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Digital Thermometer

Digital Thermometer Kit

by Galak Electronics
Part No. VG-402
Shipping Weight: 0.9 ounces (24 grams)

Whether measuring temperatures indoors or out, the Digital Thermometer Kit is the perfect solution. Using a highly accurate processing algorithm, this kit precisely measures the probe value and converts it into either degrees Celsius or Fahrenheit. It can be operated from either DC power or batteries and includes a weather resistant probe.

The unassembled kit includes instructions (including schematic and parts placement) and all the components to build one complete Digital Thermometer. A soldering iron, solder and a pair of cutters are required for assembly. Batteries and holder not included.

Digital Thermometer Kit:



Digital Thermometer Kit
(Built and Tested):




  • User selectable temperature select switch for Celsius or Fahrenheit with corresponding LEDs.
  • Power reduction mode for battery operation (4 AA batteries recommended for extended operation).
  • Wide temperature range from -40C to 125C (-40F to 256F) using external temperature probe.
  • Single button for activating display with soft turn off, reducing current drain to just 4mA.
  • Automatically adjusts display range to read from -9.9 to 99.9 or -40 to -10 and 100 to 256.


  • Supply Voltage: 6VDC to 12VDC @ 25mA (4mA in standby mode)
  • Probe Input Connector: 16-26AWG, screw terminals
  • Temperature Select: Degrees Celsius or Fahrenheit (switch selectable)
  • Temperature Range: -40C to 125C / -40F to 256F (Probe only)
  • Temperature Accuracy: 0.2C from -10C to 45C (14F to 113F) / 0.5C otherwise
  • Board Dimensions: 2.75 x 1.95" (7.00 cm x 4.95 cm)
  • Board Material: 0.062" (1.6 mm) FR-4, with green solder mask and top layer silk screen
  • Finished Weight: 0.9 ounces (24 grams)

Please feel free to contact us if you have any question about this project or any othe Galak Electronics Projects.

Copyright 2013 by Galak Electronics. All rights reserved.