Webpotato

Webpotato
Participants	User:buzz
Skills
Status	Active
Niche
Purpose	Fun
Tool	No
Location
Cost
Tool category

Webpotato

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

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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

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Www

just a dump of links for now ;

pics ;

• https://imgur.com/a/Moe7a1v
• https://imgur.com/a/BVqsr48
• https://imgur.com/a/e9MPFiO
• https://imgur.com/a/tNUDD3W
• https://imgur.com/a/sebfApl

references

• https://imgur.com/a/Tywb9A1
• https://docs.armbian.com/User-Guide_Allwinner_overlays/
• https://www.elektor.nl/2-2-spi-tft-display-module-240x320
• https://github.com/notro/fbtft/wiki
• https://kaspars.net/blog/linux/spi-display-orange-pi-zero
• http://wiki.friendlyarm.com/wiki/index.php/NanoPi_NEO_Core2#Diagram.2C_Layout_and_Dimension
• http://wiki.friendlyarm.com/wiki/images/0/00/Mini_Shield_for_NanoPi_NEO_Core_Core2.pdf
• https://forum.armbian.com/topic/1080-tiny-3-lcd-on-orange-pi/
• https://github.com/nopnop2002/lcd_id

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!