For the mini2440 I've choosen a TI TMP100 I2C temperatur sensor. This sensor can measure in 0.5 degree steps, and is support by the lm75 kernel driver.
The only problem with the sensor is that the LM75 module does not autodetect the chip, and one has to force detection by echo'ing "tmp100 to new_device in /sys/bus/i2c/devices//new_device
Here is a picture of the sensor board. It will lateron piggyback on the daughterboard.
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