Electric Roller Shade Lifter
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Description
The roller shade switch needs to be manually pulled open. Connecting it to the Mijia ecosystem allows the shade to open automatically every morning when you wake up. However, ready-made products on Taobao cost over 300 yuan and none of them support both Wi-Fi and external power. So I bought some parts and made my own.
BOM
Reduction gear motor, 18 rpm, 12V, single output shaft, 19.8 yuan
https://item.taobao.com/item.htm?_u=u1m4b539e6d&id=559929434820&spm=a1z09.2.0.0.6e4b2e8d8tSJMD
Mijia ecosystem integration
Mijia MESH motor forward/reverse control Wi-Fi access module, 45 yuan
https://item.taobao.com/item.htm?_u=u1m4b53f016&id=735724278703&spm=a1z09.2.0.0.6e4b2e8d8tSJMD
12V DC power module (optional), 10 yuan
M4*12 hex socket countersunk screw 3 pieces (for fixing the upper and lower shells)
M3*8 hex socket button head screw 1 piece (for fixing the bead turntable to the motor)
M3*12 hex socket countersunk screw 2 pieces (for fixing the motor to the bottom shell)
M4 plastic expansion tube + screw 2 pieces (for fixing the controller to the wall)
US standard 220V plug 1 piece, 0.5 square wire several
The shell is printed with PETG, 0.2 layer height, 30% infill, 4 walls.
Making your own can meet the basic needs of electric lift switches. The only drawback is that Mijia identifies the connected switch as a four-button switch and can only define the dwell time of the switch. That is, it defines how many seconds the switch will close after the No. 1 switch is turned on by default. Depending on the motor speed and the height of the blinds, you can test it yourself to find out. Then set the two buttons to up and down respectively. This method cannot dynamically define the position where the curtain rises, which is a bit of a pity. You can use Xiao Ai Tongxue to control it.
If you have any questions, you can send me an email at nizongdai@me.com to discuss.
License
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