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Building an automatic egg turner can be accomplished several ways. The main part of the turner is nothing more than shelves that pivot from side to side moved by an arm on a electric motor. Making it stop where you want it to an then start back up again later is the tricky part.

To make the motor stop you need a pressure switch an a cam that is high for 180 degrees an low for the other 180 degrees.

To make it start again you need a low speed motor like the ones used on turners in small foam incubators. You also need another cam an pressure switch.

Wiring should look something like this...



The motor on the left is the main motor an the one on the right is the timer motor. When the right switch is moved it powers the main motor until the left switch moves.

Here is a video of this setup at work. I am moving the pressure switch myself to speed up the proses.




Another option is to replace the timer motor an pressure switch with a relay powered by a power inverter an a light timer like this.



That wiring would look like this...



The orange circle would be the light timer an the red box would be the power inverter.