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Basic toy ski lift.

GaryGav

Nov 18, 2014
1
Joined
Nov 18, 2014
Messages
1
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
 

KrisBlueNZ

Sadly passed away in 2015
Nov 28, 2011
8,393
Joined
Nov 28, 2011
Messages
8,393
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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