alien territories comparator,filter circuits

Discussion in 'General Electronics Chat' started by adis24in, Jun 8, 2008.

  1. adis24in

    Thread Starter New Member

    Jun 8, 2008
    1
    0
    hi.im a mechanical engg student to start with....
    id like to know how i can go about filtering and then comparing a voltage signal from a thermocouple...using a cheap, easily available devices.
    i want to actuate solenoids frm this signal...do i really want a microcontroller for it....?
     
  2. nanovate

    Distinguished Member

    May 7, 2007
    665
    1
    Ad595 + Lm311 + Bjt
     
  3. thingmaker3

    Retired Moderator

    May 16, 2005
    5,072
    6
    The AD595 is indeed a handy chip. No need for the LM311, as the AD595 has an on-board comparator. (See figure 9 of the datasheet.) A BJT may or may not be able to drive the solenoid, depending on specs. A Darlington pair or a MOSFET with driver should work nicely.

    Adis, can you share the specs on your thermocouple and solenoid? Also, what are your temperatures of interest?
     
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