ARM9 Board Taking shape -2:Active parts

See the power IC how small it is ,

I will have to make a HOT AIR PENCIL.
There are 20+ web sites detailing it but I will use my way to do that.. Done the
shopping by now.

I will create a post on the same soon.

Where is Web-o-pedia popular

As per Sitemeter tool.
Web-o-pedia is gaining visitors mainly from USA and INDIA !
Glad to know that.

LED desktop thingy!

I bought a china made LED torch cum table lamp. Costed very less.
Charges well gives 8Hour backup minimum(did not check when it goes off) from a 6hour charge

What is special here is it is a torch with a flip 6ultrabright LED panel.The panel tilts at 15degrees , so you can point the LED sets all directions... that is too much the price of 1 cup coffee in some places .Panel can be hidden when used as torch.
But there is a problem!

The table light /torch loses the intensity after 3hours to 60%.
There must be a way to keep intensity same. I needed a constant current source at least 0.5A.


I searched on net and got (LED driver) : http://www.candlepowerforums.com/vb/showthread.php?t=236260
image:
And I know about joule thief circuit ->simple 1 or 2 transistor circuit increases the voltage.
Here is joule thief:

(i assume battery is 6v )
Plan is :
battery(6v)>joule thief(9v)>LED driver>LEDs

smooth white light till battery loses the charge (if backup become 6Hrs , fine na!)

Arm9 board free samples locked up

I am asking free samples from a company , for atleast the power section
some one named Srikanth G. from their local office ,locking the samples and asking
business details again and again . Samples save good $$$.

If not i have 10 other alternatives. Letz see what comes out .

Board is in progress , 90% of components supply i sorted out.
The At01 series has inbuilt loader that will init the chip and peripherials.
Now i need to learn the 1st time flashing of the Uboot loader. SD RAM I got : see it on the board before soldering



Update: sample will be most probably be released , as i convinced them . Local center guy i forced putting mail to HO. hahaha :).

One problem is there: The SDRAM pads are too small ,go under the chip legs.manual soldering will be tricky.
UPDATE: IC Pack and samples have arrived , flash,eeprom,power sections things came .
from usa, mainchip and ethernet chip has to come from Taiwan and Hong Kong.
Look at the Flash IC box , well packed in antistatic box filled with sponge.

ARM9 BOARD TAKING SHAPE-2 :passives

This is phase 1:

I am at my office where i work as consultant ..whoa !today passive components have arrived.Means the resistor and capacitors 0402size.
The size presented a hurdle, 0603 components are pretty easy to get .

But finally i got hold of the components. more are there in my tray shelf .
I got passive s for 10 boards for trial build we will take chips 1 pc each . Let the prototype be ready as well toolset .. then may go bulk.


phases of build :

Phase 1: Passives arrives + jacks etc {done}
Phase 2: Active cmp arrives mainly At91rm9200
Phase 3: Solder and test

ARM9Board ...taking shape 1

The ARM9 board taking shape , at office I got a delivery of 20 PCBS recently... well built FR4 laminate .Green masking applied on both sides , Silver coated pads and vias .

Thanks to my contacts in product industry ..
However the sourcing of the chips is still critical .I am working on it
So far i have been in touch with many middleman
Letz wait and see...

My ARM9 Development board for indian developers

The Low Cost ARM9 board is here .


I always wanted to bring a low cost solution for indian developers .
A highly capable ARM9 board that can run embedded realtime linux .
with ample amount of memory and provision for future expansion.

Now! Why to pay 40 k for an ARM lab setup with JTAG and all ...my design is just <6K Rs.

The design criteria is fulfilled with AT91RM series ARM9
chip based design . Added 256MB sdRAM,64MB flash,24LC512 eeprom,
can, JTAG , USB serial interface( for laptops this is handy as there is no serial port ), CAN bus transiever, controller . It has a USB host too! there are more interfaces can be added .



There are many online ported versions of linux for the chips as well as develeoper forums /Groups .


Designed during off time and now almost ready :
See the snaps of it :






After working 4 years in embedded product domain , i felt the need of hardware test setup for learning board level porting, device drivers BSP development.
As well as a board that is suitable for my Oscilloscope needs.In the company where I work as consultant need for linux low cost setup was apparent, i got approval to initiate the project for internal usage . Company is willing to go open source for the design, time to materialize the concept!


Possible uses :
> It is full linux development lab ,you can test the device drivers ,Realtime programming, hardware interface,data acquisition, audio interface ...what ever you can imagine.

>a full featured oscilloscope , there are card designs freely available
on net for the input section , write the code + add a graphic LCD .. this is
your storege oscilloscope ... do all the tests you like E.g . View Pulse shape,


>Industrial acquisition system ,security system , embedded webserver,
CNC controller ... remote controller ,touch screen kiosk.
>Torrent downloader with open Wrt ported

There is linux OS on the board so you program as you like . The PCBs will be coming soon . Will update here.