Arduino based yogurt thermometer

Will alert when milk has heated up to 90C (194F).

Will also alert when milk has cooled down to 51C (123F).

Device has been tested with a standard temperature probe found in Polder 362-90 thermometer

Current design on a prototype board:

1. Arduino Pro Mini 5v 16MHz
2. USB Boost Converter 3.7v to 5v DC
3. P-Channel Mosfet IRLML2244TRPBF SOT-23 package solderd to an smd to dip board
4. N-Channel Mosfet IRLML6244TRPBF SOT-23 package solderd to an smd to dip board
5. 18650 battery protection board
6. 18650 battery in a holder (pulled from old laptop battery)