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misho.petrov
Posts: 48
Joined: Mon Oct 21, 2013 8:52 pm

DUAL power supply box - 01.11.2013 + 4.3" TFT

Wed Oct 30, 2013 1:00 pm

So here is my custom made case for model B.
As you can see, the benefits of this box are:
- every plug is doubled and mounted outside the box to avoid any damage (because of use) of the factory plugs which are difficult to replace;
- DUAL power supply - from the wall mount adapter and by the built-in 6V lead-acid battery;
- The battery serves as a UPS in case of a black-out;
- the built-in battery can power up to 2 external devices without the need for powering up the Pi;
- the whole device is pretty compact and suitable for every kind of application;
- the rubber legs prevent the case from sliding over a flat surface;
- one free Pi USB plug - suitable for WiFi adapter, wireless keyboard and/or mouse, Bluetooth adapter, internal USB storage;
- the Raspberry Pi board is very steady/easy replaceable - nothing is glued to it and the board holds in place by two screws;
- The SD card is protected and with easy access.

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The parts I've used are:
1. White Plastic box
2. 6V 1,2Ah sealed lead-acid battery
3. 5V 1,5A GPS car charger
4. female RCA connector
5. male RCA connector
6. 3,5mm female stereo connector
7. 3,5mm male stereo connector
8. 5,5 mm power plug - x2
9. HDMI M to HDMI F converter
10. Non powered 4 port USB hub
11. mini ON-OFF switch - x2
12. Wall Mount RJ45 plug
13. micro USB cable
14. HAMA 16GB class 10 SD card
15. Old chipset cooler
16. Wall Mount Power Supply 7,5V 1A (enough to power the Pi, all of the peripherial devices and charge the battery)
and of of course the Raspberry Pi itself :)
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Here is the internal schematics:
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Here is a complete gallery.

"To do more" list:
- install a 6"-7" lcd display on the upper side of the box; - DONE
- install a back-stand;
- install a light-guide for the RPi leds on the front side of the box.

The lead-acid battery i fully capable of powering the system for up to:
~180 minutes with only the Pi switched on and network cable plugged in (~380-395 mA);
~140 minutes with the Pi and USB WLAN adapter (~460-480 mA)
~80 minutes with the Pi, USB WLAN adapter, 4,3" car lcd (LS-430a) (~900-940 mA)
~70 minutes with the above mentioned plus USB keyboard, optical USB mouse and USB flash drive (~980-1030 mA).

Your applause 8-)

Here is the update as promised:

1. The TFT screen
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As you can see, I have moved the back-screen keys for the screen menu to the front side of the case for easy access.

2. A side (height) view with the screen:
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3. The new circuit:
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4. To answer a possible question, that I have been asked myself before the upgrade - YES the composite output CAN provide powerfull enough signal to duplicate the output - on the internal display and on a TV.
Last edited by misho.petrov on Sat Nov 02, 2013 8:26 pm, edited 8 times in total.
1. RPi B 512 MB + Sandisk 2GB c4, vesa mount;
2. RPi B 512 MB + Hama 16GB c10, heat sinks, micro fan, built-in lead-acid battery, duplicated factory plugs, 4,3" TFT, usb mini wireless keyboard, TDA2822 and speakers;
3. RPi 2 + Maxell 16GB c10.

dan3008
Posts: 1172
Joined: Wed Aug 15, 2012 1:05 pm

Re: DUAL power supply box

Wed Oct 30, 2013 1:21 pm

Very nice. You could sell them at a profit if there's a quick and easy way to build them :)

So its portable too

I like it
dan3008 wrote:Pays your money, takes your choice

User avatar
Mikumiku747
Posts: 17
Joined: Fri Nov 01, 2013 10:54 am
Location: Sydney Australia

Re: DUAL power supply box

Sat Nov 02, 2013 5:20 am

This case is pretty awesome, I was hoping to make a similar one myself (thanks for the help with that :D), and I wanted to know how you fit the Micro B USB plug on the edge there? Did you butcher up a cable or what? I too want to make the SD card accessible, but I can't because the power plug is too long. Awesome case, can't wait to see that screen you mentioned.

Mikumiku747
Thanks,
Mikumiku747 :)


Have a look at my portable pi:
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=59903&p=447601#p447601

mrhobbeys
Posts: 80
Joined: Wed Jul 18, 2012 2:53 am

Re: DUAL power supply box - 01.11.2013 + 4.3" TFT

Sun Nov 03, 2013 6:15 pm

This is great! I now really want to incorporate your power supply and backup battery (or just battery) into my stuff. Thanks for posting.
www.betterpchealth.com
www.hektechnologies.com

User avatar
Mikumiku747
Posts: 17
Joined: Fri Nov 01, 2013 10:54 am
Location: Sydney Australia

Re: DUAL power supply box - 01.11.2013 + 4.3" TFT

Mon Nov 04, 2013 10:16 am

It would be awesome if you could make a video about this, showing off the features, the device in use, and any other noteworthy things (like what you personally use it for. An outside connection to the GPIO ports would be pretty cool too. Is the TFT you're using this one:
https://www.adafruit.com/products/946
I am getting that one shipped to me and would like to know how it goes. And you mentioned buttons on the back. What do they do, and is it OK to leave them covered? You can reply on my post if you want. It's here:
http://www.raspberrypi.org/phpBB3/viewt ... 40&t=59903
Thanks,
Mikumiku747 :)


Have a look at my portable pi:
http://www.raspberrypi.org/phpBB3/viewtopic.php?f=40&t=59903&p=447601#p447601

User avatar
misho.petrov
Posts: 48
Joined: Mon Oct 21, 2013 8:52 pm

Re: DUAL power supply box - 01.11.2013 + 4.3" TFT

Mon Nov 04, 2013 11:15 am

Q:
An outside connection to the GPIO ports would be pretty cool too
A: It is not really in the plans for this project. But eventually I'm going to use 5 more outside buttons connected to 5 GPIO pins for Start/Stop video recording, Increase/Decrease v4l driver white balance (usb camera) and shutdown script launcher.

Q:
what you personally use it for
A: Nothing serious at the moment. Just for watching videos, downloading *tube videos, ftp, game console.

Q:
buttons on the back. What do they do,
A:
There's three little buttons in the back that let you enter a menu system for adjusting brightness, color and contrast. (your link)
Q:
make a video about this, showing off the features,
A: When I have a little spare time ;) ...
(about the TFT) Resolution: 480 x RGB x 272
Not true. Mine is almost the same and is fully capable of showing a full HD resolution. Although the symbols and the letters are very very tiny :)... I have set mine to 854x480 - almost 16:9 ratio, and increased the console font to 18x32. It suits me well.
p.s. Mine is twice as cheaper - LINK
1. RPi B 512 MB + Sandisk 2GB c4, vesa mount;
2. RPi B 512 MB + Hama 16GB c10, heat sinks, micro fan, built-in lead-acid battery, duplicated factory plugs, 4,3" TFT, usb mini wireless keyboard, TDA2822 and speakers;
3. RPi 2 + Maxell 16GB c10.

chubsky
Posts: 26
Joined: Wed May 22, 2013 2:01 am
Location: La Grange , Wyoming, U.S.A

Re: DUAL power supply box - 01.11.2013 + 4.3" TFT

Thu Nov 14, 2013 12:36 am

How does it do on temperature? I noticed that there aren't any vents and wondered.

User avatar
misho.petrov
Posts: 48
Joined: Mon Oct 21, 2013 8:52 pm

Re: DUAL power supply box - 01.11.2013 + 4.3" TFT

Thu Nov 14, 2013 9:21 am

The CPU temperature highly depends on the ambient temperature. Usually after boot, the temperature is around 44-46C at about 28-32C room temperature. During a heavy CPU task like playing/copy;move/downloading a large file/video playing the temperature is rising to no more than 52-54C at the same ambient conditions.
1. RPi B 512 MB + Sandisk 2GB c4, vesa mount;
2. RPi B 512 MB + Hama 16GB c10, heat sinks, micro fan, built-in lead-acid battery, duplicated factory plugs, 4,3" TFT, usb mini wireless keyboard, TDA2822 and speakers;
3. RPi 2 + Maxell 16GB c10.

User avatar
misho.petrov
Posts: 48
Joined: Mon Oct 21, 2013 8:52 pm

Re: DUAL power supply box - 01.11.2013 + 4.3" TFT

Fri Aug 29, 2014 3:25 pm

Video presentation as promised ;)
1. RPi B 512 MB + Sandisk 2GB c4, vesa mount;
2. RPi B 512 MB + Hama 16GB c10, heat sinks, micro fan, built-in lead-acid battery, duplicated factory plugs, 4,3" TFT, usb mini wireless keyboard, TDA2822 and speakers;
3. RPi 2 + Maxell 16GB c10.

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