Digital Thermometer
Review: 5 - "A masterpiece of literature" by , written on May 4, 20020
Great

Digital Thermometer

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  • Product SKU: LGKT005
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  • Product Code: LGKT005
  • Technical Support: upto 30mins Video support
  • Handmade
  • Make in India
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Details
  • Unsoldered PCB and all components to be soldered on PCB.
  • Includes all ICs, Connecting wires and 9v battery cap.
  • Documentation: PCB Specifications Component list and Circuit diagram.
  • Power Supply: No battery included, Includes 12 Volt DC adapter with the kit.
  • Video tutorial is available on YouTube.
  • One set of the readymade in working condition.
  • Includes all ICs, Connecting wires and sensors.
  • Documentation: PCB Specifications Component list and Circuit diagram.
  • Power Supply: No battery included, Includes 12 Volt DC adapter with the kit.
  • Video tutorial is available on YouTube.

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Specification

Description

The Digital Thermometer is a device that uses a variety of different principles to measure temperature or temperature gradient. Thermometers have two important elements: a temperature sensor, where a certain physical change occurs with temperature, as well as some methods of converting this physical change into numerical values like the scale of a mercury thermometer.

In this Digital Thermometer DIY kit, one can measure temperatures up to 150C with an accuracy of +_1C. We are using operational amplifier Op-amp IC 741 which provides a constant flow of current through the base-emitter junction of NPN transistor BC107 named Q. In the BC107 the voltage across the base-emitter junction of the transistor is proportional to its temperature. The transistor used this way makes a low-cost sensor.

You can use a silicon diode instead of a transistor. The  Science Kits small variation in voltage across the base-emitter junction is amplified by a second operational amplifier before the temperature is displayed on the meter. DIY Kit Digital Thermometer preset is used to set the zero-reading on the meter and preset PR2 is used to set the range of temperature measurement. The IC7660 performs supply voltage conversions from positive to negative. The entire circuit works off a 5V.

Block Diagram

Digital thermometer circuit using IC 741

Physical Attributes

  • Dimensions (cm) L x W x H : 20 x 15 x 5
  • Weight (gm): 200

Product Video

Customer Reviews

Based on 2 reviews
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B
Bokul mandal
Soldrnng

Straightforward kit for beginners, but buy better solder!

K
Kanagarajsavitha
Great entry level kit to electronics

This kit was very user friendly. My son and I assembled it in a few hours. The directions were straight forward. There are parts of the instructions that go over operation theory.