OLED Thermometer 1023 °C ATtiny13

Type K thermocouple thermometer 0-1023 centigrade OLED 0.91" display, ATtiny13/13A

Sketch and circuit diagram can be used without any changes on ATtiny25/45/85

ATtiny13 or ATtiny13A

OLED display 0.91", 128x32, SSD1306, I2C

2x resistor 470R

MAX6675 module from eBay https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2332490.m570.l1313&_nkw=max6675&_sacat=0

OLED display, 128x64 0.96" or 128x32 0.91", SSD1306, I2C with ATtiny13/13A or ATtiny25/45/85 and MAX6675 K type thermocouple module. MAX6675 is driven by software (bit banging) SPI. The MAX6675 SPI sends 2 bytes of data. OLED is driven by software I2C.

Temperature range is 0-1023.75 centigrade with resolution of 0.25 degree.

Code includes instructions for using OLED 128x64.

ATtiny13 can be programmed using Arduino IDE and Arduino as ISP. Use these instructions https://www.electronics-lab.com/project/how-to-program-attiny13attiny13a-using-arduino-ide/ with the setting : 9.6MHz, no millis no tone, LTO enabled.

ATtiny25/45/85 can be programmed using Arduino IDE and Arduino as ISP. Use these instructions https://gist.github.com/ij96/804e731bd31dbb95b2b043e93c79ceab with the difference of burning bootloader with setting "Clock Source 8MHz internal", "LTO enabled".

Diagram