Webpotato

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Portable thingy
Webpotato.jpg
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Portable thingy

Webpotato.jpg {{#if:No | [[Tool Owner::{{{ProjectParticipants}}} | }} {{#if:No | [[Tool Cost::{{{Cost}}} | }}


What

I wanted to build a portable linux computer for fun.

Items used :

SBC

Nanopi Neo Core2

Quadcore A53 1.5ghz, 1GB DDR3, 8GB eMMC

http://www.friendlyarm.com/index.php?route=product/product&path=69&product_id=211

Screen

2.2" 240x320 SPI ILI9341

Bridge 'J1' on the back of the screen, this is needed to power the LCD from 3.3V.

All connections on 'GPIO1' header of the SBC

Pin on SBC Name on SBC Name on TFT
1 SYS_3.3V VCC
20 GND GND
11 GPIO0 Reset
13 GPIO2 LED (backlight)
15 GPIO3 D/C
19 SPI0_MOSI MOSI
21 SPI0_MISO MISO
23 SPI0_CLK CLK
24 SPI0_CS CS

config something like this ;

sudo modprobe fbtft_device custom name=fb_ili9341 gpios=dc:3,led:2,reset:0 speed=32000000 fps=30 busnum=0 rotate=270

USB Wifi

Edimax EW-7611ULB

WiFi 802.11bgn & BT 3.0

https://www.edimax.com/edimax/merchandise/merchandise_detail/data/edimax/global/wireless_adapters_n150/ew-7611ulb/

All connections on 'GPIO3' header of the SBC

Pin on SBC Name on SBC Name on UBS port?
17 VDD_5V +5V
11 GND GND
13 USB-DP3 D+
15 USB-DM3 D-

Mainline kernel driver is x86 only , ARM-capable driver here;

https://github.com/lwfinger/rtl8723bu

PSU

MT3608 module

2A , hopefully

Charger

Nameless ebay module

1A , supposedly

Battery

Samsung INR18650-35E 3450mAh

https://eu.nkon.nl/rechargeable/18650-size/samsung-inr18650-35e.html

Audio

Descoped for now

Wuuuu

Www

just a dump of links for now ;

pics ;

references

Wishlist

For next version, a list of improvements;

  • Powerled, atm its nearly impossible to see if its on (unless the screen turned on, quite late in boot)
  • Powerswitch , atm i just remove battery
  • External access to uart0 , for debugging
  • Internal powerbus , need less powerwires going all over the place , this might save ~10 wires internally.
  • More internal space in case , i didnt really account for wires taking this much space.
  • Access to SD card
  • Camera!
  • Sound!
 
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