Bidirectional control of a Peltier element - PhysLab

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Bidirectional control of a Peltier element

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Researchers Muhammad Sheroz Malik
Time Frame Summer 2016
Supplementary Materials Student Report
Peltier Heater Control VI File
Circuit Diagram
Description

A bi-directional current source is needed so as to exploit the Peltier device’s heating and cooling phenomenon: one face of the device heats up when current flows in one direction and the same face cools down if the current through it flows in the opposite direction.

The idea is to use transistors as a voltage to current amplifiers. The op-amp is used to complement the same purpose: it provides the initial voltage signal at the base of the transistor so that the transistor may operate at such ADC-biased base voltage configuration where current to voltage amplification takes place. Another consideration is the fact that the DAQ (we use DAQ as out input voltage source) only provides a certain amount of output voltage. Keeping this practical constraint view, the op-amp or any voltage to voltage amplification device becomes a necessary part of the circuit.

Mainly, following components have been used:

  • Dual polarity power supply
  • 741 Op-amp
  • Resistors of various values as indicated in the diagram above
  • BJT BD 243C (NPN transistor)
  • BJT BD 244C (PNP transistor)
  • Betatherm NTC thermistor 2.2k3A359I
  • NI-USB 6001
  • Peltier device labelled as LOAD in the above diagram

 


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    • Lab-I (ENGG-100/PHY-100/200)
    • Lab-II (PHY 300/500)
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    • Ibn Sahl Corner for Optics
    • Fast Optics
    • Smart Physics
    • Single Photon Quantum Mechanics Lab
    • Chasing Cosmic Ray Muons at Physlab
    • Stories
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    • Research Stories
    • Class Activities
    • Courses Taught
    • Class Demonstrations
    • PhysDiary
    • Health and Safety
    • Lab Safety
    • Workplace Organization
  • Research
    • Research Themes
    • Research Internships
    • Research Stories
    • Physics WorldCup
      • International Young Physicists’ Tournament (IYPT) 2019
      • International Young Physicists’ Tournament (IYPT) 2018
      • International Young Physicists’ Tournament (IYPT) 2016
    • Hunerkada
    • Grants
    • Theses and Reports
    • Scientific Publications
    • Invited Talks (Selected)
  • Outreach
    • Media
      • Lectures, Podcasts and Interviews
      • Videobytes
      • YouTube Channel
      • Visitors
      • Testimonials
    • The Scientific Mind Through the Eyes of a Physics Experimenter
    • National Laboratory Immersion Program
      • First Lahore 2012
      • Second Sukkur 2013
      • Third Lahore 2014
      • Fourth Lahore 2016
    • Labview Workshop 2016
    • Open house
      • 2009-2015
      • Open house 2023
    • Khwarizmi Science Society
    • Helping Pakistan’s Universities
      • National University of Technology (NUTECH) 2019
      • Pakistan Institute of Engineering and Applied Sciences
        (PIEAS) 2019 (Final Phase)
      • Pakistan Institute of Engineering and Applied Sciences
        (PIEAS) 2019 (Phase 2)
      • Pakistan Institute of Engineering and Applied Sciences
        (PIEAS) 2018 (Phase 1)
      • National University of Science & Technology 2016
      • Habib University 2014
      • Preston University 2013
      • Ghulam Ishaque Khan Institute of
        Engineering Sciences and Technology 2011
      • Institute of Space Technology 2010
    • The National STEM School
      • STEM School (2018 – 2019)
      • STEM school (2016 – 2017)
    • Abdus Salam Memorial Lecture Series
  • Facilities
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    • Devices & Softwares
      • PhysPlot
      • Physlogger
      • Phystrack
    • Mechanical Workshop
    • Inventory
    • 3D Printed Galleria
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    • Equipment Howto’s
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