Interface 4×4 Keypad and ATmega32 with Single Pin

proteus simulation output 2

How to interface the 4×4 keypad and atmega32 with a single pin? While working with most of the electronic projects, you might have noticed one thing in common; they involve several multiple connections between the components used and the microcontroller. Well, it does seem a necessity too, since doing some hardware work in a certain way is not a piece of cake. Because of this, we are compelled to remove some components or include an additional microcontroller in the project which makes it bulkier and less convenient. To address this…

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VU Meter Circuit using ATmega32

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,…

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ATmega16 Based Voting Machine

atmega16 based voting machine

Atmega16 based voting machine: Well, the key word; Corruption is everywhere. I believe it is what comes together with politics. Yes, here we present an attempt to sweep a dirt away from this system. The project is concerned with development of an electronic voting machine which is built around an AVR microcontroller, which help us to create a fair election process at least. Electronic voting machines (EVMs) have been a necessity in government elections. On comparison to traditional methods, this machine provides a far more secure voting environment and reliable…

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GPS Module Interface with ATmega16

circuit diagram of gps interface with atmega16

Currently, in the market, a large number of GPS projects are distributed. You might be wondering what is different here? Well, the GPS receiver we are talking about is solely based on AVR- microcontroller. The project collects information from the satellite and so is more practical than other systems that demand wireless network connections as cellphones or Internet to operate. This GPS receiver system is a boon to remote areas and can be used as a base to work in other research areas. It works with the satellite to track…

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Ultrasonic Water Level Meter

ultrasonic water level meter transmitter circuit

Wireless Ultrasonic Water Level Meter using ATmega328 Water level indicator is one of the most popular projects over the internet but the problem with that is, it uses metal electrodes as a result corrosion is occurring. When we pass DC in water it starts to react with the metal in presence of oxygen and corrosion is occurring. This problem is minimized by using alternating current instead of direct current but there is always the risk of electric shock which can be dangerous if is handled by a non-technical person. By…

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DIY Distance Measurement using GPS and ATmega328P

distance measurement using GPS and ATmega328

Whenever we thought about distance measurement, an image of a circuit designed using an ultrasonic sensor is formed in our minds. But today we are going to present here a distance measurement project using the GPS (Global Positioning Measurement) module. The project named DIY Distance Measurement uses GPS and ATmega328 which measure the distance between two positions using the haversine formula. The start point is the position where switch SW1 (Reading Switch) is pressed and the endpoint is the position when switch SW2 is pressed (Switch Switch). Thus, the circuit…

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DIY Digital Compass using ATmega8

circuit diagram of digital compass using atmega8

The DIY project Digital compass posted here utilizes an OLED display to show the direction (i.e. north). Another feature of this project is, it shows real data and time. DIY Digital Compass using ATmega8 A conventional compass utilizes a needle or a dial kept inside a compass rose. The conventional compass work on the principle of the earth’s magnetic field. But the projects DIY Digital Compass using ATmega8 posted here use the sun position to show the direction, unlike the magnetic field. Thus, this DIY Digital Compass is not affected…

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ATmega8 Based Restaurant Menu Ordering System

restaurant menu ordering system transmitter circuit

We often visit to restaurant for food and drink, there we see a waiter came and ask for order. The most annoying part is waiter wait while we are choosing items for menu. At the time of pick hour customer increase, requires more manpower and as a result the situation becomes annoying and expensive too. In order to solve these problem, here we had design a simple automation system called restaurant menu ordering system based on 8-bit microcontroller ATmega8. Different concept of digital menu ordering system has flourished along with…

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Wireless Temperature and Humidity Indicator for Fridge

circuit diagram of receiver unit of wireless temperature and humidity indicator or fridge

There are various types of circuit used to indicate the temperature and humidity of fridge but it cannot measure relative humidity accurately. Because at the time of door opening of fridge relative humidity will rise or fall due to moister of surrounding. Thus, we had posted here “Wireless Temperature and Humidity Indicator for Fridge”. Here, we had posted a simple, small and handy wireless device which is used to measure temperature, humidity and relative humidity from inside the fridge. The circuit posted here used RF technology to transmit and receive…

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GPS Navigator Circuit using ATmega 16

author prototype of GPS navigator

The system “GPS Navigator Circuit using ATmega 16” is implemented to detect the position/location of anything under consideration, and hence it is suited for navigation activities. Introduction to GPS Navigator Circuit using ATmega 16 The term GPS has been so popular in recent times. The credit for its quick recognition is due to the list of multiple features this system offers. Elaborated as a Global positioning system (GPS) it has already been established as a reliable technology that has made our lives much easier. Just with the involvement of GPS, we…

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