Bingo! Thanks for finding the datasheet! The print on mine has a dot of epoxy obscuring 'TM' on the IC label but all the other markings match exactly. Here's a picture of the same sensor for the CD (APPLE, 820-1941-A) https://macparts911.com/media/catalog/product/cache/1/image/512x512/9df78eab33525d...

I have a tray full of old iMac temp sensors liberated during various SSD upgrades. I'm guessing these are using one of the one wire protocols but as I no longer have any working iMacs I can't reverse engineer them. Also, given that they're running about $5 online they seem a good source of cheep amb...

For Google Coder to work, Windows users need to install Apple’s Bonjour print services, which can be found here… http://support.apple.com/kb/DL999 Props where props are due; I found this answer here: http://raspi.tv/2013/google-coder-on-the-raspberry-pi-how-to-install I also found it easier just set...