looking to keep an eye on the temperature inside his wood-fired pizza oven, [Giovanni Bernardo] decided to avoid the industrial offerings as well as develop his own high-temperature thermometer utilizing a type-K thermocouple. The end result is a no-nonsense handheld system with a surprisingly low part count that, at least in theory, can checked out temperatures as high as 1023.75°C. though we hope he’ll be pulling the pizza out long before that.
Inside the 3D printed situation we discover just a handful of components. The 0.91″ OLED screen mounted in the front panel is wired to a Digispark ATtiny85 advancement board, which in turn is linked to a MAX6675 breakout board. This takes the input from the thermocouple probe as well as converts it into a digital signal that can be checked out over SPI with an Arduino library from Adafruit. rather than going with the added complication of adding a rechargeable pack, [Giovanni] is running this thermometer from a common 9 V battery thanks to the 5 V regulator developed into the Digispark.
We particularly appreciate the interest to detail [Giovanni] put into his situation design. Each element is nestled into a completely developed pocket in the bottom of the box, as well as he’s even gone with the difficulty of utilizing heat-set inserts for the front panel screw holes. It would have been quicker as well as easier to just design up a fundamental box as well as hot glue his elements in place, however he took the long method around as well as we respect that.
This job is one more example of an fascinating principle we’ve observed over the years. put simply, if somebody is going with this much difficulty to inspect an object’s temperature, there’s a higher than typical possibility they mean on eating it at some point.