µ[micro]electronics info

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




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.

My e-mail

My website

Measuring Heart Rate

Did you know that The human heart can be measured optically. The heart beat with the varying blood pressure leads to a measurable change in the visual content of peripheral blood vessels. This is as good at the finger detect. There are two project work available, which were so far advanced that the optical signal pulse seized on a liquid crystal display graphically. Both works have been with a microcontroller PIC16C74 to collect and visualization of the signals.


Demo-application for Philips LPC2000 ARM7TDMI controller with a KS0108/KS0107-based graphics-LCD (128*64 pixels), DCF77 time-receiver and 1wire-Bus.

Simple negative power supply

This stuff is really small, use some common parts and can be reuse across different needs.

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.

IDE controller

An IDE interface for a microcontroller using an 8255 by Peter Faasse

PICASO VGA/SVGA Graphics Controller

Compact & cost effective ready to go 'drop in' embedded graphics engine that will deliver stand-alone functionality to your project from 4D Systems.

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.

Syndicate content

Powered by Drupal - Design by Artinet