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.

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LCD thermometer

Thermometer based on ICL7136 A/D convertor and LCD.

DTMF Decoder

Decoding DTMF (Dual Tone Multi frequency) with MT8870 chip and AVR x2313 microcontroller.

I2C EEPROM programmer

This EEPROM programmer reads, writes and erases I²C 24C EEPROM devices through a PC serial port (RS-232) interface.

USocket - USB controlled Socket with PIC18F4550

The idea of this project is to control (switch off/on) two power sockets with a computer by using its USB port.

ATTiny Board

With this small board you can program most of the AVR ATTiny microcontrollers or you can build your projects to use it in a stand alone application. It can be powered with a 9V battery because it has 5V voltage regulator on it.

USB Bit Whacker

An inexpensive, simple input/output device to connect your computer to the real world by Brian Schmalz.

AVR-MIDI - an USB MIDI-class compliant device

This is an inexpensive DIY MIDI controller device for USB. It consists of a simple AVR ATMega16 with driver software from Objective Development (see).

Electronics sthetoscope

This project is an attempt to build a portable electronic stethoscope that selectively
amplifies body sound signals for clear auscultation by applying various digital filters
using Microchip dsPIC capabilities along with Microchip’s low noise op-amps and PGA.

LPC2138 as a VGA controller

An LPC2138 microcontroller generates the VGA signals that drive the monitor as well as the graphics and fonts. The microcontroller also handles a keyboard, a mouse and some storage memory.

Direct connecting: AVR to USB, no HW converters

Some techniques to connect AVR-based device to USB without a specialized HW, just only in the SW way.

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