Hi.I want to modify this PR21 circuit into digital multi functional clock.This clock can change it modes just by rotating it (using ADXL 330).It have 4 mode there is clock mode, alarm mode, temperature mode, timer mode or maybe game mode.It can sense temperature of surrounding (using LM35), display date and time using (DS1307 RTC chip).Can u give me some suggestion or guideline for me to complete my hardware design.