Blinking Eye Model

Discussion in 'The Projects Forum' started by CJW0005, Apr 26, 2012.

  1. CJW0005

    Thread Starter New Member

    Apr 26, 2012
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    I need to make a blinking model of the eye for an experiment. All I need to get the blinking motion right. The model of the eye is stationary but the upper eyelid needs to move up and down at a fixed interval.

    The first prototype uses a gearbox to make the eyelid move up and down but it is not ideal as it is slow and continuous. What I want is to use something like a linear actuator to make the eyelid blink relatively quickly and immediately retract, pause for 10/15 seconds, blink, pause 10 seconds, and repeat ad infinitum. Is this possible?

    I am looking for a timer/resistor/controller/anything capable of programming the timing, the best way to automatically reverse the linear actuator, and the best type of motor/gear box/anything to use.

    Thank you for any suggestions.

    Edit: I need the eye to test contact lenses on and will have tear fluid dispensed under the eye lid. The eye is a hollow sphere we will have warm water in. I need the mechanism to produce the blink that I can adjust to custom parts.
     
    Last edited: Apr 26, 2012
  2. wayneh

    Expert

    Sep 9, 2010
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    I just took a Furby apart the other day. If these were before your time, look 'em up. Big blinking eyes. (And a lot of other functions.)
     
  3. strantor

    AAC Fanatic!

    Oct 3, 2010
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    How about a car door lock solenoid, switched by a MOSFET, triggered by a comparator fed by a RC time circuit?
     
  4. russpatterson

    Member

    Feb 1, 2010
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    I'd agree with the solenoid/MOSFET approach, and some kind of spring to pull the eye-lid back immediately after the blink. So some mechanical setup that would let the solenoid do it's then then be out of the way for the spring. A cam or something.

    I would use a microcontroller instead of RC time circuits. PICAXE or Arduino would be the easiest route in the the uC's
     
  5. djsfantasi

    AAC Fanatic!

    Apr 11, 2010
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  6. t06afre

    AAC Fanatic!

    May 11, 2009
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    From the top of my head. I would have use some kind of electromagnet with a spring. to pull it back. Do you have some pictures to show us. Showing your current setting
     
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