µ[micro]electronics info

Thermometer based on ICL7136 A/D convertor and LCD.

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

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

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

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.

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

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

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.

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.

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