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First Project

Discussion in 'Electronic Basics' started by Rahein, Oct 14, 2005.

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  1. Rahein

    Rahein Guest

    This is my first time building anything like this my self, and I don't
    really know where to start.

    I want to make a small (~12 cubic inches) chamber with a heating
    element in that heats the air to a temperature of 200F-400F, which can
    be adjusted. When the air reaches the set temperature a thermostat will
    kick the heating element off and light an indicator light. It would be
    powered by an attached battery pack.

    Can anyone point me to some resource that can help me on my project?
    Any help you can give would be great.

    Thanks
    Rahein
     
  2. Tim Williams

    Tim Williams Guest

    Yeah, hook up an op-amp to the thermistor and a voltage reference. When
    Vtemp > Vref, op-amp switches off the heater. (Drive the heater thru a nice
    transistor or MOSFET.) Calibrate the temp with a thermometer and you're
    done.

    As for actual refs...Google op-amps.. transistors.. resistors.. capacitors..
    and the nature of the universe itself.

    I do however question the usefulness of your project. Do you realize how
    many batteries this is going to go through to keep it heated for ten
    minutes? You'd better have aerogel insulation in there.

    Tim
     
  3. Rahein

    Rahein Guest

    Thanks, I will look up those terms latter today when I have some time.

    The air does not need to stay at that tempature. Just warm up to the
    correct temp and then shut off. There is nothing stopping me from
    plugging it into the wall, I just thought that would increase the
    difficulty and cost. There may be better ways to make this, like I said
    it is my first project.

    PS: On www.omega.com is their FREE litature really free, or is there
    some catch?
     
  4. John Fields

    John Fields Guest

     
  5. Rich Grise

    Rich Grise Guest

    It's finals week.

    Cheers!
    Rich
     
  6. Rich Grise

    Rich Grise Guest

    http://www.google.com/search?q=thermostat

    Good Luck!
    Rich
     
  7. Why not a toaster oven?
     
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