gEDA-user: OT: Search for good SMD and IC prober
Dear geda users, I know it is off topic but I guess it is somehow related to PCB and many of you face the same problem or found already a solution. I am looking for a good set of micro probes to address single pins of ICs or other SMD components on a PCB. I saw some kit which looks very promising but a bit pricey [1] however, I'm still unsure about which kind of systems exist and what might be considered as good and what is actually not worse the money. Actually, I am looking for something to contact single legs of SMD-packed ICs for debugging and testing purpose. I tried a very cheap clamps [2], however, they are not really good for my purpose and the clamps are weak and inaccurate. Most probably o.k. for the price but I am looking for something more reliable and precise. I would welcome any suggestions or ideas. Please consider that I have to order them maybe from a vendor with an international delivery service or even better a Japanese branch or reseller. Thanks Torsten [1] http://www.pomonaelectronics.com/pdf/D72902_1_19_06.pdf [2] http://jp.rs-online.com/web/search/searchBrowseAction.html?method=getProductR=0142915 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: OT: Search for good SMD and IC prober
On Feb 5, 2010, at 5:06 AM, Torsten Wagner wrote: I know it is off topic but I guess it is somehow related to PCB and many of you face the same problem or found already a solution. I am looking for a good set of micro probes to address single pins of ICs or other SMD components on a PCB. There's nothing that can compete with #30 wire and a matching soldering iron tip. Even a quick and dirty solder joint is mechanically and electrically better than any practical pressure contact. And with wire, you can make twisted pairs for signal integrity. John Doty Noqsi Aerospace, Ltd. http://www.noqsi.com/ j...@noqsi.com ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
gEDA-user: PCB Solder Tabs
Hi, I would like to make threw hole solder tabs (not holes). The best description of how to do this in PCB was from this email.. http://archives.seul.org/geda/user/Feb-2005/msg00111.html Has the process improved since then? Thanks, Evan ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: OT: Search for good SMD and IC prober
On Feb 5, 2010, at 6:30 AM, John Doty wrote: On Feb 5, 2010, at 5:06 AM, Torsten Wagner wrote: I know it is off topic but I guess it is somehow related to PCB and many of you face the same problem or found already a solution. I am looking for a good set of micro probes to address single pins of ICs or other SMD components on a PCB. There's nothing that can compete with #30 wire and a matching soldering iron tip. Even a quick and dirty solder joint is mechanically and electrically better than any practical pressure contact. And with wire, you can make twisted pairs for signal integrity. strong agreement here! For probing I like using a sharp spring loaded test probe. The spring absorbs your shakes. http://www.pomonaelectronics.com/pdf/d6341-6342-6375_100.pdf But when I need to monitor something more that a quick look, its a a short piece of wire wrap wire soldered onto the part I want to monitor. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: OT: Search for good SMD and IC prober
Dear Torsten, if you don't want to use a soldered wire which is really the best, try the following clips part number 6800 and the set 6800-12 at: http://www.electro-pjp.com/index.php?pagination=1id=62page=3 they looks like a copy of your reference [1]. You will be able to contact pins of SMD package like LQFP64 with a 0.5mm pitch without any problems. Thomas Torsten Wagner schrieb: Dear geda users, I know it is off topic but I guess it is somehow related to PCB and many of you face the same problem or found already a solution. I am looking for a good set of micro probes to address single pins of ICs or other SMD components on a PCB. I saw some kit which looks very promising but a bit pricey [1] however, I'm still unsure about which kind of systems exist and what might be considered as good and what is actually not worse the money. Actually, I am looking for something to contact single legs of SMD-packed ICs for debugging and testing purpose. I tried a very cheap clamps [2], however, they are not really good for my purpose and the clamps are weak and inaccurate. Most probably o.k. for the price but I am looking for something more reliable and precise. I would welcome any suggestions or ideas. Please consider that I have to order them maybe from a vendor with an international delivery service or even better a Japanese branch or reseller. Thanks Torsten [1] http://www.pomonaelectronics.com/pdf/D72902_1_19_06.pdf [2] http://jp.rs-online.com/web/search/searchBrowseAction.html?method=getProductR=0142915 ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: new components
On Tue, 2010-02-02 at 15:55 -0800, Ben Jackson wrote: On Tue, Feb 02, 2010 at 06:11:44PM -0500, resea...@ottomaneng.com wrote: I'm also creating symbols for an FPGA and a DSP which naturally has alot of pins. I've once heard of using multiple files for the symbols so you For a really simple example look at http://ad7gd.net/xc9536/ where I split the power and IO. Very interesting. I am contemplating my first BGA design with gEDA tools (AT91SAM9G45, Atmel ARM9). The part is a 18 x18 =324 ball device with row designators marked as A-V (missing I,O,Q,S,...). The Pin designators are labels K16, R2, G7, .. with the Alpha first, followed with the number. I tried to put in a pin label like this, but encountered problems with the online tool at (http://vivara.net/cgi-bin/djboxsym.cgi). Has anyone been making BGA parts with multiple symbol files? If so, what do I need to look out for as I go down the development path? (Will multiple symbols process as multiple items on the BOM?, Will the netlister correctly pickup the different symbols. Can Alpha-number designators be used at all? Thanks in advance Mike The symbols are also at http://gedasymbols.org/user/ben_jackson/ I could upload an Altera EP2C8 set of symbols if that would help. One symbol per IO bank, power, and config, iirc. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: new components
On Fri, Feb 05, 2010 at 03:33:25PM -0600, Mike Crowe wrote: tools (AT91SAM9G45, Atmel ARM9). The part is a 18 x18 =324 ball device ... Has anyone been making BGA parts with multiple symbol files? I've used PQ208 with one symbol per bank, one for general power (not IO-bank specific) and one for config and strap pins. All you have to do is give them the same refdes and it's all one part as far as the tools are concerned (actually I think you can suffix a lower case letter if you like and it will be ignored, eg U1a, U1b, but I didn't do that). Can Alpha-number designators be used at all? I think so. Like others I wrote my own boxsym program so I don't know if DJ's is trying to enforce numeric pins. Here's an example of a BGA on gedasymbols: http://www.gedasymbols.org/user/darrell_harmon/symbols/xilinx/index.html They have alphanumeric pin names. -- Ben Jackson AD7GD b...@ben.com http://www.ben.com/ ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: new components
Am Freitag 05 Februar 2010 22.33:25 schrieb Mike Crowe: Has anyone been making BGA parts with multiple symbol files? Yes, apparently ;) If so, what do I need to look out for as I go down the development path? Simply use the same designator for all parts, perhaps such with a special number. Will multiple symbols process as multiple items on the BOM?, Will the netlister correctly pickup the different symbols. Can Alpha-number designators be used at all? No problems here, I used a part with about ten symbols, but you have to keep track of the used pins and ref-deses. It is also important, that the splitted symbols have the same set of attributes (at least the footprint and ref-des), strange things can happen otherways. I normaly use a Makefile to generate the symbols out of the ASCII-files. It is relatively straightforward to generate a big list of the pins, describe them and then split this list to the logical symbols. All you have to do then is make. -- mit freundlichem Gruss Christian Riggenbach ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: new components
designators are labels K16, R2, G7, .. with the Alpha first, followed with the number. I tried to put in a pin label like this, but encountered problems with the online tool at Yeah, djboxsym assumes pins are numbered, as it sorts them and checks for missing ones when it dumps the stats at the end. It does allow a trailing letter, but I don't remember why I added that. ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
Re: gEDA-user: OT: Search for good SMD and IC prober
On Fri, Feb 05, 2010 at 09:06:34PM +0900, Torsten Wagner wrote: Dear geda users, I know it is off topic but I guess it is somehow related to PCB and many of you face the same problem or found already a solution. I am looking for a good set of micro probes to address single pins of ICs or other SMD components on a PCB. I saw some kit which looks very promising but a bit pricey [1] however, Down to 0.2mm (8mil pitch)? That's half the smallest pitch I've seen. Can such a pitch be soldered, even with paste printing and reflow? I'm still unsure about which kind of systems exist and what might be considered as good and what is actually not worse the money. Actually, I am looking for something to contact single legs of SMD-packed ICs for debugging and testing purpose. I tried a very cheap clamps [2], however, they are not really good for my purpose and the clamps are weak and inaccurate. Most probably o.k. for the price but I am looking for something more reliable and precise. It also depends on what you want to measure, only a voltage or do you want to look at the signal with a scope, up to which frequency? If it's for debugging, you probably want the connection to be reliable, and in this case nothing beats soldering a wire (the clips of my LeCroy scope work down to 0.5mm pitch, but they are fragile and they easilsy snap off when moving something around). However, at high frequencies, even a fairly short wire can cause significant distortion. For testing/verification after production, when you only need the contact for a short time, you can find very thin tungsten probes that give good contact (either for multimeters or for scopes). Gabriel ___ geda-user mailing list geda-user@moria.seul.org http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
