ATtiny13 OLED Thermometer 1023°C

Type K thermocouple thermometer 0-1023 centigrade OLED 0.91 inch display, ATtiny13 or 13A

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Description

This project is about code that fits more functionality into small memory, the project is not an exercise in photography.
Sketch and circuit diagram can be used without any changes on ATtiny25/45/85.
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

Files

oled_tc_13.ino

ino - 6.02 kB - 02/23/2025 at 14:27

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Components

1 × ATtiny13
2 × resistor 470 ohm
1 × MAX6675 module from eBay https://www.ebay.co.uk/sch/i.html?_from=R40&_trksid=p2332490.m570.l1313&_nkw=max6675&_sacat=0
1 × OLED display 0.91", 128x32, SSD1306, I2C

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ATtiny13 OLED Thermometer 1023°C

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ATtiny13 OLED Thermometer 1023°C

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