Wirelessly Powered PiBook
by macakcat, published
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.
Featured article at 3DPrint.com: http://3dprint.com/50569/3d-printed-wireless-computer/
See more of the computer at https://www.youtube.com/watch?v=YlUtDdiExnE
- See the wireless circuit in action at https://www.youtube.com/watch?v=AkXAdmjq4Q4
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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Wirelessly Powered PiBook by macakcat is licensed under the Creative Commons - Attribution - Share Alike license.
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