A demonstration of my automatic blind controller using Alexa via the remote. All parts were designed and 3D printed. Control is via an Arduino nano and RF switch. See my other videos for assembly. Further details and 3D printable parts available via thingiverse:
https://www.thingiverse.com/thing:2631414
As well as the 3D printed parts, you will need the following items:
1 x L298N 2 Channel DC Motor Driver
https://www.banggood.com/Dual-Channel-L298N-DC-Motor-Driver-Board-PWM-Speed-Dual-H-Bridge-Stepper-Module-p-1162946.html?p=KF2715792233201409DJ
1 x DC 12V Worm Gear and Motor (10-50 rpm)
https://www.banggood.com/DC-12V-356065110220rpm-Worm-Gear-Box-Reduction-Motor-p-1197020.html?p=KF2715792233201409DJ
1 x Arduino Nano
https://www.banggood.com/ATmega328P-Nano-V3-Controller-Board-Compatible-Arduino-p-940937.html?p=KF2715792233201409DJ
2 x DC Female Jacks
https://www.banggood.com/10pcs-5_5-x-2_1mm-DC-Power-Supply-Female-Jack-Socket-p-1062018.html?p=KF2715792233201409DJ
1 x IC2262 RF Transmitter/Reciever (433/315MHz depending on country)
https://www.banggood.com/IC2262-2272-M4-4-Channel-Wireless-Remote-Lock-Receiving-Board-With-Remote-Control-p-1031857.html?p=KF2715792233201409DJ
1 x Small PCB Board
https://www.banggood.com/40pcs-FR-4-Double-Side-Prototype-PCB-Printed-Circuit-Board-p-995732.html?p=KF2715792233201409DJ
1 x 12V DC PSU
Various M3 Bolts
Ribbon Cables and Dupont Connectors
1 x Yellow LED
1 x Green LED
2 x Plastic Square Buttons
6/7 Resistors
1 x Photo Resistor (Optional)