Circuit Lake

This project is an experiment of the Digital Signal Processing based on microcontroller AVR AtTiny 26 instead of an ordinary digital signal processor. The project used as simple audio signal processing. There are some simple audio processing, such as Delay, Echo, Pitch Conversion, that easy to experiment with the project. Read more AVR Digital Signal Processing

This EKG monitoring instrument uses the microcontroller AVR AtMega103 microcontroller to control and store the data acquired via EKG monitoring systems involved. The aim of this project is to accurately measure the electrical activity of heart with EKG monitoring instrument. This is achieved by building an instrumentation amplifier which is specifically designed for bio-electrical signal measurement. Read more AVR based EKG Monitoring

This project shows you how to build home built laser projector. The project consist of laser module (the most important component), Galvanometer Scanners, Servo Amplifiers, and Controller. The controller based on ATmega64. Its work only generates vector data with stored frame. Read more AVR Laser Projector

This credit card transaction system with RSA encryption project powered by microcontroller AVR AT90S4414. It takes credit card input from the terminal and sends it to the server controller, which buffers it, and outputs it to the server PC monitor when necessary or requested. The hardware project consists of two Atmel AT90S4414 controllers (client and server), 4×4 Keypad and Hitachi LCD. Read more Secure RSA Credit Card Transaction System

This high power led mood light based on PIC16F628. By varying pulse width from MCU you can produce millions of color combinations using one 3 watt RGB power led. You can choose fading or jumping mode between colors.

The project features a rainbow style or a random color changing behavior. You can set a slow or fast changing of colors and pause on a desired color. It’s really an interesting LED project for your room lamp. Read more High Power LED Mood Lamp

This project shows you how to build wireless temperature sensor with arduino and XBee. It uses LM 34 as temperature sensor. The project configured the radio at the sensor end to read the analog input of pin 19 every 4 seconds and to send a sensor reading packet. Both the sender and receiver radios should be running the API firmware. Input pin 19 on my sensor radio is configured (parameter D1) with value ‘2′ which means that it will read analog input, and the IO sampling rate (parameter IR) is set to ‘1000′ which sends a sample every 4096ms. Read more Arduino Wireless Temperature Sensor

The aim of this project was to add remote-control convenience to the hi-fi preamp without compromising sound quality. It replacing the existing volume control with high-quality optical rotary encoder controlled by PIC 16F877. The project has 7 input sources and 5.1 surround sound. Read more PIC Controlled Hi-Fi Preamp