Projects
Automatic noise limiter circuit

Man-made sources of external noise are extremely troublesome to highly sensitive communications receivers as well as to any other electronic equipment that is dealing with signals in the microvolt region or less. The interference created by these man-made sources, such as ignition systems, motor communication systems, and switching of high current loads, is a form of electromagnetic interference (EMI). Reception of electromagnetic interference by a receiver creates undesired amplitude modulation, sometimes of such large magnitude as to adversely affect Frequency Modulation reception, to say nothing of the complete havoc created…

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What is Antenna Coupler?

Engineeering Projects
class d citizen band

Once the AM signal is obtained at the final stage, it is necessary to “couple” this signal into the antenna. The circuit which is used to couple the final stage with the antenna is called the antenna coupler. The antenna coupler network for this system is comprised of inductors (L3 and L4), and capacitors (250pF and 150 pF) as shown in Figure 1. This filter configuration is termed a double-pi network. To obtain maximum power transfer to the antenna, it is necessary that the transmitter’s output impedance be properly matched…

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Linear Integrated Circuit Modulator

Engineeering Projects
LIC modulator using programmable dual op-amp

The process of generating high-quality AM signals economically is greatly simplified by the availability of low-cost specialty linear integrated circuits (LIC). This is especially true for low-power systems, where low-level modulation schemes are attractive. Linear Integrated Circuit Modulator using OTA As an example, the RCA CA3080 operational transconductance amplifier (OTA) can be used to provide AM with an absolute minimum of design considerations. The OTA is similar to conventional operational amplifiers inasmuch as they employ the usual differential input terminals, but its output is best described in terms of the…

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Water Flow Detection with Alert System using 555 IC

Engineeering Projects
water flow detection and alert system

Sometimes we have to check the water supply pipeline from the municipal whether water is coming or not. Though the supply interval is fixed, the supply time may vary accordingly. It is quite possible to forget to switch on the motor, which results in no water in the reservoir. The article named, “Water Flow Detection with Alert System using 555 IC” is written to tackle such situations. In this article, you will learn to construct a simple water flow detector circuit. The circuit basically triggers the alarm when the water…

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Interfacing UV sensor with Arduino

Engineeering Projects
uv sensor with arduino

In this article, we will learn to interface a UV sensor with Arduino nano. The term “UV” stands for ultraviolet and UV sensors are used to measure the power or intensity of incident ultraviolet (UV) radiation at a particular area. This form of electromagnetic radiation (UV radiation) has shorter wavelengths than visible radiation but is still longer than x-rays.  Some theory on UV spectrum: The UV spectrum ranges from 100 nm to 400 nm and is divided into three bands. UVA (315-400 nm) – least harmful but stay away from…

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Building my House: Discover the most Common Mistakes Here

Engineeering Projects
discover the common mistake

Conquering their own property is the goal of many people, and, in this process, many value personalization, choosing to create a project from scratch. However, when implementing these plans, it is normal for concerns to arise, such as: “I’m building my house, but I don’t know how to avoid problems”. After all, mistakes during the process can bring harm, making it essential to adopt some precautions so that this achievement is full of joys without the inconvenience and great worries. Want to learn how to do this? In this context, we have prepared a…

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What is the Master Plan and what is it for

Engineeering Projects
master plan

A master plan is a document that aims at urban planning and its development policy. Therefore, it indicates what will be preserved and which buildings are allowed in each region of the city. Despite being little considered, the Master Plan interferes with the lives of the entire population. A simple example is the creation of planned subdivisions. They are implemented in strategic locations and provide all the necessary infrastructure for residents. After all, this is already provided for in the document. However, there are more details to consider. Therefore, in this post, we will explain better…

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How to Interface Nokia 5110 LCD with Arduino

Engineeering Projects
Displaying Text on Nokia 5110 LCD Display with Arduino

In this article, we will learn to interface a compact and monochrome LCD display named Nokia 5110 with Arduino Nano. This article will also demonstrate how we can display alphanumeric characters, draw lines and other shapes and even display bitmap images after converting them into a data array via “Nokia 5110”. Introduction of Nokia 5110 LCD Display: Nokia 5110 is a low-powered, inexpensive, and easy-to-use LCD display module. This display features a low-powered CMOS LCD controller/driver called PCD8544. The PCD8544 is designed to drive a graphic array of 84×48 pixels…

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Interfacing GP2Y1010 Dust Sensor with Arduino

Engineeering Projects
Interfacing GP2Y1010 Dust Sensor with Arduino

In this article, you will see how to interface GP2Y1010AU0F Dust Sensor with Arduino. GP2Y1010AU0F is an optical dust sensor that can detect very fine particles such as smoke, environmental dust, etc. It is designed for application in commercial air purifiers. However, it is also used in air conditioners and portable air quality monitoring systems. This sensor can detect dust particles up to the size of 0.5 µm. Features of Dust Sensor GP2Y1010AU0F Can easily differentiate smoke and house dust Consumes less current: 20mA max Sense dust particles in less…

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Circuit of AM Generation

Engineeering Projects
simple transistor modulator

Amplitude modulation is generated by combining carrier and intelligence frequencies through a nonlinear device. Diodes have nonlinear areas, but they are not often used because, being passive devices, they offer no gain. Transistors offer nonlinear operation (if properly biased) and provide amplification, thus making them ideal for this application. Figure 2 shows an input/output relationship for a typical bipolar junction transistor (BJT). Notice that at both low and high values of current, nonlinear areas exist. Between these two extremes is the linear area that should be used for normal amplification.…

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