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[stim2005]

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[Faraday]

Want actual instructions? This is the way I would do it:

1. Build a linear actuator. I happen to like this company and some of their stuff.
2. Don't use an Arduino, use a Raspberry Pi. Connect it to the internet. Install Node.js on it.
3. Create a Node.js application using the Johnny-Five library to control the motor
4. Create a Node.js application using Express to set up a web app that can control the motor

You'll need to know electronics so you can work the motors with Johnny-Five and enough JavaScript, HTML, CSS to set up the web server as the interface. JavaScript you can learn from Eloquent JavaScript Chapters 1-6. It's a book but it has a whole lot of personality. HTML and CSS I would recommend Scrimba's interactive video tutorials, you can literally edit the code in the tutorial live to experiment if you pause the video.