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Mint tin temperature sensor using Arduino!

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Adafruit customer Andrew shared his great project on show and tell last week and wrote in to tell us more. Thanks Andrew!

The project itself is simple. I used:

  • 3.3v Arduino Pro Mini
  • 3v Melexis IR temperature sensor
  • 128×32 SPI Monochrome OLED
  • Slide switch and momentary button Protoboard
  • 150mAh lipo and charger
  • Female to female jumpers and jst cables
  • Male and female headers (a few right angle male headers as well)
  • And the altoids gum tin

The program is stimple too. It has a loop (if statement) that tells it to display “Press button for °F” when idle, and once the button is pressed and the pin is pulled to ground it reads the sensor and writes those values to the OLED.

The device is suprisingly useful and it was fun to make. I used headers and jumpers in a few places to allow me to easily disassemble the entire project and work on individual parts. I learned the value of a modular system the hard way.

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Featured Adafruit Products!

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Altoids Gum sized tin: Ever since Altoids discontinued the Gum version, its been hard to get tins. So we went and got a whole mess of them custom made! These tins are exactly the same shape and size as the old Altoids gum tins but they are blank and we got the bottom flattened instead of rounded (so it fits things better) Read more.


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Monochrome 128×32 SPI OLED graphic display: These displays are small, only about 1″ diagonal, but very readable due to the high contrast of an OLED display. This display is made of 128×32 individual white OLED pixels, each one is turned on or off by the controller chip. Because the display makes its own light, no backlight is required. This reduces the power required to run the OLED and is why the display has such high contrast; we really like this miniature display for its crispness! Read more.


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