Replaced the complicated wiper door lift mechanism on my chicken coop with this one. It took about 10 minutes to install on my existing sliding door. I have 2 SPST relays and a photoelectric eye, which took me a while to figure out, but it's working fine now. The chickens were a little bothered by the new sound, but have gotten used to it now. I'm glad these things are available at this price.
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