Sensor for linear measuring

Discussion in 'General Electronics Chat' started by nqchanh194, Nov 21, 2014.

  1. nqchanh194

    Thread Starter New Member

    Jul 5, 2013
    27
    1
    Hi all,

    I'm studying to design a linear measuring tool like a digital calliper.
    I've been considering optical encoder from Avago technology but current consumption is up to tens of mA which is not suited to my design using a battery cell.

    My expectation for sensor is as follow:
    -Average current consumption is 3 mA or less.
    -Price: less than $10 USD.
    -Resolution: 0.25 mm or less.
    -Measuring range: 20 cm or more.

    Hope someone give me some suggestions. Thanks.
     
  2. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    most mfgrs of digital calipers and micrometers use optical encoders, so there must be some out there somewhere.
     
  3. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,507
    2,367
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