Multi-Purpose System with Radio, Alarm Clock, and Thermometer

Overview

The project illustrates the use of a microcontroller for combined tasks to create a radio-clock-thermometer device.

Explanation

A radio module was initially intended to be used in this device although it did not work. This results to taking a radio chip from computer radio tuner which can be easily controlled through 3 wires consisting of DATA, Clock, and Write Enable, with available mono/stereo selection input. There was an advanced car audio signal processor used to give more control power. A DALLAS DS1820 sensor was implemented for temperature reading. There can be up to 8 temperature sensors connected to one wire but only two were used in this project.

A graphical LCD with built-in ST7565 controller will be used to display the information. The data on LCD is organized in 128 columns and 8 rows of 8 bits as dots. All necessary LCD control commands are stored in the flash memory where images and fonts are stored in further address.

The Assembly language for AVR Studio writes the program for AVR ATmega8515 microcontroller. The buttons correspond to different press counter values and parameters are increased and decreased using left and right buttons.