Using graphic LCD in a project gives it really a good look and flexibility of displaying different characters and shapes. But, the graphic LCDs are quite costly. The NOKIA 3310 LCD provides a really low-cost solution to add a small graphic display into your project and also good for learning purpose. The LCD is SPI bus compatible, saving many pins for other uses.
NOKIA 3310 LCD interfacing with ATmega8 Read More »
Here is a project for beginners to interface a 16-key (4×4) keypad with ATmega32 using 8-pins i.e. one port of the microcontroller. This is useful particularly where we need more keys but don’t want to spend more uC pins for interfacing. The 4×4 keypad is a standard one available in the market. I’ve used here one from my earlier project. The LED shown
4×4 Matrix Key-board Interfacing with ATmega32 Read More »
Due to university and work it has been a while since the last post. But I just completed a little project that’s worth posting. Several old 27C256 EPROMS were lying around unused. So I thought about a purpose for them. As I also had some 8×8 LED matrices, a little animated display came to mind. With each frame
EPROM Display using ULN2308A microcontroller using Atmega Read More »
I am presenting one application with the Nokia 3310 LCD: Designing a thermometer using DS1621 temperature sensor IC. DS1621 is 8-pin sensor from Maxim, with temp range of -55 to +125 degree C, which can be interfaced with microcontroller over two-wire serial i2c bus. It has operating voltage range from 2.7 to 5.5v. I’m operating it here at 3.3v, same as the one
Thermometer using DS1621 and Nokia 3310 LCD interfaced with ATmega8 Read More »
I recently obtained a very old mobile phone from a friend. The battery was dead, so I dismantled it and to my surprise found a display with soldered contacts. In other mobile phones the display was connected via a conducting polymerpad, which was extremly difficult to use on selfmade circuitboards. Googling the name of the display brought up
LPH7319 controlled via I2C using atmega Read More »
Here is my project on interfacing of SD Card (microSD). microSD cards are available very cheap nowadays, a great option for having a huge memory in any embedded system project. It is compatible with SPI bus, so the interfacing is easy. SD card adapters are also easily available in market, one can easily make a bread-board adapter by soldering
SD/SDHC Card Interfacing with ATmega8 /32 (FAT32 implementation) Read More »
Here is my home-made kit of ATmega32 microcontroller interfacing. The ATmega32 controller is rich with features like onboard 32kB in-System programmable flash, 1 KB EEPROM, 2KB SRAM, 10bit ADC (8 channel), SPI bus inteface, TWI (compatible with I2C bus) interface, an USART, analog comparator, etc. That’s why I’ve selected it to load my kit with all those features. This M32 card is having an LCD inteface with contrast
Make-Yourself ATmega32 Starter’s Kit with LCD, I2C, SPI, RTC, ADC interfaces Read More »
This is a business card that will type out some text when you plug it into a USB port. It uses a ATtiny85 microcontroller with V-USB based code to emulate a keyboard. The typing is triggered by the CAPS LOCK status LEDs being toggled 3 times. This instructable will focus on using CadSoft EAGLE to create your
USB PCB Business Card Using ATtiny85 Microcontroller Read More »
Description This board is a small controller board on which you can build your projects. It is suited for educational use, experiments or prototyping. The board uses the AT2313 microcontroller with a 10Mhz crystal. The board contains the ISP 10-pin connector for in circuit serial programming. It has also a push button reset switch for resetting the microcontroller.
ATTiny2313 Board RS232 Read More »
Description This is a peripheral board with 4 relais, rated at 5A/250V each. The board has a ML10 output connector for connection with the AT2313 Project board. It has also 4 LED’s for indication which relais is switched on. Hardware The circuit is simple, it consists of no more then an ML10 connector, a ULN2803A, which contains eight
Relais Board Using AT2313 Using Atmega Read More »
