Circuit Lake

This multi purpose project is built around MCU AVR AT90S2313. Besides as Frequency meter, the project can be used as Pulse Generator too (combined counter and frequency meter). It doesn’t have any front panel controls because the user interacts via an RS-232 terminal program at 9600 baud. The user controls reads data via an ASCII terminal set to 9600 baud, 1 stop bit, no parity. It use a terminal emulation program named “Term.exe”. The input and output are via the same terminal.

Read more RS232 Frequency Meter and Pulse Generator

In many applications loss of battery power is a problem causing no real harm. But, this is not the case in radio control (R/C) model aircraft. If the aircraft batteries “go dead” in flight it generally results in total destruction of the model and can represent a safety hazard.

Read more Model Aircraft Electrical System Tester

This portable 2.4 GHz Spectrum Analyzer is built inside a cell phone case, Nokia 3410, and used the phone’s graphical LCD to display measuring results. It uses AVR ATMega8 as main controller and CYWM6935 module. The software is written in C using arv-gcc under Windows (WinAVR). The program runs continuously and make around six or seven scans (from 2400 up to 2495 MHz) per second, displaying data in almost real time. There are three display modes implemented: fast, slow, and exposure.

The Spectrum Analyzer project can be used to distinguish between different devices: WI-FI signals, Wireless FM cameras (and ATV signals), Bluetooth devices, Microwave ovens and other device like wireless keyboards. But you need a time to learn the pattern. Miguel A. Vallejo, the designer, said that the most used frequency is always the segment 2450 – 2470 MHz, wifi channel 11. I suppose this is the common default channel in many wireless routers and access points.

The purpose of mains monitor project is to record mains fluctuations with an autonomous device and upload measurement to a PC for analysis. The monitor plugs into an ordinary mains outlet and records (time stamps) the voltage amplitude and the frequency at defined time interval. It transmits data through an USB interface. It can be run in an autonomous way, storing measurements into a flash device, or be connected to PC for real time display of mains parameters.

Read more Mains Voltage Monitor

This project shows you how to implementing your own Web/WAP enabled home automation system. It will allows you to control the on/off state of up to eight 3A appliances via either a web browser or a mobile phone.

Read more Home Automation Using Mobile Phone

This AVR-based magnetic stripe card reader will read the data from track 1 of a credit card, or any other card that uses a similar format, and will send it out an RS232 port where it can be displayed on a PC using any communications program.

Read more Magnetic Stripe Card Reader

This vehicle security system built using Atmel’s Atmega8 AVR microcontroller, Analog Device’s low cost acceleration sensor ADXL311JE and Dallas semiconductor’s DS1973 iButton. The circuit powered by small battery power supply which is integrated with the unit.

Read more Low-Cost Vehicle Security System