My DIY automatic chicken POP door opener/closer

[Mouthpear]

Curious ... Where do you find a timer that you can set for 1 minute ?

MOST digital timers can be set for one minute. Usually that's the smallest increment of time that is settable.

 

[Mouthpear]

the chicks are in absolute no danger of being hurt by the door!

What makes you so certain?

How is it doing? Have you had many problems? Have you changed to a more reliable setup? How is the UPS doing?