LPC134x protoboard

[lpcware]

Content originally posted in LPCWare by Luis Digital on Thu Jun 09 14:29:52 MST 2011
Hi!

Our new board is almost ready!
This includes a three-axis analog accelerometer, as an option.

Will be sent to the factory within hours.

Comments, opinions, complaints?:)

Thank you.
[IMG]http://luisdigital.com/varios/lpc134x_protoboard.png[/IMG]

[lpcware]

Content originally posted in LPCWare by NXP_Europe on Sat Jul 23 09:29:59 MST 2011
Hello Luis,

I suppose you already knew, for additional PCB recommendations see the following links:

http://ics.nxp.com/support/documents/microcontrollers/zip/an10974.zip
http://ics.nxp.com/support/documents/microcontrollers/zip/an11031.zip

Every analog design has specific characteristics. Noise factors, sometime can not be predicted. By testing, like you do, the quality of the design can be quantified. Your result seems to be very good!

[lpcware]

Content originally posted in LPCWare by Luis Digital on Fri Jul 22 21:26:49 MST 2011
I performed ... yesterday (because it's already 12:20 AM :-)), analysis for my last prototype, and everything was fine.

[IMG]http://www.luisdigital.com/proyectos/mouse_usb_acelerometro/LPC1342_ADC_analysis01.png[/IMG]

The biggest change was to isolate the crystal away from the ground, and add a capacitor to the power supply.

[lpcware]

Content originally posted in LPCWare by Luis Digital on Sat Jul 02 15:14:44 MST 2011
Hi,

My new board is here, and I am pleased with the result: everything went very well!

Have a great weekend and Monday holiday, for those living in the USA.

[lpcware]

Content originally posted in LPCWare by Luis Digital on Fri Jun 10 06:44:14 MST 2011

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Quote: Polux rsv
Hi,
Just my 2 cents:
-Use 4 fixing holes, one in each corner.
-Enlarge the isolation distance between copper and fixing hole. This will allow metallic screw. use.
- Is a "FTDI serial cable" connector implemented ? Easier for programming. 

Angelo

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- Already space becomes limited and do not want to compress more.

- The holes are not connected, but I think it is better that the screws are in contact with the ground. If you do not wish to make contact, use a piece of paper / plastic.

- I do not know what the craze with this chip. It costs almost $5. It is very good yes, but I use one for all: program different microcontrollers, connect GPS, telephone module, etc.

In addition, you can get a converter on eBay for $3, includes a long cable.

And finally, the LPC134x can be programmed using the USB port.

Just my 1/2 cent.:)

[lpcware]

Content originally posted in LPCWare by Luis Digital on Fri Jun 10 06:18:51 MST 2011

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Quote: bobi-one
BTW, why everyone use DIP quartzes,are they better than the SMD type ?
(because i think they add too much volume to the board :))

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* More abundant / common.
* Cheaper.
* Can be used [I]through[/I]-[I]hole[/I] (prototypes, rapid testing).
* In my personal case: I have a full rail.:)

For the LAN I have a rail SMD, so there'll be pleased.

[lpcware]

Content originally posted in LPCWare by bobi-one on Fri Jun 10 02:41:18 MST 2011
BTW, why everyone use DIP quartzes,are they better than the SMD type ?[IMG]http://best-b2b.com/userimg/545/558-1/smd-quartz-crystal-374.jpg[/IMG]
(because i think they add too much volume to the board :))

[lpcware]

Content originally posted in LPCWare by Polux rsv on Fri Jun 10 02:07:33 MST 2011
Hi,
Just my 2 cents:
-Use 4 fixing holes, one in each corner.
-Enlarge the isolation distance between copper and fixing hole. This will allow metallic screw. use.
- Is a "FTDI serial cable" connector implemented ? Easier for programming. 

Angelo