Comment by madaxe_again

I think the principle two things are “they can’t pull it off the wall and onto themselves” and “they can’t hang themselves”.

With automatic openers you add “they can’t get snarled up/lose a finger in the mechanism” and “they can’t electrocute themselves”.

I went extremely belt and braces with our blind opener - but it is toddler proof. Attached the lower end of the cord to the ceiling, attached a pulley that hangs on the cord, hung a 1kg weight from it, and used a solenoid from a broken linktap valve to pull a pin that allows the weight to fall and pull the cord.

Even with the blinds open the whole assemblage is entirely out of her reach, and it goes for the opposite effect to the poster’s implementation - blinds slam open in about half a second with a quiet whirr, as I prefer a jarring wakeup, and my wife would sleep through Armageddon. Reset is manual, but that’s fine, closing them is an optional and trivial activity.