The past month or so I've been playing with the Maxim DS1307 Real-Time-Clock and DS1621 Temperature Sensor ICs. I hooked them up to an Arduino Uno board with a Parallax Serial 16x2 Character LCD. I got both ICs working in separate sketches that I've blogged about previously, but I wanted one combined program.
Below is the result:
I cleaned up my code/sketch and you can download it here.
The hardware implementation is really simple since both ICs communicate to the Arduino via the 2-wire I2C port; only 5 connections are needed to the Arduino (+5V, GND, SCL [A5], SDA [A4], and TX )