A 4-channel personal "central heating system," with sensors, for your tropical pet’s home.

Keeping tropical pets is a rewarding and popular hobby. In order that the pets thrive the temperature of the environment must be maintained to within a few degrees and pet stores supply heating pads and thermostatic controllers for this purpose. If more than one habitat is involved then a separate controller/pad system should be used for each, especially if the habitats are located any distance apart or are in different rooms of the house.

This project describes a 4-channel thermostatic controller intended for use with up to four (dry) heat pads. The temperature range is designed to be from about 25°C to 40°C, though each pad may be individually calibrated to the user’s requirements.