Useless machine application

Discussion in 'The Projects Forum' started by bio88, Feb 17, 2011.

  1. bio88

    Thread Starter Member

    Feb 17, 2011
    Believe it or not I have an actual application for the world's most useless machine. Similar to the machine/box I have a project with a hinged lid that goes from horizontal (home) to 90 degrees vertical - waits 10 seconds and returns to home. Rotation is by a small DC gear motor with clutch. Right now I control manually with a DPDT switch.

    I would appreciate any suggestions/pointers on how to make this automatic.

    Cycle/Sequence is:

    Make N.O. Momentary switch

    DC motor spins clockwise until...

    rotating lid engages micro switch and hard stop

    roughly 8-10 second pause

    DC motor spins counter clockwise returning lid to home (hard stop).

    Micro switch at home position turns off motor.

    Cycle is reset to a wait state.

    I think my first challenge is (removing the pause) getting the cycle to work with a momentary initiation switch. Useless machines use a latching switch..
    Last edited: Feb 17, 2011
  2. Markd77

    Senior Member

    Sep 7, 2009
  3. kubeek

    AAC Fanatic!

    Sep 20, 2005
    Something like this?
  4. bio88

    Thread Starter Member

    Feb 17, 2011
    That is a slick package - thanks for the link!

    The Most Useless Machine referenced is actually where I got my idea to make it simple as possible. Looks like that relay has the momentary issue covered - now just need to incorporate a delay. Cool stuff!

    Thanks for your comments. Trust me - the final product of my project is far from useless.
    Last edited: Feb 18, 2011
  5. bribri


    Feb 20, 2011
    i'm sorry, but the machine is not useless. it opens and closes the lid of a box. very useful.