kfrydryk/temp-alarm

Temperature Sensor with timer and Alarm

It's a home project - gift for a girlfriend. The device can measure temperature using DS18B20 sensor on a probe, show real time measurements on LCD display and set off alarm when needed. It uses barebones Atmega328 chip powered by 3 AA batteries. It can work in 4 modes.

Work Modes

Temp	Timer	Result
Not Set	Not Set	Temperature is printed in real time, timer counts from 0 upwards, no alarm is set
Not Set	Set	Temperature is printed in real time, timer counts down to 0, alarm when timer reaches 0
Set	Not Set	Temperature is printed in real time, timer counts from 0 upwards, alarm is set off when set temperature is reached
Set	Set	Temperature is printed in real time, timer shows set value and starts counting down when set temp is reached. Alarm is set off whem timer reaches 0

Schematics

All schematics should be uploaded in Eagle_files folder