This project describes how to use all the 8 ADC channels of an Atmega48 microcontroller to read temperature sensors and the measured data to a PC for logging by using the built-in USART capabilities of the chip. For demonstration, the temperature sensor used is LM335 that gives an output voltage proportional to the Kelvin temperature. […]
Multi-channel temperature logger using Atmega48 microcontroller Read More »
This is an interesting voltmeter project that display the measured voltage on a TV screen, in giant digits as well as with analog bar. It also records the maximum and minimum values of measurements. The project was built by Alberto Ricci Bitti and was published in the May 1999 issue of Elektor Electonics. The circuit
Turn your TV into a Digital Voltmeter using Atmel’s AVR 90S1200 microcontroller Read More »
This is a multifunction bench test instrument built using an Atmega128 microcontroller and incorporate a lot of functions like voltmeter, ammeter, logic analyzer, frequency generator, frequency counter and also provides regulated DC power supply. This device is interfaced with a Windows PC to display the measurements. The PC software is developed in VB 6. The function
A multifunction digital meter using Atmega128 microcontroller Read More »
This is a digital clock project based on an ATtiny26 microcontroller, displaying time on four seven segment LEDs. The seven segment LEDs glow bright white and are multiplexed through PORTB pins, whereas the segments are driven by PORTA pins. The time is normally shown in hh.mm format but it can be switched to display mm.ss
AVR digital clock with white seven segment LED display using ATtiny26 microcontroller Read More »
There are plenty of wireless devices available on the market that broadcast in the 2.4 GHz ISM band. Such devices include Bluetooth, WiFi, Zigbee, wireless USB, cordless phones, wireless mice and keyboards, etc. This project describes a wireless spectrum analyzer to examine the surrounding radio frequencies in 2.4 GHz band. The project is based on
Portable 2.4 GHz Spectrum Analyzer using Atmega8 microcontroller Read More »
This project describes how to make a digital oscilloscope using an Atmega32 microcontroller and a graphics LCD. The GLCD used has 64*128 pixel dots (GDM12864A with KS0108 processor) and the AVR runs at 16 MHz using an external crystal oscillator. To enhance the speed further, it uses an external A/D converter chip, ADC0820. The sampling
Digital oscilloscope GLCD using Atmega32 microcontroller Read More »
When you think about building a radio transmitter circuit, the first thing that comes in mind is it requires too many analog components. But wait a minute, this guy demonstrates an AM transmission using a microcontroller. The interesting part is it uses a plant as an antenna for transmission. This project is based on Atmega324
AM radio transmission using AVR using Atmega324 microcontroller Read More »
Have you ever seen a business card with a computer chip embedded on it? This one does. It has an ATtiny85 microcontroller chip that stores all your personal details. You plug it into an USB port of your computer, and find the details about the person opened into a text editor. The firmware uses V-USB
USB business card with a computer chip board using ATtiny85 microcontroller Read More »
This is an experimental board for ATTiny2313 microcontroller that provides a 10-pin connector for in-circuit serial programming, and other header pins to access I/O pins. The AT2313 microcontroller runs on an external 10Mhz crystal. The board has a push button reset switch for resetting the microcontroller. The onboard regulator provides a +5V DC to the
Experimental board using ATTiny2313 microcontroller Read More »
This project describes how to measure temperature with Atmega8 and a thermistor and display it on a Nokia 3310 LCD. A thermistor is a device that changes its resistance with temperature. With a proper resistor divider network, the temperature can be measured by measuring the voltage across the thermistor. The voltage across the thermistor is
AVR displays body temperature on a Nokia 3310 LCD using Atmega8 microcontroller Read More »
