This article on DigitalWizard describes how you can easily make a system that shows room temperature in dot matrix 32×16 LED display. The project is based on ATmega8 MCU which is a 28 pin high performance microcontroller from Atmel Corp. Please click here to read more.
EDA tools (Electronic Design Automation) tools are specially designed for electronic systems such as printed circuit boards and integrated circuits.we live in a golden age of free Electronic Design Automation tools. It wasn’t that long ago that an engineering workstation was an expensive piece of hardware running very expensive software that typically had annual fees. Now, you can go to your local electronics store and buy a PC that would shame that old workstation and download plenty of software to design schematics, simulate circuits, program devices, and lay out PCBs. Today, I wanted to briefly introduce a free Web-based EDA tools – EasyEDA. You can use EasyEDA to draw a schematic, populate a PCB, and download manufacturing files (that is, Gerber files). EasyEDA also offers SPICE simulation function. There’s a lot of advantages: EasyEDA is free, and is also based in the cloud, so you can directly create your designs online, there’s no need to install any software. It can be used by all hardware and operating system, whether you are using Linux, Mac or Windows; Chrome, Firefox, IE, Opera, or Safari. The software is always up to date. You can use it just about anywhere and have access to your files. EasyEDA is specially developed to provide electronic engineers, educators, students and hobbyists a cloud-based EDA tool which is […]
P10 LED Display panel are now the easiest method to design all kind of smart LED signage and display system. This article will teach you the basic of P10 LED display panel and how to interface with AVR ATmega8. Read more →
This article on DigitalWizard describes how you can easily make a system that can control your home appliances like lights, fans etc from your smart phone. The project is based on ATmega8 MCU which is a 28 pin high performance microcontroller from Atmel Corp. Communication between this system and the smartphone is over the Bluetooth network. Please click here to read more.
This article on DigitalWizard describes how you can easily make a system that can control your home appliances like lights, fans etc from SMS commands. The project is based on PIC18F4520 MCU which is a 40 pin high performance microcontroller from Microchip Inc. It has a 16×2 LCD module as the main output unit to show various status messages to the user, thus making it extremely user friendly. GSM connectivity is achieved using a SIM300 or SIM900 modems. Please click here to read more.
This article on Digital Wizard explains the basic working of HC-SR04, which is a very low cost and popular sensor module to measure distance to obstacles. The author also explains the development of C code to interface it with a PIC16F877A microcontroller and display the readings on 16×2 LCD module. Please click here to read more …
Control any appliance in your home like lights, fans, AC, pumps etc from anywhere in the world by just dialing a mobile number and then pressing numerical buttons of your mobile phone. Read more →
This project is designed to guide a visually impaired person to walk and avoid bumping into obstacles. Low cost ultrasonic rangefinders along with a microcontroller is used to measure the distance to obstacles and if they are close enough provide a feedback to the user in form of beeps or vibrations. The project is made on a small single layer PCB. The sensors are not mounted on the PCB but they are mounted on front of the stick and connected to the main board using wires. All the parts of project PCB is shown in the image below. Read more … Pages Introduction and Usage Block Diagram Schematic and BOM PCB Layout Details of the Sensor Program and it’s Explanation
Today the market is flooded with so called project guidance institutes who provide ready made projects to the students of engineering. Over hyped and flashy names are the characteristics of such projects. I am writing this for the guidance of both students who are planning to buy such things or the faculty members of the collages evaluating such projects. Below I am giving some simple tests that could help you judge how well the software is developed. Start up the system with GSM Module disconnected from the MCUs Rx and Tx line and check if the system is able to detect this fault. Start up the system without inserting a SIM card, and check if the system is able to tell you the exact problem. Use a SIM card which has NO balance and SMS pack and check if the system is able to tell you weather message sending failed or not. Check if the system is able to detect presence of network before sending message. Faculty members of collage should arrange a mobile blocker, turn it on and then boot the system. If the system is designed to receive the message, try sending more that 32 SMS to the system to make the SIM memory full and then check what happens. A properly designed system should delete the messages […]
This article on Digital Wizard describes everything about interfacing MMA7455 I2C accelerometer with an AVR ATmega8 MCU. A C library compatible with Atmel Studio 6 is also provide with step by step instructions to get it properly installed in your new AS6 project. Each function in the library is also explained in details. Finally we make a demo program to show raw acceleration readings for each axis on a LCD. Read more …
Relays are very interesting and useful electronic component. They are a kind of switch, like those we use everyday in our home and offices to turn on and off electrical devices like bulbs, TVs, fans etc. The function of relay is to control the switching of a relatively heavier load which demands high voltages (like 240 V AC mains) or high current, from a relatively low voltage control signal (like 5v or 12v) Relays, an Introduction Working of Relays Interfacing of Relays with Microcontrollers Pinouts of common relays Relay Interface with AVR ATmega8 Relay Interface with AVR ATmega16
Transformers are at the heart of power supply units for any electronic device that is to be powered from household wall power plugs. They help step down the higher voltages to lower voltages suitable for electronic circuits inside the devices. Read more …