µ[micro]electronics info

A weblog focused on interesting circuits, ideas, schematics and other information about microelectronics and microcontrollers.

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Because I have not tested all electronic circuits mentioned on this pages, I cannot attest to their accuracy; therefore, I do not provide a warranty of any kind and cannot be held responsible in any manner.

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ATMEL AVR

Minesweeper - TV game

"Minesweeper" is originally a PC game that comes along with the Windows bundle. For our design, there are 15 x 10 cells on the game board. At first, all 150 cells are covered, and the player can left-click the PS/2 mouse on a destined cell to uncover it, or right-click to mark the cell with a flag – a reminder to the player that the cell is possibly taken by a mine.

OLED color display with Arduino

How to get started displaying images on 4D OLEDS using Arduino.

Experiments with DSP

This project is an experiment of the Digital Signal Processing with a cheap microcontroller instead of an ordinary digital signal processor. Recent 8 bit microcontrollers have sufficient processing performance so that they can be used for simple audio signal processing.

Motion controlled MP3 player

The MP3 player does not have any buttons nor dials that shown in right photo and it has an acceleration sensor instead of the mechanical switches. Therefore all playback commands to the player are given in defined motions, such as inclination, tilt and shock. The player detects the motion with the built-in acceleration sensor and recognize it as a playback control command. As the result, it came to not seem an audio player in appearance.

AVR-MT development board for 20pin AVR

Development board for 20pin AVR microcontrollers with STKxxx-compatible ICSP (10 pins) PLUS simple handy password generator.

GPS data logger

A GPS data logger that records position data from the GPS module. The position data is received in NMEA-0183 format and store its sequence into any storage device. The position data can be processed with existing GPS utilities for interesting applications.

Flickr images on a Nokia 6110 Color LCD

Most used are these green character displays with two or more rows to display menus, status or debug messages. With mass production of mobile phones, color LCDs get that cheap, that they can be used as replacement. To test the display, I hacked a kind of small digital picture frame, that fetches pictures from Flickr.

USB AVR programmer

In-system programmer for a lot of AVR microcontrollers

Another 40MHz frequency meter

This article shows how to build a small, cheap and simple frequency meter, without any fancy, out of reach components.

WizNet-based security system

Ethernet based Security System by Ahmad Masri

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