Archive for the 'Projects' Category

Stylish wind-powered wifi AP repeater

Friday, May 9th, 2008

The fuel matter has turned into a global alert, where all of the countries around the world need to face the insane fuel price each day, either they like it or not.

Many energy reproductive scientists try to find and exploits any kind of alternative energy that will be the best replacement for the fossil fuel. [...]

DIY unique PCB Drill

Monday, May 5th, 2008

This PCB drill is made of wood and looks really cool. Wouldn’t mind to have one on my table. Design is very unique - it uses various custom made parts, motors from old printers and VCR’s. Author even simulated all design code on a Labcenter’s Proteus VSM.

Bizzare Intermittent Wind Powered Generator

Wednesday, April 30th, 2008

As the global fuel price keeps rising like a rocket, it is always a pleasure to find some alternative power supply.
The wind energy can be considered as one of the clean, eco-friendly and free energy. The main problem is natural wind did not always blow at the same speed and this will gradually affected [...]

AVR DDS signal generator V2.0

Monday, March 10th, 2008

Finally second and improved AVR DDS signal generator is here. First AVR DDS V1.0 generator was only an attempt of running DDS algorithm without any amplitude control. This time I still wanted to keep things simple like minimum count of widely accessible components circuit, single sided PCB that comes together with good functionality.

AVR DDS [...]

Radio, alarm clock and thermometer - all in one system

Monday, December 3rd, 2007

Original project by: Владислав Шаповалов
Such multi-purpose device is a nice example of of using microcontroller for combined tasks. The idea of radio-clock-thermometer came up when authors car audio head-end was stolen. He decided to use what’s left left from car radio and build something nice. So the project has started.

DIY AVR Graphical LCD test board

Tuesday, October 30th, 2007

Once I’ve got several HQM1286404 graphical LCD displays around so I decided to build a prototyping board where I could easily plug LCD to it, read data via ADC and display graphs, plug keypad if needed for some menu functions. Earlier I was testing graphical LCD on prototype breadboard, but dealing with multiple wires (GLCD [...]

AVR based TDA7313 Audio processor control

Thursday, August 9th, 2007

Introduction
TDA7313 audio processor have been used for more than ten years in the industry because of its simplicity, functionality and good parameters like low distortion, low noise. Chip is based on BIPOLAR/CMOS technology and can be used in various applications including car radios, Hi-FI, simple mixers.
TDA7313 chip has 3 external stereo inputs, that allows to [...]

DIY 4×22W car audio amplifier based on TDA7384

Tuesday, April 24th, 2007

So this time I decided to make pretty simple but powerful enough audio amplifier. For this I’ve chosen quad bridge car audio amplifier TDA7384 which has four input and four output channels with power capability 4×35W(4Ω).

 
If connect to car battery where operating voltage is about 13.2V, then each channel can give 22W(4Ω) – what is [...]

Building and installing USBASP-USB programmer of AVR microcontrollers

Monday, February 26th, 2007

USBASP is well known USB programmer for Atmel AVR microcontrollers originally supported by Thomas Fischl. USB ASP is made of an Atmega8 and few components. The programmer uses a firmware driver that makes this programmer attractive to many amateurs.
Another thin why this programmer is so popular – because it is officially included and supported [...]

AVRJTAG clone in action

Tuesday, January 9th, 2007

Building AVR Jtag clone
Finally I found some time to finish AVRJTAG clone. It was hanging for a while on a breadboard with bunch of wires. I have made an Eagle CAD project with PCB layout you will find at the bottom of article.

 
I didn’t change the circuit very much from previous, just added ISP header(but [...]