The 7″ kindle fire is a great deal for a tablet, when you can pick up 5 of them and get 1 free it’s pretty hard to resist trying out as a home automation tablet. So I bought 5 of them.

My goals were:

  • No visible wiring
  • Clean mounting
  • Easily removed to deal with software updates and stuff

 
After an afternoon, I ended up with something that satisfied all these requirements:

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Step 1: Ripping them apart

This was easy. Insert knife or other tool into the crack, and pry it apart. They come apart reasonably easily and go together just the same.

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Step 2. Finding Power

I tapped into VCHG on the usb port and ground on the outside of the usb connector, visible in the top left.

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Step 3. Adding a power cable

I drilled a hole in the back and dropped a JST pigtail through, since I didn’t want to have to drill a wall hole big enough for a USB cable. I didn’t think to grab a picture of this actually soldered, but see below for a closer example.

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Step 4. Making the USB charger fit in a regular electrical box

This is probably not to electrical code. I take no responsibility for burning down your house. If my insurance company is reading this after I burnt down my house, I swear these pictures are not of my house.

Wrap cable around prongs, apply solder, heat shrink, bend it to make it smaller, wrap it in more tape, then shove it into the wall. Not pictured here is the modded USB cable that now has a JST connector where the microusb connector used to be.

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step 3. Magnets!

I discovered the back of the Kindle was magnetic, so after trying magnets of various sizes I found 4 that seem to hold it on reasonably well.

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I’m *sure* there’s a cheaper source online, but I bought these locally since it was faster. I used the 1″ magnets, cups and high-friction disc’s listed here: http://www.leevalley.com/en/hardware/page.aspx?p=32066&cat=1,42363,42348 With 4 of them the tablet is reasonably well secured, but without the high-friction discs it would definitely slide down.

Step 4. Wireless? Why not.

Although most were going onto walls, I also wanted one or two portable ones. My intention is to do another wall mount where you can just pull the tablet off and use it on the couch, then you drop it on and it lines up with the charger. This is a cheap USB addon charger I got off amazon.

Deciding on positioning:

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Chop the micro usb connector off and scratch the coating off with a knife to expose bare metal:

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Test with a charger to confirm polarity:

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Solder and wrap in tape:_DSC0492

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Soldered in and taped down. The back has an ever so slight bulge near the USB connector due to the thickness of the power wiring I used, but otherwise it’s pretty much unnoticable.

Successful wireless charging!

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Step 5: Software

I use the stock kindle OS still, but they’re all rooted to install the play store and nova launcher. From there I use Imperihome. I’m not going to get into how to root it since that changes frequently based on the kindle OS version and amazon’s updates. Look on the xda-developer forums.

Car PC

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July 4, 2013 // Projects

Way back in 2005 I decided to jump into the car pc craze and remold my dash with bondo to install a 7″ touch screen, then paint it all metallic red:

Car PC
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So I’ve been eyeing the Lowepro Photo Sport 200 for a while but was concerned that it wasn’t going to fit my new 100-400L. Decided to just check it out locally and happened upon a brand new model, the Lowepro Photo Sport Pro 30L which seemed an ideal match. Supposedly this model just came out and there’s 0 reviews for it online, so here’s a quick overview if you’re interested in the bag.

It looks like a pretty standard outdoor / travel backpack with side access so you can get your camera out without removing the entire bag. The back is pretty comfortable and I plan to use this as my main travel day pack. Overall it seems like a solid bag for anyone who needs a day pack capable of carrying body + 2 larger lenses, with a top compartment more than big enough to stash anything else.

 

wpid228-IMG_8863.jpg
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Cat Scrabble

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March 19, 2013 // Photography

Cat Scrabble

Sous Vide

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November 17, 2011 // Projects

Read a bunch about sous vide online and decided I wanted perfect steaks with minimal effort, so it was time to do a ghetto $75 immersion circulator build.

Started with two plastic storage tubs stacked for some basic insulation:


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Mario Wallpaper

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June 30, 2006 // Projects

I reproduced level 1-1 from Super Mario 3 in html/javascript form to be used for active desktop. It’s not finished, but still pretty awesome.

Click here to download or click on the image below for a demo

Mario demo
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