The divisor is 1024.
It's helpful if you don't call a variable V when it doesn't represent a voltage.
You're doing this backwards. Instead of converting ADC counts to voltages, you should be converting the voltages to ADC counts based on your chosen reference (1.1V). In other words, use formula (b) but solve for VHT instead of VDT.
First of all, thanks for availing the opportunity to pick up the fragrances of pleasure by doing the remaining 2-point checks which were, in fact, my job.
I have made a test run of the measurement process using the equation T = 0.9765*ADCT - 260.4545 and the Serial Monitor; the read out is about 79.170C. The room temperature is about 270C. When I put my fingers over the chip, the temperature seems to be changing!
if (pin >= 14) pin -= 14; // allow for channel or pin numbers ...ADMUX = (analog_reference << 6) | (pin & 0x07);
Once the projects are done by the students, I will post the photos in this thread, if allowed.
Any suggestion in respect of alternative ways/methods/algorithms for realizing the project would be highly appreciated!