Motorized Venetian blinds
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Do you have ball cord driven Venetian blinds and do you want them automated?
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Model information
- Source
- Printables
- Category
- Bedroom
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
Do you have ball cord driven Venetian blinds and do you want them automated? This project is direct drive approach with low cost stepper motor.
Print instructions
I have many windows with ISSO style venetian blinds (type with ball chain pull). For some time I wanted to automate them but of the shelf solutions would get quite expensive just due to number blinds needed to be automated (just for bedroom I need six of them).
I looked at some DYI options using chain puller wheels but those were chunky and not very reliable. Therefore, I have decided to make my own try and here is a result.
I have decided to integrate everything into blinds holder and replace integrated pull cord assembly. I designed new blinds holder and motor + electronics mount. This allowed me to do 1:1 swap manual--> electronic, which is reversible.
I am using 28byj-48 stepper motor running on 5V (USB supply powers everything), which is quite cheap but low torque. For my blinds, it is sufficient but for bigger ones change to 9-12V or rewiring to bipolar setup may be necessary. This motor drives via right angle 1:1 helical gears blinds shaft. Motor is driven by ULN2003 (came in set with motor) from WeMos D1 mini. I have mounted everything on custom PCB for easier assembly and to hold push button.
For more see https://community.home-assistant.io/t/project-venetian-blinds-isso-esphome-wemos-d1-mini-28byj-48-stepper/193931
What to print?
- gear set
- base
- housing
- cube
Note: Depending on drive position you may need to mirror parts (holder and base)
Other parts needed
- stepper motor+driver
- custom PCB (optional)
- wemos d1
- some screws and nuts
Assembly is quite easy:
- remove blinds from window (be cafefull with strings)
- remove old chain assembly (keep it just in case)
- put cube on the axis + washer + helical gear
- insert nuts into base
- fix cube to the base
- slide cube+base into blinds shaft housing
- fix the blinds back to the window
- assemble motor and electronics (do not forget to programme wemos d1)
- put motor with alectronics into printed housing a bit of hot glue hels to keep it in place