I'm working on a prototype board that will monitor a few sensors. It's just a fun hobby project so I was thinking a clean design might be a switching power supply, micro and maybe three sensors all using the same bus. Just the two i2C lines could out and three sensors could all be side by side. My coding is not the best so i'm looking for parts that have a fair amount of example code to help me get each part working. My components so far are: Temperature: TMP75 Possibly a LM75A or a TMP102 Accelerometer: ADXL345 Real Time Clock: DS1307 sounds like the best one to go with.