I believe the LM311 is open collector output and you should have a pull up resistor at the output to V+. Check out this link and note the use of Rl in the comparator circuits.
hmm okay i switch the connections without the pull up, its on all the time without heating the thermisor is it because without the resistor pull?
i dun have any resistor rite now
hmm okay i switch the connections without the pull up, its on all the time without heating the thermisor is it because without the resistor pull?
i dun have any resistor rite now
hi,
Good news.
You should contact the author of the original drawing from where you copied the circuit diagram and tell him about the missing resistor.
It could prevent others from repeating your work..............