I have 6 blinds I'd like to control with the Google assistant via voice commands. I purchased a raspberry pi 3 that I plan to use as a hub in my house. The pi will run openhabian as its OS. I want to be able to control each blind individually, in sets of 3 for each room, control a percentage of open/close, and possibly set schedules. There are several YouTube videos on this, but my application will be a little different I'm sure. I don't have any experience with this, so when it comes to actually programming this stuff I'm sure I'll have a lot of questions.
I saw a YT video where a guy can contol several servos off one Arduino uno and another board.
From my understanding he directly powers the other board featured in the video with a single 5v 2A power source. This powers the servos directly from the board and then the Arduino is powered off this accompanying board too. Is this correct? Is this a smart setup? It would save me from buying two power sources, a power strip to plug them into my outlet, and 2 additional Arduino boards. Which, by the way, this is the cheapo ebay board I was looking at. It has the esp822 (I think that's the number) wifi module already installed. It has a micro USB programming port on it, so I can program with an old phone charger cable
Next question; has anyone cut into a power supply cable like this one from Amazon to lengrhen it?
[2 PACK] BOLWEO AC 100-240V to DC 5V 2A Power Supply Adapter, 10W Adapter for TV Box, LED Strip Lights ,Audio/Video, Wireless Router,DC Connector Jack 5.5mmx2.1mm
I'm not sure if I could stand to lose any voltage over the increased length though. I'd like to have a 15'-17' cable. If I can't lengthen the cable on the power source I guess I'll have to run an ugly extension cord around the side of the window and hide the power source box and extension cord in the blind reacway somehow. If I have to do this, it'd be even better if I could only use 1 Arduino to eliminate power sources and extension cords.
What's the best way to power the Arduino and the servos? Can I power the servo right off the Arduino 5v? How can I best power 3 servos off one Arduino? Solutions need to be coming off 120v. These are blinds in my house that I'll be using every day and worrying about batteries will not be an option.