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Temp Sensor

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$8.73

The Temp Sensor is capable of turning the Arduino into an instant thermometer, plugging directly into Arduino Duemilanove Analog Pins 2-5.

The TMP421 chip is a 12 bit I2C chip that works from minus – 40 to 125 degrees C, so the sensor is able to resolve .04 degrees C per bit. The absolute accuracy is guaranteed to be +/- 1 degree C. The relative resolution should make the sensor useful for a range of higher resolution activities such as sniffing out drafts around windows.

The Temp Sensor comes with a 4-pin male header (unsoldered) and 8 total pin-outs to allow for maximal flexibility in project use. With a small, narrow form factor, it’s easy to set up multiple Temp Sensors for local temperature monitoring as well.

A ready-to-go Arduino library is also available free for download at the Liquidware App Store for full, off-the-shelf integration with any Arduino project.

The chip communicates via I2C and also has an onboard remote temperature sensing capability as well.

Specifications

  • TMP421 chip
  • 4-pin male header included (unsoldered)
  • Communicates over I2C protocol
  • 1 Bi-directional data pin
  • 1 Clock pin
  • Ranges from – 40C to +125C with +/ – 1C accuracy
  • Optional remote temperature probe input
  • I2C Digital Interface
  • Arduino Pin Compatible
  • +5V Tolerant I/O

Arduino Pin Mapping

Analog 2 = Ground Analog 3 = Vin Analog 4 = Data Analog 5 = Clock

Resources

Media


Downloads

Downloads
Temp Sensor Cheatsheet Temp Sensor Cheatsheet (209.002 KBytes, Document file, Apr 10, 2010)

Code and pin connections to get the temp sensor up and running in 5 minutes or less.

Get in touch if you have any questions, or ideas for something you want me to build.