Wirelessly Powered PiBook

by macakcat, published

Wirelessly Powered PiBook by macakcat Mar 11, 2015
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This is the Wirelessly Powered PiBook running the Raspberry Pi 2 Model B. The tablet charges anywhere on the table which has a power transmitter underneath it. It works similarly to the Wirelessly Powered Tesla Desk Lamp I created previously.
The lower violet LED indicates that it is getting a 6.5MHz signal and the upper violet LED indicates that 5VDC is being supplied.

The PiBook can be constructed without wireless power as well! Wireless power is not critical to it's normal operation/construction.

Designed by David Choi


The print is designed around the Raspberry Pi 2, the 9" Sainsmart touchscreen display, and an Anker 10,000mAh battery (for off the table use). The computer is wireless charged and powered by the table it is sitting on. I created a power transmitter to transmit power to its receiving coils (pics 3, 4, 5). The range is about 7-8 inches from the table where it will receive power.

Needed for construction:
(1) - Raspberry Pi 2 Model B
(1) - Sainsmart 9" touchscreen HDMI display and driver board
(1) - male to male USB cable (1ft is fine - not critical)
(1) - 1/8" stereo audio cable (1ft is fine - not critical)
(1) - male to micro male USB cable (5 inches - critical)
(1) - Ultra Thin HDMI cable (1ft, ultra thin - critical: Paralinx accessories)
(1) - Micro USB male to female OTG cable (6 inch - critical)
(1) - male to female USB extension cable (6 inch - critical, Mediabridge)
(1) - Anker Astro 10,000mAh E3 external battery (critical)
(1) - voltage boost converter (ebay, look for one similar to that I used)
(12) - M3x4.5mm screws
(2) - M2.5x25mm bolts
(2) - M2.5mm nylon lock nuts
(2) - 6mm OD silicone o-rings
(1) - small momentary push button for reset
(1) - 1/8" stereo audio-out jack (Radioshack)

(1) - wireless keyboard with dongle (I used 2.4G Mini Wireless Keyboard)
(1) - Wi-Pi WiFi dongle

The above lists will provide you with a working PiBook without wireless charging.

For wireless charging:
(4) - DPG15I300PA, power switching diodes
(2) - 1N5400 rectifier diodes
(1) - 2200uF, 50V electrolytic capacitor
(2) - SMD LEDs of your color choice (3528 type)
(1) - 1k resistor
(1) - 10k resistor
(1) - 120 resistor
(1) - 5k potentiometer
(1) - LM338 voltage regulator
(1) - 0.1uF ceramic capacitor
(1) - 1uF tantalum capacitor
(1) - 3ft 1/8" copper tubing (sold in auto stores at 6ft)
(1) - 3.3nF, 1000V polypropylene capacitor (for 6.5MHz operation)

Since the transmitter has not changed since the Wirelessly Powered Tesla Desk Lamp, please refer to those instructions for creating a working power transmitter. This is an advanced circuit not for beginners.

The 5" male to micro male USB cable from the battery to the Raspberry Pi is spliced into the 5V regulator charging board in order to allow the Raspberry to work continuously while the battery is charging from the wireless source. I used one 1N5400 diode for this.

Basic circuit knowledge will be needed to construct the voltage regulator.

Please feel free to message me if you need any help constructing this piece. I will do my best to help you out!

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Is there anyway to easily modify this to fit the 7" version of the same touchscreen and without the wireless charging ability? I'm wondering if I could just resize the cutout for the screen while leaving everything else the same? Of all the lcd boxes available, I think your's is the best, even without the wireless charging.

I will make an attempt at modifying it, but I'm not sure if my skill is high enough. It would be great if you could consider making a wireless charging free version for the 7". Thanks for your consideration.

Thanks for liking the enclosure! What are the exact LxWxH dimensions for the 7" screen? I'll make a version you suggested for your specific screen.

Hi David, no apologies needed, your work is beautiful
but what i meant was not smaller but the bigger items divided in two printable parts.
Is that possible, i can glue/click/solder them together afterwords.

Kind regards


Comments deleted.

Hoi David
looks great, does it also works with a Raberry B+?


I'm sorry. I cannot make this smaller because of the electronics :(
If you're interested in the Tesla desk Lamp perhaps, I just released a mini version.
Again, My apologies.


Thanks! I don't have a Raspberry B+ so can't be 100% sure, but the footprint looks the same to me, so it should fit. As far as wirelessly powering it, that should work just fine as well.

Mar 21, 2015 - Modified Mar 29, 2015
yoandwo - in reply to macakcat

Hoi David
it's to big.....
doesn't fit my Ultimaker
so cannot print it :(
max 21 cm
can you make .stl files in which the big panels are divided in half. So one ,stl file for the left part and one .stl for the other half.
I can put them together afterwards