“Project time ! : Automatic curtain opener/closer.
I did see some other projects for closing and opening (automatically) the curtains, I certainly wanted to build one myself now.
Most other designs I saw were built using a fishing line. I did not want to use a fishing line, because fishing lines always will break at some point ?
For this automatic curtain I used a teethed timing belt (with metallic enforcement, so very strong) and a timing pully wheel (20 teeth), which are also used for some 3d printers.
Aim was that the curtains will open and close automatically, when it gets light or dark, and a manual override of course. I considered a timer too with a RTC, but so far this works fine now, without a RTC.”