Simple monitor hat with an LCD screen that displays current temperature as sensed by K-type thermocouple through the MAX31855 junction-compensated sensor chip. The board also buzzes at certain preset temperatures.
I’ve shared the project at OSH Park so you can buy a set of three bare boards for $22.55, or $7.51 per board.
The rest of the parts are available at Digikey. If this is your first time building a board, check out our assembly howto and remember to always buy a few extra of the capacitors and resistors. They’re very small, easy to lose, and often cost 30 cents for three but a dollar for 100.
|U1||1||IC CONV THERMOCOUPLE MAX31855 SOIC8||Freescale NXP||MAX31855KASA+|
|C1,C2||2||CAP CER 0.1UF 100V X7R 0603||Murata||GRM188R72A104KA35D|
|J2||1||CONN TERM SCREW GREEN 2.54MM 2POS TH||OnShoreTech||OSTVN02A150|
|R1||1||TRIMMER 10K OHM TH||Bourns||3362U-1-103LF|
|SPK1||1||BUZZER ONE NOTE 3V 4KHZ PIEZO SMT||CUI Inc||CMT-1603-SMT-TR|