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DS18B20 Programmable Resolution 1-Wire Digital Thermometer

DS18B20 Programmable Resolution 1-Wire Digital Thermometer

  • Model: SE-DS18B20
  • Shipping Weight: 1g
  • 224 Units in Stock
  • Manufactured by: Maxim
  • DS18B20 Datasheet

$3.90

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Words cannot do justice to these temperature sensors.

They look just like a transistor with a 3 pin TO-92 package. Pin 1 is Ground and pin 3 is Vdd. The "special sauce" comes from pin 2, which uses Maxim's proprietary 1-Wire interface.

Each sensor has a unique serial number and you can daisy-chain several sensors on the single 1-Wire bus. You can query each sensor indvidually and receive the temperature in a 9 bit response.

For even more specialness, you can disconnect Vdd and run them in parasitic mode.

did we mention we like them?