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Irrigating Your Garden With an Op Amp. w/ "humidity sensor"

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  • David Hoffman
    Irrigating Your Garden With an Op Amp. w/ humidity sensor ... Subject: [New post] Irrigating Your Garden With an Op Amp Date: Mon, 6 May 2013 From: MAKE Post
    Message 1 of 1 , May 6, 2013
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      Irrigating Your Garden With an Op Amp. w/ "humidity sensor"

      -------- Original Message --------
      Subject: [New post] Irrigating Your Garden With an Op Amp
      Date: Mon, 6 May 2013
      From: MAKE

      Post : Irrigating Your Garden With an Op Amp
      URL :
      http://blog.makezine.com/2013/05/06/irrigating-your-garden-with-an-op-amp/
      Posted : May 6th, 2013 at 8:14 am
      Author : John Baichtal
      Tags : component of the month, op amp
      Categories : Electronics, Gardening

      Instructables user diy_bloke built this op-amp controlled pump for his
      garden, using the classic 741 operational amplifier. He wrote a very
      detailed how-to including showing how to etch a PCB, as well as how to make
      a humidity sensor out of gypsum: The simplest form of a soil humidity
      sensor is made from two galvanized [...]

      Read more of this post
      (http://blog.makezine.com/2013/05/06/irrigating-your-garden-with-an-op-amp/)

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