Fridge Sensor

A simple project I worked on for a weekend, this device measures the temperature inside my refridgerator. It also can determine whether the door is open or not using a simple CDS cell connected as a resistor divider. It interfaces to the computer using a RS485 multidrop interface. A RS232-485 half duplex transceiver provides the final interconnect.

PICS

Real time graph of the last hour of my fridge's temperature.

The sensor setting in my fridge.

Home -> Portfolio -> Fridge Sensor