Im want to build this circuit.
I am a novice at this.
The diagram states that the alarm will go off when the freezer gets to be 0 C.
Actually I think this is too late. Any freezer that goes kaput will hold th e temp for perhaps 24 hours before it gets to 0c. By that time the food is now pretty much defrosted. And must really be used up.
How can this circuit be changed to say go off at maybe -3 C. or there about s.
Thanks all.
P.S.
I cant seem to get any listed parts locally. I want to buy them from SAYAL electronics because they are near me and I can pick them up. But I cant see m to find any of the parts on their web site. I have tried to do comparison s but they dont seem to have any of those parts either. (and maybe IM doing something wrong) I'M sure they have what I need but I just dont have the s kill to compare parts, if any Canuck (or other kind person could mach parts that would be great)
I dont like buy things across the border or on line.