Here’s a quick little project to build a simple temperature monitor. There isn’t much to it really, a temperature sensor connected to the ADC port and an LCD. If you are still learning how to use the arduino this is a good project for you. It illustrates mapping sensor data from the datasheet (see the voltage curve vs temperature) which is something you will see very often and have to build yourself. The source also includes doing custom bitmaps on a character LCD, and utilizing the EEPROM to save data.