Circuit Lake

The PSK31 (Phase Shift Keying, 31 Baud) Adapter is a hardware interface between a PC running a digital communications program, such as DigiPan, and an Amateur Radio transceiver. The electronically adjustable PSK31 interface is controlled by microcontroller AVR ATmega8. It provides automated adjustment and optimization of the audio levels that are carried between the [...]

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.

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 [...]

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.