Lunch Box Computer With Raspberry Pi





Introduction: Lunch Box Computer With Raspberry Pi

About: Question: Who is this D10D3 guy, and what is his deal? Answer: I'm a Maker, a hardware and software hacker, an artist, and general dreamer. I have an insatiable need to build things and modify them. I'm a ...

This is a quick and easy project to build a portable Raspberry Pi computer that fits right in a lunch box. It's a good first Pi project since it requires no coding, soldering or tooling of any kind. All you have to do it acquire the parts, plug everything in and secure it in the lunch box.

The Raspberry Pi isn't a very fast machine, but it IS extremely versatile and easy to use. This rig will have all the functionality of a wifi netbook, if a slow one with a very small screen.

There are lots of ways to do a project like this so feel free to deviate from my plans. All of the parts are modular and you can change its abilities a bit by using different parts.

EDIT: While I used a Raspberry Pi model B in this instructable, I would advise folks to use the Model B+, it uses less power than the Model B which sometimes can't run both the Wifi and Bluetooth dongles.

Step 1: Parts List

Here is the list of parts I used. Please note, these are the first one's I found for each item, if you shop around you can probably pay a bit less. Also, feel free to swap out components, like different size batteries or screen. All of the bits are modular.

Custom Lunchbox $6.50:

10,000 mAh USB Battery $50.00:

Raspberry Pi Model B+ with preloaded SD card OS $35:

Raspbian OS Micro SD Card $12:

Clear Pi Model B case $10:

Composite 5" LCD $26:

AZIO Bluetooth Keyboard $30:

6,800 mAh 12v Rechargable Battery /w charger $20:

1 Micro USB Cable $1:

Edimax Wifi Dongle $10:

If Using Pi Model B: RCA adapter (male to male) $4:

If Using Pi B+:3.5mm to RCS cable $6.30:

Note: The Pi Model B and B+ use different composite video ports. The B uses a traditional RCA jack, and the B+ uses a 4 pole 3.5mm jack that outputs video and stereo sound.

Total Price $200 + shipping with these items.

Step 2: Putting It Together

As for the How-To, it's pretty easy:
1. Charge both batteries, the 12v comes with a charger, the USB charges from any USB chargepoint

2. Put the Pi in it's case

3. Put the Pi's SD card in it, this is your OS and storage

4. Plug the dongles for the Keyboard and wifi into the Pi

5. Use the RCA adapter to plug the screen into the yellow port on the pi

6. Plug the 12v battery into the screen

7. Plug the USB Battery into the Micro USB power jack on the Pi

Once you plug the power into the Pi it will boot up. Check it out, make sure everything works. You might need to configure the wifi dongle or change the screen size. If it defaults to a res that is too high it'll be hard to read the text, so you can always plug an HDMI monitor into it while you configure it. I won't go into the details, there are a TON of easy to follow Raspberry Pi tutorials on the web.

Finally, once you know everything works, use some foam tape to mount everything in the lunch box. I only used tape on the front edge of the keyboard so I could swing it up to turn it on and change it's batteries. Make sure that you arrange things so you have room to get into it to charge stuff later and also make sure there is room to unplug the Pi when you are done using it since the Pi doesn't have an on/off switch.

That should cover it I think. Good luck and have fun with your lunchbox computer!

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139 Discussions

Does anyone have a new screen link which might work in the UK?


11 months ago

Have you swapped out the Pi with a newer one yet?

I plan on making this using a Raspberry Pi 3 and possibly this 5" LCD:

Does anyone have any suggestions on how I can mount a screen like that to the lunchbox itself? Or if there is a case/panel these kinds of screens can fit in so that foam tape can be placed onto the back? This would be my first Pi project

1 reply

Foam tape works in a pinch, or you can screw the hardware to some thin board (ABS, plywood,etc) and glue those to the inside of the lunchbox.

The lcd screen link does not work can you please link me to a working link?

Yes, of course! It will be even better since it has built-in WiFi.

This is all that shows up. Lasts a second and then goes black

1 reply

Sorry I missed this one earlier. If that screen shows up then goes black it means that the screen isn't getting a signal. Make sure you are using the right cable and that your Pi is set to use composite video in the NOOBs configuration file.

Hi! I really want to make this but I don't know much about electronics- I have a few questions - why do you need 2 batteries? Is it essential (meaning do I NEED to order 2? Can I do without?

Thanks in advance!

3 replies

The screen and the Raspberry Pi use different voltages. You can use a single 12v battery, but it's a little more tricky. You'd need to use a voltage regulator to give the Pi something it can use:

Thanks! Also, does it matter whether the 12v battery is Li-ion or Li-po?

Depends on the size of your SDcard, generally 16, 32, or 64gb. You can also add additional storage with USB thumb drives or even stick an SSD in it. Unless you want to store media like movies, you really don't need very much space. The OS is really small, and the remaining space on the SD is usually more than you will need for general computing.

You can browse the web and use google. Raspbian is a full OS, like windows but a bit lighter. It's got all your standard stuff like a web browser and word processor and such.

That doesn't surprise me, this is sort of a guide on how to go about it, but there are numerous parts you could use instead to achieve the same end. I used this part set because I already had all of them lying around my shop.