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A circuit for regulating a Silicone Heater Mat

Discussion in 'Electronic Basics' started by confused2, Aug 28, 2007.

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  1. confused2

    confused2 Guest

    Hello all,

    I am very new to electronics and need to build a simple 12V dc
    circuit, which will keep a heater mat at a fixed temperature... ie
    switch it on and off depending on tempterature. I guess I need a
    device that measures the temperature and opens a switch when that
    temperature is reached. Is there an electronic device that will do
    that?

    Thanks
    Alex
     
  2. Bob

    Bob Guest

    The simplest way may be to get a heating pad and use its electronics to
    control your mat. As long as the heating pad uses a simple on/off series
    switch to control the temperature then it should work.

    Bob
     
  3. Ross Herbert

    Ross Herbert Guest

    http://www.gibsonteched.com/ck112.html
     
  4. Guest

    Hello Alex
    I am Phuong
    I can answer your question with my idea:
    If you need a device that measures the temp and opens a switch when
    that
    temperature is reached.I think the simple you should use the
    microcontroller with AD converter as AVR,PIC or 8051 +AD0804.It so
    easy to programming that you need.If you interested in this ,pls
    email for me :
     
  5. I have friend who makes a temperature-regulated silicone heater mat. It
    used a simple IC and a power MOSFET. It was the LM56 low power thermostat.
    You can contact him at www.patcoinc.com.

    A good primer on temp control is:
    http://www.wici.com/technical_info/articles/temp_prm/tmprmch1.htm

    Also National's Temperature Sensor Handbook (which describes the LM56):
    http://www.national.com/appinfo/tempsensors/files/temphb.pdf

    Some other sensors are LM34, LM75, LM86 and LM134, or you can look at some
    chips from Maxim:
    http://www.maxim-ic.com/products/sensors/temperature_switches.cfm

    Paul
     
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