DIY Tablet Powerful Easy to Make Relatively Cheap

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DIY tablet: Powerful, Easy-to-make, (relatively) cheap [Part 1: the guts]by TeddyIndustries on March 5, 2015

Table of Contents

DIY tablet: Powerful, Easy-to-make, (relatively) cheap [Part 1: the guts] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Intro: DIY tablet: Powerful, Easy-to-make, (relatively) cheap [Part 1: the guts] . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Step 1: Odroid performance comparison to 2014 tablets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Step 2: International shopping! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Step 3: Putting it all together . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Step 4: Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Step 5: This is not the end! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

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Author:TeddyIndustries My official page here!Hi! I'm Thaddeus and this is the bit of the internet where I post about my various projects and ideas to solve problems, and to one day, make the world abetter place to live in.

Intro: DIY tablet: Powerful, Easy-to-make, (relatively) cheap [Part 1: the guts]Hi everyone! This is my first Instructable and I'm really excited to share it with you! Now, given that you are on this site or app, I'd guess that you'd probably have at leastone idea that hit you like a baseball bat and then occupied the outer fringes of your neocortex ever since. This happened to me on the train one day as I was gazing atthe screen tethered crowd, and I thought, "Hey, what if you could make your own tablet?"

I then proceeded to scour the internet for guides and 'how to's and came upon this great guide by Michael Castor detailing how he made his own tablet using aRaspberry Pi here. With flashy battery lights, a carbon fibre backing and a dashing walnut finish, the only things I wasn't particularly fond of were the Raspberry Pi andthe difficulty in constructing it. I wanted something with a little (actually a lot) more kick to it that wouldn't cost three quarters of the project. So I turned to the Odroid U3for several performance buffs and its similarly great community. The next step will further detail the performance.

Several things to note:

All prices are in USD unless stated otherwise

All prices and currency conversions are as of 2 Jan 2015

Step 1: Odroid performance comparison to 2014 tabletsEnough of the unnecessary but poignant back story. Its time to put my money where my mouth is and show the numbers. I selected a couple of benchmarks based on arange of activities that one would do on one's tablet and benchmarked it against the best tablets at end of 2014 according to Techradar, and the Raspberry Pi of course.

Geekbench - processor and memory performance (Higher is better)1.Peacekeeper - Measures online speed from browser (Higher is better)2.Sunspider - Measures speed of javascript (Lower is better)3.

Now, as you can see, the Odroid's performance is quite close to that of the Galaxy tab and is quite sufficient for my everyday tablet needs. While it may not exactly havethe power of an iPad air 2, the total cost of the project is lower than that of the iPad and you'll get the cool, geeky bragging rights to say you made your own tablet.

Another point I should mention is that the Odroid U3's power consumption is just over 1A or at most 2A at 5V, which is pretty good to most power banks and the tablet'sbattery life.

References:

http://browser.primatelabs.com/geekbench2/2422084

http://browser.primatelabs.com/android-benchmarks

http://browser.primatelabs.com/ios-benchmarks

http://www.macworld.co.uk/review/ipad/apple-ipad-a...

http://www.notebookcheck.net/Samsung-Galaxy-Tab-S-...

file:/member/TeddyIndustries/file:/member/TeddyIndustries/http://https://www.facebook.com/TeddyIndustrieshttp://www.mkcastor.com/2014/01/02/pipad-build/http://www.hardkernel.com/main/products/prdt_info.php?g_code=g138745696275http://browser.primatelabs.com/geekbench2/2422084http://browser.primatelabs.com/android-benchmarkshttp://browser.primatelabs.com/ios-benchmarkshttp://www.macworld.co.uk/review/ipad/apple-ipad-air-2-review-updated-3544035/http://www.notebookcheck.net/Samsung-Galaxy-Tab-S-10-5-Tablet-Review.124253.0.html


Step 2: International shopping!A DIY tablet basically consists of 3 main things. A tiny computer, a touchscreen and a battery pack. Do note that all shipping costs are from the country of origin toSingapore, so costs might vary based on where you live.

A. Korea

You'll need to pick up the following things from this site: Hardkernel

1. Odroid U3 - USD65 - The tiny computer

2. RTC Backup battery - USD2.50 - Maintain system clock

3. Odroid U3 case - USD4 - for good measure

4. USB DC plug cable 2.5mm (at least 2 units!) - 2X USD1.9 - Used to connect the Odroid and the touchscreen to the battery pack. Difficult to find elsewhere.

5. WiFi Module 4 - USD14

6. 8GB SD/eMMC module U Android - USD8/USD25 - Whichever fits your wallet and attention span, eMMC is much much faster than SD. You could use your own SDcard, but remember that 8GB is the minimum. Also, feel free to buy one that has a greater size if you want.

7. HDMI Cable(Micro, type D) - USD5.70

8. Shipping - USD30

B. Malaysia

The next place you'll need to visit is here: Chalkboard Electronics

1. 10" universal LCD with HDMI interface and capacitive multi-touch - USD134.95 - This module is unique as it requires a 5V power supply, whereas most others require12V. This allows the board to be powered up by about any standard battery pack. Do note you can also buy the 7" option if you want, but not the 14" and 15.6" versionsas they require 5.5V. Do also note that out of the box, single touch is supported and if you want multi touch, you will have to update the firmware and kernel as describedin the chalkboard electronic blog.

2. Shipping - USD33.60

C. Your local electronics store

If you live in Singapore, I got all my stuff from the infamous Sim Lim Square.

1. HDMI type A to type C converter - SGD5/USD3.62 - The Chalkboard electronics Screen receives a type C HDMI input.

2. USB male to USB mini male - SGD3/USD2.17 - The Chalkboard electronics board uses a USB mini input from the Odroid to get touchscreen data.

3. 12,000mAh Battery pack with dual charging ports - SGD19/USD13.77 - The power supply for the tablet. The dual ports are needed to simultaneously power the Odroidand the Chalkboard electronics Screen via the USB-DC plug cable from Korea. Do note that some power banks cut power off when the Odroid and screen are plugged in(too much current drawn), so the best way to check is to bring the Odroid and screen down to the electronics store and test it in store.

Total cost (excluding shipping): USD257.51

Total cost (including shipping): USD321.11

http://www.hardkernel.com/main/products/prdt_info.php?g_code=g138745696275http://www.chalk-elec.com/?page_id=1280


Step 3: Putting it all togetherHere comes the fun bit! There is this certain mad scientist satisfaction derived from connecting electronics that you should begin to feel once starting this section. It helpsto that no soldering is involved and all you need to do is simply connect one end to the other.

Firstly, start off by connecting the RTC backup battery and the SD/eMMC module to the Odroid.

Pic 1:

Connect the HDMI cable to the HDMI type A to type C converter.

Pic 2:

Connect the HDMI micro, 2.5mm USB to DC cable, WiFi module and USB to USB mini cable to the Odroid.

Pic 3:

Connect the 2.5mm USB to DC cable to the chalkboard electronics screen.

Pic 4:

Connect the Odroid cables to the Chalkboard electronics cables. You should have 2 USB type A cables not plugged in anywhere.

Pic 5:

Connect these two cables to the portable power supply. If luck is in your favour, you should see the android logo on the chalkboard electronics screen within a minute.Proceed to grin like an idiot and skip to the last step.

Image Notes1. Attach the HDMI cable to the HDMI A to C converter

Image Notes1. Attach HDMI cable here


2. USB to DC 2.5mm cable3. WiFi module 44. USB to USB mini

Image Notes1. USB to DC 2.5mm cable

Image Notes1. HDMI type C2. USB mini3. USB to DC 2.5mm cable4. remaining USB cable5. Remaining USB cable

Image Notes1. Plug the remaining USB cables into the battery pack

Step 4: TroubleshootingWhen I first made my tablet, I was tearing my hair out because it wasn't booting and I had no idea why. Fortunately for my sanity (and luscious hair), the Odroidcommunity came to the rescue. A big thanks to gripped, odroid and joerg for helping me with my Odroid issues.

So based on my experiences, I wrote a full troubleshooting guide for newbies here: Ze complete Odroid troubleshooting guide

If you still can't get your board to work, I'd recommend simply posting your question in the Odroid forum. I'm sure that the fantastic community will be able to clear it upreal quick.

http://forum.odroid.com/viewtopic.php?f=53&t=9829http://forum.odroid.com/


Step 5: This is not the end!What good is having something really cool if you don't get to show off? I'll be posting a guide on how to make a case for your new tablet soon! (I'm toying with thefibreglass & Pepakura method and might switch to 3D printing if it doesn't work)

That brings us to the end of this instructable, I hope you enjoyed reading or making it as much as I did. Thanks for stopping by! And if you have any further questions, I'dbe more than happy to answer it in the comments section below! Seeya!

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Comments

29 comments Add Comment

tgimages says: Mar 12, 2015. 6:49 PM REPLYIs Ubuntu supported on this? I like the concept but want to make my own Ubuntu tablet.

TeddyIndustries says: Mar 13, 2015. 2:58 AM REPLYYes it is! On the site you buy the odroid you can get a SD/eMMC with lubuntu: http://www.hardkernel.com/main/products/prdt_info....

Or you could flash it to an SD yourself: http://com.odroid.com/sigong/nf_file_board/nfile_b...

From there (based on my limited knowledge of linux), you could then simply convert lubuntu to ubuntu with this command: apt-get install ubuntu-desktop

dbess says: Mar 13, 2015. 10:05 AM REPLYLbuntu would be better for that small unit it is a more lightweight Distro

Ugifer says: Mar 12, 2015. 4:53 AM REPLYGreat instructable - I didn't know there were single-board computers like the Pi that ran Android. Looks like you made a great tablet there.

Did you also have to add some hardware buttons? All Android devices that I have seen have at least a home and power button in hardware, plus usually avolume control.

Interested to try this, or something similar.

Ugi.

TeddyIndustries says: Mar 13, 2015. 2:44 AM REPLYI was pleasantly surprised when I did some digging too. Others listed in the chalk elec site are: Beagleboard/Pandaboard/, Beaglebone Black, Hackberry,Cubox, mk802, Gooseberry, Nitrogen/Sabre, OLinuXino-A13/. I chose the Odroid because it had the best specs at the time I made it.

And to answer your question, no I did not have to. Having to add hardware buttons was also one of my primary concerns when planning out this project.If I could direct you to the first picture in this instructable, look at the tablet screen. You should see 7 icons on the black bar (or officially, the action bar) atthe bottom of the screen.

The function of these buttons are, from left to right, are: volume down, volume up, back, home, recent apps, power button, screenshot. These buttonscome natively with the android image provided by Odroid.

Also do note that I haven't quite figured out how to lock my tablet yet. What I normally do now is I set the sleep timer to 15 seconds and disconnect thechalk elec screen from the battery pack. The software then puts itself to sleep.

While I'm talking about this I also do have some issues while running my tablet in portrait mode with the touchscreen. The coordinate data is way off.However, it is totally fine with a mouse.

Hope this helps, and btw, your High-Altitude Balloon Tracker instructable is far out man!

Ugifer says: Mar 13, 2015. 3:36 AM REPLYThanks for the fast reply - I must look into this further! In some ways a hardware power button would be nice but not being essential makes the wholeproject a lot less complex, especially when it comes to casing it up.

Not quite sure how I justify another tablet in our household at the moment, but I expect I can find a reason!

Thanks for a great project

Ugi

PS glad you enjoyed the tracker - it was fun to make and very rewarding to see the pictures.

djskype says: Mar 12, 2015. 11:11 AM REPLYAnyway to get a front facing camera for this? I've been wanting to get tablet with a really good front facing camera and if i build my own camera, maybe icould

TeddyIndustries says: Mar 13, 2015. 2:53 AM REPLYYep! You can get it on the same site as the Odroid! It listed as the USB CAM 720P

http://www.hardkernel.com/main/products/prdt_info.php?g_code=g138745696275

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PJMOR says: Mar 9, 2015. 10:57 PM REPLYGreat idea. What OS is it running?

pucksurfer says: Mar 9, 2015. 4:03 PM REPLYIt looks allot like android kitkat, but I'm pretty sure it's some kind of android

TeddyIndustries says: Mar 10, 2015. 5:20 AM REPLYSpot on! It is running android kitkat, specifically Android 4.4.4. If you buy the SD card or eMMC module from the hardkernel website, it comespreloaded, if not you can simply download the image from the same website.

technosapien says: Mar 16, 2015. 1:44 PM REPLYAny idea if this could be done with a pen-tablet type screen?

asdadeel says: Mar 11, 2015. 5:34 AM REPLYthank you

TeddyIndustries says: Mar 13, 2015. 2:59 AM REPLYYou're very welcome!

asdadeel says: Mar 11, 2015. 5:34 AM REPLYthank you

TeddyIndustries says: Mar 13, 2015. 2:59 AM REPLYYou're very welcome!

uberEpic53 says: Mar 12, 2015. 9:51 AM REPLYAlways wanted to do this with a raspberry pi compute module. After reading the benchmarks, maybe it wouldn't be such a good idea! If they come out with acompute module 2? thin and powerful - and geek points as an added bonus!

TeddyIndustries says: Mar 13, 2015. 2:48 AM REPLYSounds cool to me! Just remember to keep benchmarking to be sure!

rkumgau says: Mar 12, 2015. 6:54 AM REPLYGeekolutes.. Of all the ibles out there, I have never been so impressed and amused (I was laughing very hard).. simply EggSellent one this. Believe it..Ibroke my working tablet to get the touch screen and make this (no it did not work,the screen initially but it did and so kinda very good POC).. I made a boxfor it using light weight wood (nothing speical.. it is almost as good as a photo frame.. just ridiculously thick to look at or carry around and now I amcontemplating using 2 pis instead of one..(don't know for what so don't ask just yet but seems criminal to waste space in that box which has loads of airroom)..

Nevertheless it was a cool experience.

Be careful with the screen.. it is pretty delicate and can go bonkers on you quite quick.

TeddyIndustries says: Mar 13, 2015. 2:46 AM REPLYHaha thank you! And noted!

Mig Welder says: Mar 12, 2015. 6:12 AM REPLYAh but the backstory *is* necessary! It adds depth and interest that many other 'ibles lack. Loving the imagery of an idea gripping the outer fringes of myneocortex.

TeddyIndustries says: Mar 13, 2015. 2:45 AM REPLYThank you! I'll keep that in mind with my future instructables!

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Lennymasterrace says: Mar 12, 2015. 10:28 AM REPLYLots of effort in this intructable

crank_girl says: Mar 11, 2015. 3:20 AM REPLYWhat a great 'ible, I really enjoyed reading it. I'm not sure it's something I would try as the cost is a bit prohibitive but I advice your enterprising spirit! :)

TeddyIndustries says: Mar 11, 2015. 5:30 AM REPLYhey! Thanks for taking the time to read it!

crank_girl says: Mar 11, 2015. 3:21 AM REPLY*Admire! Bloomin' autocorrect!

seamster says: Mar 9, 2015. 9:36 AM REPLYVery interesting project! I really appreciate the effort and passion you poured into this homemade tablet. I hope you share more of your work soon!

TeddyIndustries says: Mar 10, 2015. 5:18 AM REPLYHi! Thanks for the kind comment! Its awesome people like yourself that really make people's days and make the instructables community a really greatone!

seamster says: Mar 10, 2015. 7:30 AM REPLYHey, thank you!

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DIY Tablet Powerful Easy to Make Relatively Cheap

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