To get better UV expose, Andrianakis has built new Switch Timer that will turn of his UV exposure box after some time. The timer uses ATmega8 as main processor and two 7-segments LED as display. There are two buttons for set and start the timer. When time runs out, microcontroller switches relay and also sounds a buzzer. The time is calculated by timer interrupt triggering using a 32.768 KHz RTC Crystal with better accuracy.
The firmware is written in C and you can compile it using WinAVR. Although the project is built for UV exposure box timer, you could use the switch timer for other device like home appliance.