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Basic toy ski lift.

Discussion in 'General Electronics Discussion' started by GaryGav, Nov 18, 2014.

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  1. GaryGav

    GaryGav

    1
    0
    Nov 18, 2014
    Hi I have basically no knowledge of electronic circuitry so I am looking for some advice on the most simple way of constructing a motorised ski lift as a moving christmas decoration.

    I basically want it so that a motorised pulley will pull little cardboard ski lifts up and down in opposite directions. I want them to travel one way for a certain number of seconds and then reverse direction.

    I would appreciate if someone could point me towards something I could put into a simple battery pack and maybe two of these motors, http://www.jaycar.co.uk/productView.asp?ID=YG2741&form=CAT2&SUBCATID=983#1 , circuit that would auto reverse the motor direction every few seconds.

    Apologies for the terrible sketch attached i'm just in a rush at the moment.
    really rough sketch.jpg
     
  2. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

    8,393
    1,271
    Nov 28, 2011
    Hi there and welcome to Electronics Point :)

    I think you would be better to switch the motor direction by detecting the position of the cord, rather than relying on a timer, because there will be variations in how far the cord will move for a given run duration and it would be difficult to get a simple timed device to run unattended for a period of time without the starting/ending positions of the "chairs" drifting.

    That would also make the control mechanism simpler; you could use a DPDT toggle switch (https://www.google.com/search?q=reversing+switch+schematic&tbm=isch) to control the motor directly, and arrange for the switch to be flipped by little "tags" you would attach to the cord. This would work best with a switch with low activation force.

    What do you think?
     
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