Presented here is a PC-based GPS receiver that lets you find the location of a place and also gives the standard time on your PC. It may be useful in remote areas where no other wireless network for mobile and the Internet is available.
The circuit presented here can be used as a lock for important electronic and electrical appliances. When a card is inserted inside its mechanism, depending upon the positions of the holes punched on the card, a particular appliance is switched on.
There are many ways to program the AVR microcontrollers, such as in-system programming, parallel programming and using bootloader. Advantage with the bootloader method is that you don’t need any external hardware to load the hex file on the microcontroller. A bootloader program is placed inside the boot section of the Flash memory, to handle communication with the host PC and facilitate programming of both Flash and EEPROM.
Carjacking can be prevented using the anti-carjack system described here. The circuit automatically senses carjacking and stops the vehicle. In case the circuit is accidentally tripped off, it can be easily reset using a hidden switch. Two LEDs indicate the status of the system to the vehicle driver.
Here we describe how to control electrical and electronic gadgets from a remote location using radio frequency (RF) transmission. An RF interface is used instead of infrared (IR) to avoid the drawbacks of an IR interface
Presented here is a handy postfix notation system that can do your calculations in practically no time, and that too without changing the source code. It can even handle parenthesis and algebraic operator precedence.
Android smartphones are undoubtedly the most popular gadgets these days. You will find various apps on the Internet that exploit inbuilt hardware in these mobile phones, such as Bluetooth and Wi-Fi, to control other devices. Presented here is a robot that can be controlled using an app running on an Android phone.
In this event logger article, we also demonstrate the use of a DS1307 real-time clock (RTC) chip, switches and an LCD module. The RTC chip provides time components of hours, minutes and seconds in addition to the year, month and day.
This AVR microcontroller-based global positioning system (GPS) receiver can be used to find the exact location of a place and know its standard time.It provides the data corresponding to its position on international standard latitude-longitude basis and also the standard coordinated universal time (UTC) along with some more information received from the nearest satellite assigned for this purpose.
This soccer robot can move forward, reverse, forward-left, forward-right, reverse-left and reverse-right with the help of an Android phone. The speed of its movement is controlled by the angle of rotation of the phone.
Presented here is a personal weather logger whose various transducers are used to log weather data such as humidity, atmospheric pressure and temperature. The data is transferred to PC where it is displayed as a graph for analysis.
Presented here is a Web-based water-level monitor and motor-pump controller using ATmega128 microcontroller, Ethernet controller ENC28J60 and TCP-IP protocol. The design involves the use of port-forwarding facility of broadband modem or router.
The concept of controlling various servo motors through Arduino Uno board is introduced here with a fun project called 'namaste robot.' The robot turns its head by 180 degree and scans people in its range using an ultrasonic module.
Here is a simple car-parking alarm circuit based on an AVR microcontroller and an ultrasonic module. The circuit will alert you while you are reversing your car for parking, if there is any obstacle, through an audio-visual alarm.
Morse code is a method of transmitting textual information as a series of on-off tones, lights or clicks that can be directly understood by a trained listener without using any special equipment. The International Morse Code encodes alphabets, numerals and a small set of punctuation and procedural signals as standardised sequences of short and long signals called ‘dots’ and ‘dashes,’ respectively.
The regular 16×2 LCD can display characters of only certain dimensions. A graphical LCD (GLCD), on the other hand, can display custom graphics. GLCDs are therefore highly suitable for mobile and industrial applications.