I have implemented the project number 3 : the love-o-meter.
Once the first LED is lit, measured temperature is getting very high (more or less +10 °C for each LED which is lit).
As required in the book, each of the 3 resistors is 220 Ohm.
By switching to a 10 kOhm resistor, project works properly.
By measuring tension (Volt) around the TMP device, when temperature is getting very high, it goes from 5,07 V to 4,77 V : more or less 3 * 10 °C, because of 3 LEDs ? Maybe just coincidence.
Does anyone have an explanation ? Has someone faced the same situation ?