AVR based Temperature Controller
It’s based on an AT90S2313 and a Dallas DS1621 Digital Thermometer. The temperature is displayed on a dual 7-segment display, and two buttons are used for setting parameters. A high current relay switches the heating element. The Dallas DS1621 chip interfaces to the 2313 using a I2C interface. This is a 2 wire bidirectional bus with a speed up to 400 kbps.Up to 8 DS1621 devices can be connected on the same I2C bus
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