2016年2月16日星期二

Low-cost ARM or MIPS all-in-one computer for office use & home use (design)


Low-cost ARM or MIPS all-in-one computer for office use & home use


This kind computer use public version of the PCB board designing scheme. And the shell use public mold scheme. So can greatly reduce the cost.

More detailed about the main chip (Soc chip) of this kind computer, please visit:
http://jmskl.blogspot.com/2013/12/chipset-for-low-grade-tabletpcset-top.html

CPU: ARM Cortex-A7 1.3Ghz Quad core, Cortex-A9 1.5Ghz Dual core, Cortex-A9 1.5Ghz Single core etc.
RAM: 1GB, 1.5GB or 2GB DDR3 RAM
Storage: 4G eMMC
Built-in WIFI: IEEE802.11 a/b/g/n 150Mbps max. 2.4Ghz & 5Ghz double frequency
Front camera: optional
12 inch LCD screen, LED backlight, 1024x768 resolution
(Also have some other size of LCD screen)

Pre-installed operating system: a Linux release edition (Linux mint, Ubuntu, Debian etc.) & Android (4.4.4 or 5.x or 6.0)
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The back head of the all-in-one computer

Ports in the prominent part of the back head:
Ports in left (or right) of the prominent part of the back head:
Schematic diagrams:
When the computer start up, show a boot menu, user can choose one operating system to enter:

When running Android:

When running Linux:

Another schematic diagram:


2016年2月12日星期五

Design: a 40 inch LCD TVset smart TVset


This is a smart LCD TVset.
This LCD TVset use public version of the PCB board designing scheme. And the shell use public mold scheme. So can greatly reduce the cost.
Low cost, low power waste LCD TVset.

resolution: 1920x1080
Backlight: LED
LCD panel: A+
Visual angle: 178°

Power supply: AC 90~240V 50/60Hz
Speaker: 2 speakers, Power of the speakers: 3Wx2
Accessories: infrared remoter ,pedestal (optional), AC power cord

Buttons in the lower of the frame in right head: Power, VOL+, VOL-, Enter (OK), Exit (Back), Switch

Ports in the prominent part of the back head:
In left head: 2x HDMI1.4 ,2x USB2.0 ,10~100Mbps Ethernet RJ45, SD/MMC card reader, and have these 3.5mm port: YCbCr in, CVBS video in, 2x audio in, audio out, microphone, SPDIF I/O
In the lower of the prominent part of the back head: HDMI1.4 ,VGA, USB3.0

CPU: High performance ARM Dual core, Quad core or multi core CPU
RAM: 1.5GB or 2GB DDR3 RAM
Storage: 4G eMMC
Built-in WIFI: IEEE802.11a/b/g/n 300Mbps max, 2.4Ghz & 5Ghz double frequency

Support decoding these format by hardware:
Video: H.264, VC-1, DivX, Xvid, WMV9, VP8, MPEG2, H.263 (all support max to 1920x1080, except H.263)
Video container: MP4, MKV, WebM, TS (TP), VOB, MPEG (MPG), 3GP, AVI, MOV
Audio: AAC, WMA, AC3, MP3, MPC, OGG, FLAC
Photo: JPEG, GIF, PNG, WebP

Support encoding these format by hardware:
Audio: MP3, OGG, FLAC
Photo: JPEG, GIF, PNG, WebP

Have pre-installed 3 operating system in the eMMC. When user turn on the TVset, can choose which operating system to start.
The 3 operating system are: Media center, Android, a Linux release edition (Ubuntu, Debian, Linux mint etc.)

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About the "Media center" operating system:
The "Media center" is for HDMI, VGA, YCbCr & CVBS video and audio input mode, video and audio playing, view picture, watch IPTV live channel (IP multicast for streaming media) etc.
The "Media center" based on Linux kernel, and the "Media center" is a small operating system, run very fast, more power saving, a simple Media center system, when user use it, it nealy same like a traditional non-smart TVset. Support using infrared remoter to operate it.
When running "Media center", user can press "switch" button to switch many mode, such as: HDMI 1, HDMI 2, HDMI 3, VGA, YCbCr, CVBS, IPTV, Video audio playing and other function mode.

IPTV mode: Support receiving streaming media over IP multicast.
Video audio playing and other function mode: Support playing video and audio, view picture, Text file (*.txt) reader, File manger and other functions.
About the File manger: Can create folder, copy & move file and folder, delete file and folder, rename file and folder, from USB disk, SDcard, intranet sharing file. Support formating USB disk and SD card.

Support USB driver kinds: USB flash disk, USB SDHC card reader, USB hard disk, USB CDROM
Support file system: FAT, FAT32, EXT2/3/4, NTFS (read only), CDFS, UDF

Network functions:
Support both Ethernet and WIFI.
Network connections for Ethernet: PPPOE, DHCP, appoint IP address
Support IP multicast (UDP/IP multicast for live TV channel receiving.)
Support RTSP
File sharing function from intranet.
Not have more advance network functions.

Other functions:
Multi language interface

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When the TVset run media center

the back head of the TVset
Ports in the prominent part of the back head ,In left head

In the lower of the prominent part of the back head:
When user turn on the TVset, can choose which operating system to start.

running Android

running Linux