hybridfree/eevblog-posts huggingface dataset:
ULN2003 driver board mod - Page 1
Forum section: electronics / general

author: ValkyrieAutomotive
author_rank: Newbie
timestamp: March 17, 2015, 09:21:08 am
content: Hey everyone, you know those ultra cheap ULN2003 boards with the ULN2003APG chip on them? im wantint to make them even smaller by getting rid of the LED's and resistors, but ive noticed what looks like a cap bridging positive and negative inputs, does anyone know if its really required? or what it actually is, most layouts ive found don't shed any light on it

author: cowana
author_rank: Frequent Contributor
timestamp: March 17, 2015, 09:56:59 am
content: Search for 'decoupling capacitor' - it's used to remove electrical noise from the supply and ensure reliable operation of the device.It's recommended to have one capacitor per IC (minimum), mounted physically close to the device.

author: nctnico
author_rank: Super Contributor
timestamp: March 17, 2015, 11:42:10 am
content: You can remove the capacitor as well. The ULN2003 is a transistor array.

author: digsys
author_rank: Unknown
timestamp: March 17, 2015, 12:41:48 pm
content: Why not look for a surface mount version .. it's even smaller !!

author: Pack34
author_rank: Frequent Contributor
timestamp: March 22, 2015, 12:49:26 pm
content: It would be hard to get much smaller than this.http://www.superdroidrobots.com/shop/item.aspx/7-channel-high-current-ttl-driver-smd/1724/

author: BlueBill
author_rank: Regular Contributor
timestamp: March 27, 2015, 03:20:15 pm
content: Why not just use the IC itself. No need for a breakout PCB if using the DIP package.
Gerber or ODB++ to Solidworks - Page 1
Forum section: electronics / general

author: free_electron
author_rank: Super Contributor
timestamp: March 25, 2015, 05:32:46 pm
content: I am trying to find a way to load gerber or ODB data into solidworks in an easy way. it is the copper features i am after. load traces and polygons, give them thickness just like in the real board.

author: Neilm
author_rank: Super Contributor
timestamp: March 25, 2015, 07:20:28 pm
content: There is an add on called Circuitworks. It allows you to export the data from your PCB package and pull it into Solidworks. If necesssary, you can pull everything down to the vias - useful if you are doing thermal analysis of your PCB.

author: free_electron
author_rank: Super Contributor
timestamp: March 25, 2015, 07:46:43 pm
content: that is indeed the goal. i have circuitworks. but it cannot read odb++ nor gerber.

author: Christopher
author_rank: Frequent Contributor
timestamp: March 25, 2015, 08:10:18 pm
content: Software Companions offer a 30 day trial on their cheap software ($100 iirc) which can convert gerbers to multiple formats. THeir site seems to be down at the moment.I have used this software before and it's the one bit of software I was glad to pay for as it dug me out of a massive hole. Convert raw gerbers to DXF then Extrude in solidworks. Done.http://www.softwarecompanions.com/vcpro.html

author: Neilm
author_rank: Super Contributor
timestamp: March 25, 2015, 09:46:38 pm
content: Quote from: free_electron on March 25, 2015, 07:46:43 pmIf I recall what they do at work, they don't read the odb++ file directly. They export the data from Allegro to another format that Circuitworks reads in - from memory it was .edf

author: free_electron
author_rank: Super Contributor
timestamp: March 25, 2015, 10:49:36 pm
content: I do not want to go through dxf. That was the while point of this question. I avoid dxf as the plague. The format is crap. Traces are exported as zero width so all geometry including endcaps is lost.Plus i need to export every layer individually and that is too much work.Idf is a possibility. BUt only version 4 supports copper geometry . Altium can only export v 3...I found a workaround using Sherlock. Altium save odb++ ,which we do anyway so no additional work.Suck in odb in Sherlock. Spit out step. Suck in step in Solidworks enterprise or in Catia.Sherlock is a failure analysis program for PCB.
How to manually add items to the BoM - Page 1
Forum section: electronics / general

author: Digibin
author_rank: Regular Contributor
timestamp: March 17, 2015, 08:22:13 pm
content: Hey, I've started using DesignSpark PCB and I was wondering if there's a way to add miscellaneous items to a project BoM. For example a board to board cable assembly that doesn't appear on the schematic itself? Or a component that RS don't stock?Can it be done? If so, how?Cheers.

author: DerekG
author_rank: Frequent Contributor
timestamp: March 17, 2015, 09:19:31 pm
content: I can't answer your question above as I spent a month with DesignSpark last year before moving to an alternative package.If the components you want to use are DesignSpark supported on the element 14 website, everything runs very easily.However, when you need to make your own components, you will pull your hair out & wish you looked at alternative packages.I use extensively Altium, Proteus & DipTrace (different companies I contract to have their preferences) & I found the component generation side of DesignSpark absolutely woeful.
STM32F100 PCB Design - Page 1
Forum section: electronics / general

author: orionsbelt
author_rank: Newbie
timestamp: March 13, 2015, 08:33:05 am
content: Hello,I am planning to design a PCB for a STM32F100 microcontroller. Anybody with such experience can tell me what I need to think about when designing it? I found a blog (http://singnalgenerator.blogspot.de/) where an image of a schematics of STM3F100 is uploaded for pcb designing. Now, it is stated that this schematics is a standard solution for this processor. I am uploading a picture of the schematics.I would appreciate your help.RegardsOB

author: hommer.z
author_rank: Newbie
timestamp: March 17, 2015, 07:31:41 am
content: hello,sirI was doing a sales of Shijiazhuang PCB board, see your article I feel very fortunate, pcb design happens to be to our advantage,I'll see your photo technology, and give you the most sincere service.next it's our company's web site:www.ourpcbte.com. I hope I can help you in the latterBest regardse-mail:sales2@ourpcbte.com

author: FreddyVictor
author_rank: Regular Contributor
timestamp: March 17, 2015, 02:58:56 pm
content: you could take a look at the ST Nucleodev board(F103RB) - in theuser manual, there is the schematic for itif you just want a dev board then these boards are v cheap !
Create Altium PrjPcb from Gerbers? - Page 1
Forum section: electronics / general

author: The_PCB_Guy
author_rank: Regular Contributor
timestamp: February 28, 2015, 01:33:01 am
content: Hi all, I'm going out on a limb here...I had a PCB design created in Altium Designer AD15 on another computer. I exported the gerbers and sent them to my other computer over email so that I could upload them to the manufacturer's site from there. However, now that I don't have access to the first computer, I noticed some issues with the board that I need to fix before sending them out. I highly doubt this is possible, but is there any way to import the gerbers into Altium on my other computer and convert to a PrjPcb file? I realize the gerbers only contain layer data and really no electrical data, but I was wondering if there are any really clever people out there who would be able to tell me how to do this without having to completely recreate my board?I'm thinking I'll probably just have to wait until I can have access to the first computer again.Thanks,Matt

author: T3sl4co1l
author_rank: Super Contributor
timestamp: February 28, 2015, 03:19:46 am
content: You can import gerbers as primitives (lines, arcs, etc.) but good luck reconstituting the electrical information.Tim

author: free_electron
author_rank: Super Contributor
timestamp: March 09, 2015, 12:13:46 am
content: yes it can be doneopen a camtastic project in altium. import directory with gerber and drillassign layers in camtasticrun the netlist generator in camtasticfrom camtastic export to pcb.done.

author: The_PCB_Guy
author_rank: Regular Contributor
timestamp: March 15, 2015, 10:23:36 pm
content: Thanks very much guys! I ended up just waiting and I packaged the project on my other computer and put it on a flash drive. It's definitely good to know it's possible though!
Optical design cad ? - Page 1
Forum section: electronics / general

author: free_electron
author_rank: Super Contributor
timestamp: March 29, 2015, 03:02:21 am
content: I am looking for software to help me simulate optics.basically : i have an RGB led , i want to shine this on a convex or concave material , set the translucency of that surface ( the material index ) and see how the light comes out the other end.,the problem i am trying to solve is the following : i make a square box , 2 inch by 2 inch by 2 inch. ( or 5cm by 5 by 5. ) this box is made from milky ( diffused) plastic.at the bottom of the box, in the centre of the bottom surface, i have a single led with a 120 degree light beam.i want to stick a semi transparent convex or concave mirror inside the box to project part of the upward shining light onto the sides of the cube.so i want the led at the bottom to illuminate both the top and the four sides ( the bottom can stay dark )i should be able to warp the mirror and set different material 'indexes' and see how what the light pattern looks like on the sides.the idea is to illuminate the each of the five side of the cube uniformly from this single point source.i have a design here where they did this for a lightbulb. they have led's ont he bottom shining upward into a convex semi-transparant 'lens' the net effect is a uniform lightfield all around just like with a regular lightbulb.anyone know of a piece of software where oyu can just muck about a bit drawing some simple 3d shapes and send light throught them ?

author: helius
author_rank: Super Contributor
timestamp: March 29, 2015, 03:21:40 am
content: Not "simple", but:http://www.jcmwave.comThis is simple, but doesn't handle multiple elements:https://www.lhup.edu/~dsimanek/scenario/raytrace.htmIn general, any raytracing program is able to simulate lenses. The shapes are normally modeled in a 3d modeling application, but some have built-in raytracing. They aren't designed for optical engineering, so they (mostly) don't handle dispersion, diffraction, chromatic aberration...

author: Lightages
author_rank: Unknown
timestamp: March 29, 2015, 05:03:32 am
content: again not simple:http://www.winlens.de/index.php?id=5

author: miguelvp
author_rank: Super Contributor
timestamp: March 29, 2015, 08:17:57 am
content: Another one not simple either, I did play with it over 2 years ago and I don't remember the capabilities.OSLOhttp://www.sinopt.com/
XL Designer?? - Page 1
Forum section: electronics / general

author: Christopher
author_rank: Frequent Contributor
timestamp: March 06, 2015, 05:22:41 pm
content: Has anyone used this software? If so, can you tell me how to manually route traces?I have a few example old designs from an old employer I am just looking through & I can ripup traces but I can't for the life of me figure out how to manually route a trace!The manual isn't very informative...

author: Wilksey
author_rank: Super Contributor
timestamp: March 09, 2015, 10:52:06 pm
content: Eugh.Amend -> Enter TracksI've used it now and again unfortunately.
ZenitPCB - Page 1
Forum section: electronics / general

author: Warhawk
author_rank: Frequent Contributor
timestamp: March 09, 2015, 01:04:05 pm
content: Hi, I am wondering if anyone tried ZenitPCB ?It seems to be a nice free software but there is not a much information on the Internet though. Is it comparable for example with Diptrace ?
Migrating from Orcad Layout to Orcad PCB Editor? - Page 1
Forum section: electronics / general

author: nctnico
author_rank: Super Contributor
timestamp: February 18, 2015, 02:16:27 pm
content: I'm wondering what the opinions are on migrating from Orcad Layout to Orcad PCB Editor. I know these are completely different packages so I'm wondering how painless it is to migrate existing designs and footprints from Layout to PCB Editor. Also: how steep is the learning curve on PCB Editor coming from Layout?

author: AndyC_772
author_rank: Super Contributor
timestamp: February 18, 2015, 02:40:37 pm
content: If you mean Orcad PCB Designer, which is a cut-down version of Allegro, then I'd describe the learning curve as being a brick wall - but one well worth climbing.It took me a solid week to learn my way around it and go from "wow, that's a lot of icons" to being productive. Now I've done so, though, I'm pretty comfortable using it, and I may never need to learn a PCB package ever again. I hear version 17 is due soon, which will include more of the grown-up features in the less costly variants.I never used the old Layout software, so can't advise on the differences, sorry.

author: Neilm
author_rank: Super Contributor
timestamp: February 18, 2015, 07:18:23 pm
content: I used the free version of Layout (mostly as a viewer) and I found it a pain. I now have Allegro which I find much easier to use after a couple of days training. Biggest issue I have is that you have to ensure which mode you are in. Layout you could select a component and it grabs the component, Allegro you have to make sure you are selecting the correct thing (component, pin, text etc)

author: nctnico
author_rank: Super Contributor
timestamp: February 20, 2015, 01:12:53 am
content: So it seems migrating is going to take quite some effort in learning a new tool.
Should there be more child boards? - Page 1
Forum section: electronics / general

author: FivePoint0
author_rank: Contributor
timestamp: February 18, 2015, 09:32:18 pm
content: Should we include more child boards here?Mentor Graphics?Easy PC?etc, etcBecause I have some good things to say about names not there!

author: zapta
author_rank: Super Contributor
timestamp: February 19, 2015, 04:52:40 am
content: You can post it in the general parent forum.https://www.eevblog.com/forum/eda/?action=post
Eagle error when opening schematic - Page 1
Forum section: electronics / general

author: trevorford
author_rank: Contributor
timestamp: February 15, 2015, 07:16:33 pm
content: Hi guys,Sorry if this is in the wrong category its my first time here,I was hoping to get some help on an error I'm getting from eagle. I design a schematic then save it and when i go to re-open in i get the same error over and over again:Loading C:/Users/Trevor/Desktop/Ford-Duino.sch . . .Error:line 131, column 23: Unexpected ' ' .I've searched online but haven't found anything useful. Does anyone know whats going on?Thanks,Trevor
Migrate eagle librarys to Design spark - Page 1
Forum section: electronics / general

author: geggi1
author_rank: Frequent Contributor
timestamp: February 14, 2015, 12:47:54 pm
content: Is there a simple way of migrating a component library from eagle to design spark?Eagle is a very nice program but the free version got a few drawback i don't like1. the maximum size limitation of 80x100 mm.2. the non commercial licence for the free version.3. the price for a commercial version.I'm planning to build some smaller projects that might become something I will sell in the future and I don't want to have problems with cadsoft.
iteadstudio - how to submit files? - Page 1
Forum section: electronics / general

author: Sailor
author_rank: Regular Contributor
timestamp: February 06, 2015, 11:18:03 am
content: I must be going blind in my old age - I don't see how to submit design files on the web site. Also what format will they accept? Pcbcart just take my Protel .PCB file and work their magic. What/how do itead want it?Thanks,

author: deephaven
author_rank: Frequent Contributor
timestamp: February 06, 2015, 11:24:52 am
content: Order something from this pagehttp://imall.iteadstudio.com/open-pcb/pcb-prototyping.htmlAfter you have have hit the Add to Cart button, all the info will be on that page.

author: Sailor
author_rank: Regular Contributor
timestamp: February 06, 2015, 11:43:12 am
content: ahhh, Ok, thanks, I'll have a look.

author: donotdespisethesnake
author_rank: Super Contributor
timestamp: February 08, 2015, 07:54:07 am
content: I send them Gerbers zipped up, no problems so far. There is a button to upload files in the Account status after you have made payment.One tip, if you are ordering 2 sets of boards of same type, add two separate orders, don't put quantity = 2. You can only upload one file per line item.

author: iampoor
author_rank: Frequent Contributor
timestamp: February 12, 2015, 04:43:00 pm
content: Quote from: donotdespisethesnake on February 08, 2015, 07:54:07 amThen actually just changed that. You can now order as many of the same "type" as you want, and split it up when your uploading gerbers.
Cheapest 4mil/4mil board house for prototypes - Page 1
Forum section: electronics / general

author: jeremy
author_rank: Super Contributor
timestamp: January 08, 2015, 11:46:56 am
content: Hi all,After having being spoiled by the likes of elecrow and seeedstudio with their pricing, I'm looking for a 4mil/4mil board house to get some prototypes done. It's only for small boards (5mm x 5mm), 2 layers and I need less than 5 units. PCBCart is quoting me $150 incl setup for 1 board, am I going to do any better than this? This is without laser vias too.Damn ultra fine components....

author: IconicPCB
author_rank: Super Contributor
timestamp: January 08, 2015, 10:19:49 pm
content: Jeremy,Send me Your Gerbers ( or protel/eagle ) files for a competitive Australian made offering.

author: jeremy
author_rank: Super Contributor
timestamp: February 05, 2015, 08:27:07 am
content: Hi blueskull,Do you have any suggestions? The only places I have been able to find start at $150. I've redone the board with no vias at all but I still can't get it cheaper.Also, I realised in my original post that I wrote 5mm x 5mm. It is actually 5cm x 5cm

author: Ribster
author_rank: Frequent Contributor
timestamp: February 05, 2015, 08:33:47 am
content: Quote from: blueskull on February 05, 2015, 07:46:54 amOSHpark specs:All 2 boards are FR4 170Tg/290Td which are suitable for lead-free processes and temperature.4 Layer boards are now FR408 (180Tg). Seethe support site for the stackup.They have ENIG (gold) finish for superior solderability and environmental resistance.They’re 1.6mm thick (0.063 inches) with 1 ounce copper on both sides. For four layer boards, the internal copper is 0.5 ounce.The minimum specs for 2 layer orders are 6 mil traces with 6 mil spacing, and 13 mil drills with 7 mil annular rings.The minimum specs for 4 layer orders are 5 mil traces with 5 mil spacing, and 10 mil drills with 4 mil annular rings.Internal cutouts are allowed and supported. Draw them on your board outline layer.Plated slots aren’t supported.So 5/5!

author: jeremy
author_rank: Super Contributor
timestamp: February 06, 2015, 10:03:43 am
content: For the record, the cheapest supplier I found (and whom I went with) was itead studio. They offered me 10 boards of 5cm x 5cm with 3mil track/space for US$99, although I don't know if this is standard. No laser vias though.I normally go with elecrow, but their price was $50 higher for the same board.
EMC prediction feature for PCB designers - Page 1
Forum section: electronics / general

author: ayed
author_rank: Newbie
timestamp: February 05, 2015, 02:18:53 pm
content: Dear PCB designers,It has been recently demonstrated that the radiated electromagnetic immunity of a PCB with components could be predicted without resort to complex 3D modeling and simulation tools.As an EMC research team, an idea came across our minds: why don't we empower PCB designers with this progress?If such an idea seems interesting to you, you can probably give us few minutes of your time by answering these questions:https://docs.google.com/forms/d/1d5QZfWMl6uAQ6WoscnJ8vZ6C5Aa48HKaTPg18J_dk4o/edit?usp=sharingWe promise to publish the results of this survey once we have a representative set of answers. Thank you in advance for your collaboration.This is a simple illustration for the benefits of this EMC prediction feature once integrated in the CAD tool.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: February 05, 2015, 02:24:04 pm
content: Just far field immunity? A rather limited case I would think... why not just put the poll in the thread?Sorry but I'm not going to give out my e-mail just for that.Tim

author: KJDS
author_rank: Super Contributor
timestamp: February 05, 2015, 02:57:42 pm
content: That's a poor way to start a marketing campaign.
Altium - DRC violation message - Page 1
Forum section: electronics / general

author: Jayy
author_rank: Contributor
timestamp: February 17, 2015, 12:58:28 pm
content: Hi,Can someone please help.In Altium 15.xx version when using DRC in PCB how to get the errors listed in the message Panel.Thanks,Jay

author: Jayy
author_rank: Contributor
timestamp: February 17, 2015, 01:24:32 pm
content: Its working now. I closed the app and restarted.Don't know what made that happen.Regards,Jay
[SOLVED]Need help on altium log in - Page 1
Forum section: electronics / general

author: blueskull
author_rank: Unknown
timestamp: February 05, 2015, 06:45:51 am
content: I just downloaded circuit studio's installer, and logged into my account. However, I can not download the package, it says my internet connection was problematic. After several trials, they banned my altium account, so every time I try to log in, it says "Attempt to login with Inactive Organisation".Has anyone encountered such things?
Downloading DEX - Page 1
Forum section: electronics / general

author: ElektroQuark
author_rank: Unknown
timestamp: January 26, 2015, 04:03:00 pm
content: Hi Iliya,Can you probide the DEX download in ZIP file format?Some firewalls make hard to download exe files.Thank you.

author: firewalker
author_rank: Super Contributor
timestamp: January 26, 2015, 04:49:39 pm
content: It should be an encrypted zip file with encrypted file names also.Alexander.
Multilayer PCB vias - what am I looking at here? - Page 1
Forum section: electronics / general

author: stevenhoneyman
author_rank: Regular Contributor
timestamp: February 22, 2015, 06:25:10 pm
content: I'm working through deconstructing an 8 layer PCB and want to make sure I get this right before I make a few thousand mistakesAttached is part of an image showing just underneath the outer layer of copper. For reference the 'large' hole is 1/16".I see two types of via, small "dots" and hollow "circles". The dots only appear in layers 1&2, 7&8 but the circles can span all layers.Reading wikipedia suggests to me that the dots are "microvias" but I'd like a second opinion!

author: mamalala
author_rank: Unknown
timestamp: February 22, 2015, 07:29:20 pm
content: Regular via = going through the whole stack, from one side to the otherBlind via = going from one side to inside the stack, but not fully to the other sideBurried via = only inside the stack, never ending up at either sideMicro via = very small diameter, usually done by laser nowdaysPlugged via = where the hole is completely closed, "plugged"Tented via = a via that is covered with the solder stop maskSo, it seems you have blind micro vias there.Greetings,Chris

author: free_electron
author_rank: Super Contributor
timestamp: February 25, 2015, 05:24:52 am
content: They could still be buried micro vias. You need to peel of another layer.There could even be stacked micro vias.Looks like a smartphone or tablet board to me ..

author: stevenhoneyman
author_rank: Regular Contributor
timestamp: February 25, 2015, 05:45:47 pm
content: Quote from: free_electron on February 25, 2015, 05:24:52 amThanks mamalala; and you're absolutely right free_electron it was a smartphone.It was just a practice run (1st attempt at this) so I've made little effort in tidying this up, but it turned out really well. The only mistake I know I made was I lost a few tracks at the very edges of the board - next time I'll put some scrap boards around the sides to keep it even.I wish I knew of a 3d raster image exploded-layer-view program. I really don't want to have to vectorize this just to spin it around a bit!

author: Layoutguy
author_rank: Newbie
timestamp: March 02, 2015, 04:09:21 am
content: I agree with the previous opinions. The small dots look to be laser-drilled vias, probably plated closed. If these vias extend from an external layer but stop at an internal layer, then they’re classified as blind vias. The larger openings look to be thru vias. Not sure why you’re deconstructing the board, but good luck. Smart phone layouts are usually obsolete and being revised before the product is released for distribution!
Eagle ver 6.3 - how to clear vias? - Page 1
Forum section: electronics / general

author: atferrari
author_rank: Frequent Contributor
timestamp: January 16, 2015, 05:54:45 pm
content: Currently using Eagle ver 6.3, after almost 3 years.The most pervasive difficulty (at basic level): a via is assigned to change layer during a rerouting; trying to delete it later is not allowed because Eagle considers it as part of the net (do it in the schematics, it says...!)I recall deleting a via once after a sequence of wild attempts but could not repeat the series of events.Could anyone help me on this? Gracias.

author: zapta
author_rank: Super Contributor
timestamp: January 16, 2015, 06:03:32 pm
content: You don't delete a via, you 'unroute' it ;-)

author: Howardlong
author_rank: Super Contributor
timestamp: January 16, 2015, 06:20:13 pm
content: Gotta lurve Eagle!

author: nitro2k01
author_rank: Frequent Contributor
timestamp: January 16, 2015, 09:32:15 pm
content: This behavior is identical for anything that is connected to a schematic, whether it's a copper layer, via or chip. It's perfectly consistent that the ripup tool and delete tool have different (semantic) functions. What you remove with the delete tool stays gone. What you remove with the ripup tool is expected to be rerouted later, and not doing so would be an error (DRC). This semantic difference actually matters if you're doing a design in the board editor with no schematic. Using delete will then split your net into two nets, whereas ripup will not and will leave an airwire. From this perspective, it should be more clear what Eagle is warning you about.

author: atferrari
author_rank: Frequent Contributor
timestamp: January 16, 2015, 11:01:30 pm
content: Thanks to all for the replies. Ripping up is the way.I was doing wrong, forcing a via where I wanted to change layer instead of allowing it to happen automatically.Yes, too long time I was not using Eagle.

author: zapta
author_rank: Super Contributor
timestamp: January 17, 2015, 06:03:27 pm
content: Quote from: atferrari on January 16, 2015, 11:01:30 pmIt's not your fault, it's Eagle's. ;-)I would like to see it actively developed but it seems stagnant running on inertia. DipTrace moves much faster. I am still using Eagle, waiting for KiCad to get matured.
what do isolated and non-isolated power mean for PCB design? - Page 1
Forum section: electronics / general

author: erdos
author_rank: Newbie
timestamp: January 13, 2015, 05:44:55 pm
content: can someone explain to me what isolated and non-isolated power mean for PCB design?thanks

author: kizzap
author_rank: Unknown
timestamp: January 15, 2015, 01:48:20 am
content: As far as I know, it has something to do with galvanic isolation.That means that there isnodirect conductive paths connecting the supply, and the device. A typical example of this would be a transformer, which isolates line(mains) voltages from the output of the transformer.
What is the Formula to calculate distance between Two Trace - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: December 18, 2014, 09:41:25 am
content: NOTE: This message has been deleted by the forum moderator Simon for being against the forum rules and/or at the discretion of the moderator as being in the best interests of the forum community and the nature of the thread.If you believe this to be in error, please contact the moderator involved.An optional additional explanation is:

author: steve_w
author_rank: Regular Contributor
timestamp: January 13, 2015, 10:29:51 am
content: Try this, cant vouch for it but it looks OK.regardsSteve Whttp://www.saturnpcb.com/pcb_toolkit.htm
Deciphering a set of files - Page 1
Forum section: electronics / general

author: aroby
author_rank: Regular Contributor
timestamp: January 08, 2015, 02:36:01 pm
content: I am a novice when it comes to the software tools for PCB design. I would like to create a toner transfer print for a board for which I have a .zip file containing a number of files that the original author says are Gerbers. I found some nice software called GC-Prevue that can load all of the files and I can create a 1:1 print. My question is what are all of the files? They loaded in as Physical Layers in the software. The extensions are .TOP, .SMT, .SMB, .BOT, .SST and .th. I assume .TOP and .BOT are the top and bottom layouts. The .th appears to be a drill hole file, but I can't get that to load except as a layer.The PCB is not that complicated - 2 layers, with the bottom being entirely ground plane, but it would be nice to know all that I am looking at here!ThanksAnthony

author: Rigby
author_rank: Super Contributor
timestamp: January 08, 2015, 03:18:34 pm
content: Those are Gerber files, I think.SMT and SMB will be SolderMask Top and SolderMask Bottom, those would be where I start. There might also be a solder paste layer that you can export.Gerbers are vector files. Make sure you print them at 100% all the way from the Gerber viewer through to the printer properties. Layers in between will love to "help" you by resizing in various directions.

author: aroby
author_rank: Regular Contributor
timestamp: January 08, 2015, 03:56:12 pm
content: Got it - that makes a lot of sense.Thanks!
CNC'ing PCB's - Aligning board using camera and fiducials. - Page 1
Forum section: electronics / general

author: Mahonroy
author_rank: Newbie
timestamp: January 08, 2015, 12:32:34 am
content: Hey guys, I have been lurking around a bit, and this is my first post.After several failed attempts to find the correct information via google, I figured I would come here and ask.Currently I am using cadsoft eagle to make PCB layouts, pcb-gcode to create the gcode files, and Mach3 to cut the boards.I want to rig up a camera to the spindle, and have software locate a couple fiducials, and have the alignment corrected (either by having it alter my gcode, adjusting some rotation setting, etc. honestly I don't really know).So my question is has anyone done anything like this? Can you point me in the right direction? Thanks and any help is greatly appreciated!

author: IconicPCB
author_rank: Super Contributor
timestamp: January 08, 2015, 01:52:33 am
content: Any correction with the camera is likely to be in the alignment of machine axes.Have a look at G54 command on mach3. It will effectively allow for a touch off of the X,Y and Z axes against a ( camera ) reference.You may have to include a subroutine inside Your CNC G code file.

author: Fred27
author_rank: Unknown
timestamp: January 08, 2015, 11:51:43 am
content: I'm sure I've seen similar stuff over on some pcb-gcode forum. If you're isolation routing the board though, why would you need to? Just mill the traces and route out the board without removing it from the mill.I've now gone from isolation routing to etching so do need to line things up for drilling/routing. I just went with adding a camera to the mill and manually lining things up. It seems to work OK for the few boards I do.http://0xfred.wordpress.com/2014/02/13/cnc-mill-alignment-camera-version-1-0/

author: H.O
author_rank: Frequent Contributor
timestamp: January 08, 2015, 02:03:40 pm
content: And you can use G68 to rotate the X/Y plane a certain angle around a specific location. You'll need external software and interface that to Mach3 if you want it fully automatic but if you can live with the built in Video window and manually "finding" the fiducials you should be able to write a some macros and/or custom button scripts to set the correct offsets and calculate the rotation.
Chinese made QuickPCB2005 software? - Page 1
Forum section: electronics / general

author: dds737
author_rank: Contributor
timestamp: January 08, 2015, 08:08:25 am
content: There is lot of links on *.cn domain for this QuickPCB2005, I've downloaded it, there is no English manual, anybody tried or uses this program?"QuickPcb2005 is the PCB copy board software for rapid PCB the copy board, and introduced the copy board skills, for the PCB board design and production"Link for the program:http://pan.baidu.com/s/1FysS8

author: janekm
author_rank: Unknown
timestamp: January 08, 2015, 09:40:56 am
content: It's PCB reverse engineering / "copying" software... A Chinese specialty, evidently
Multisim blue VS student - Page 1
Forum section: electronics / general

author: asgard20032
author_rank: Regular Contributor
timestamp: February 09, 2015, 01:51:46 am
content: Hi, i need to choose either to install blue or student edition of multisim on my workstation.Or is there are better alternative to multisim that won't cost me a lot of $$

author: Neganur
author_rank: Unknown
timestamp: February 09, 2015, 09:35:08 am
content: You can't use the student version for commercial use and blue's license is only for a year. I think both have the same component count limits.So if you "need to" choose I'd say use the student version if it's for your own use.Depending on your location, the student version is 45 EUR for just Multisim and I think 75 EUR for a bundle of Multisim and Labview.

author: asgard20032
author_rank: Regular Contributor
timestamp: February 10, 2015, 10:45:20 am
content: Except license usage, they both got the same component, utility, ad-don, tool, etc...?(I already got student, but i can only install it at 2 place, already installed it on one computer, was wondering if i would go blue this time, or use my other installation right)

author: rea5245
author_rank: Frequent Contributor
timestamp: March 12, 2015, 01:25:37 am
content: Quote from: asgard20032 on February 09, 2015, 01:51:46 amI wrote a scathing review of Multisim Blue atPCBShopper.com/multisim-blue-review/. I know nothing about the student version.I also maintain a list of free PCB CAD software at PCBShopper.com/cad. There are many similar lists, but what makes mine different is that it tells you in what way the software is limited. Many free CAD packages are crippled versions of expensive commercial software, and it's important to know what restrictions you'll face.There are, of course, unlimited and free PCB CAD programs, and those are included on my list too.I have used the free and unlimited KiCad in the past. I didn't like the component management, so I switched to the free but limited DipTrace (the limitations are acceptable to me). But I've come to the conclusion that component management inallCAD packages stinks. (Altium has a component database manager that looks intriguing, but it's not free - not even close.)- Bob
Wheres the holes? - Page 1
Forum section: electronics / general

author: kvresto
author_rank: Regular Contributor
timestamp: December 23, 2014, 02:34:31 am
content: Hi Everyone.I just created a new 4 layer pcb in Altium summer 09, and now I can see the holes on any pads or vias, just a grey circle,...? no holes,.. whats gone wrong?cheerskv

author: kvresto
author_rank: Regular Contributor
timestamp: December 23, 2014, 02:55:30 am
content: That was it!, great, I was going through all of the online documentation and of course how do you find this one specific thing.Thanks for your help.
Industrial Electric diagrams creation. - Page 1
Forum section: electronics / general

author: firewalker
author_rank: Super Contributor
timestamp: December 03, 2014, 11:45:07 am
content: I have to rewrite a manual that contains some hand written industrial electrical diagrams, made more than one person. I want the new manual to be uniform. Is there an easy to use program to create Electric Diagrams?Example of what I want to create:Alexander.

author: Bloch
author_rank: Unknown
timestamp: December 04, 2014, 05:29:22 pm
content: This program is very easy.[size=78%]http://www.pcschematic.com/en/download-menu/automation/download-free-electrical-cad-software.htmIf it is free you want then Kicad have an sample file.

author: firewalker
author_rank: Super Contributor
timestamp: December 04, 2014, 06:31:53 pm
content: Thanks you. I am testing Qelectrotech for the moment.http://qelectrotech.org/Alexander.

author: aon
author_rank: Contributor
timestamp: December 19, 2014, 12:37:05 pm
content: Elwin isn't too bad for that sort of stuff:http://www.3xm.se/index_eng.html
What is the Formula for distance between Two Trace - Page 1
Forum section: electronics / general

author: Unknown
author_rank: Unknown
timestamp: December 18, 2014, 07:20:17 am
content: NOTE: This message has been deleted by the forum moderator Simon for being against the forum rules and/or at the discretion of the moderator as being in the best interests of the forum community and the nature of the thread.If you believe this to be in error, please contact the moderator involved.An optional additional explanation is:
Wanted to buy - Protel 99SE - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: November 27, 2014, 12:31:13 am
content: Must be original CD and licence key number.Instruction books etc not needed.

author: free_electron
author_rank: Super Contributor
timestamp: November 27, 2014, 01:13:48 am
content: Difficult. you need to activate over the internet. Licences are per 'locale'. if you move a licence from let's say USA to Australia they will detect it.it's not easy to transfer licences.Other problem is that most people run upgrades so the base key is still linked to their account.for example let's say bought protel 99se and then upgraded to dxp , dxp2004 all the way through Altium 15 now. The base key for protel 99se is still the same base key for my altium 15 ...Altium uses two keys for licencing. One is the install key , the other is the user key. So they can trace my user key down to protel 99 ...The moment you register Protel99 they will detect the base key and pin you on locale. There is a transfer fee. And then the user key will get you in trouble as that is assigned to the company that originally bought it. It is a mess.So you will have to find someone who doesn't use it anymore.... get a letter that they sold the licence to you and then go with that to altium to release the lock and assign it to you.

author: mstevens
author_rank: Regular Contributor
timestamp: November 27, 2014, 01:20:40 am
content: Altium licenses, last time I checked, were non-transferrable. That is one thing I really dislike about Altium. There is no way to recoup any of your investment in the product should you no longer need it.

author: IconicPCB
author_rank: Super Contributor
timestamp: November 28, 2014, 09:21:51 pm
content: 99SE gets started with just a security password like windows of old.No online anything.It is the later versions ( post DXP ) which need online component.

author: nctnico
author_rank: Super Contributor
timestamp: November 29, 2014, 02:30:43 am
content: Quote from: mstevens on November 27, 2014, 01:20:40 amIn the EU that is illegal since a few years. If you have the medium (CD/DVD) then the law says you have a valid license.

author: snoopy
author_rank: Frequent Contributor
timestamp: December 04, 2014, 03:18:14 am
content: Quote from: IconicPCB on November 28, 2014, 09:21:51 pmThat's how it was when I was using itcheers

author: Zero999
author_rank: Super Contributor
timestamp: December 11, 2014, 01:05:11 pm
content: Quote from: nctnico on November 29, 2014, 02:30:43 amYes, that's true. Here in the EU, if you've paid for a licence and no longer use it. You're legally allowed to transfer it to someone else. Irrespective of the EULA.
PCB Silicon coating remover - Page 1
Forum section: electronics / general

author: EEVaditya
author_rank: Regular Contributor
timestamp: December 06, 2014, 02:45:05 am
content: Hello,I want to remove the White substance which can be seen on the sides of the PCB in the photo(Please find the attached file).Please suggest any solution for it.

author: Falcon69
author_rank: Super Contributor
timestamp: December 06, 2014, 08:10:00 am
content: If that is the glue like stuff they use to help hold components in place, I don't think there is anything that will get rid of it. You can try soaking the circuit board in 50% Isopropolyne Alcohol and 50% Acetone mix, and see if that helps. Make sure you clean and dry off the PCB afterwards really good before turning it back on.

author: DrJoe
author_rank: Contributor
timestamp: December 08, 2014, 12:38:53 am
content: It probably will require a physical means - like Dremel tool...The Pace company videos on you-tube have a section on removing coatings...

author: nanofrog
author_rank: Super Contributor
timestamp: December 08, 2014, 03:53:57 am
content: Quote from: DrJoe on December 08, 2014, 12:38:53 am+1Shouldn't need a dremel though for silicone mastic. Heat it ~30 seconds or so with a heat gun, hot air station, or even a hair dryer on high (want the silicone mastic to get soft), then scrape it off with a razor blade.
how can see each track current - Page 1
Forum section: electronics / general

author: af1366
author_rank: Newbie
timestamp: December 04, 2014, 10:46:18 am
content: HelloHow Can See for each Track Current in Altium Designer ?Thanks.

author: tautech
author_rank: Super Contributor
timestamp: December 04, 2014, 11:20:16 am
content: Welcome to the furumNot sure that you can.Which version are you using?Normally this is something you would set the trace width for to accomodate the current on each trace/net.You also need to consider whether to use 1 oz or 2 oz PCBGoogle "guideline for pcb trace width" to get guidance on trace current capability.
Where to get library symbols/footprints for P-CAD? - Page 1
Forum section: electronics / general

author: splin
author_rank: Frequent Contributor
timestamp: November 15, 2014, 11:53:56 pm
content: Are there any good ways to get footprints, symbols etc. for up to date components such as recent STM32 microcontrollers for example?Are there 'standard' formats for library symbols etc. that can be converted and imported into P-CAD or other formats? Alternatively are there any format convertors that can convert from popular formats such as ORCAD, EAGLE etc?As a newcomer to PCB design I had naively assumed that component manufacturers would make these available in at least one, if not most of the most popular formats but it seems not to be the case.Are there any sites where libraries are shared? I triedwww.snapeda.combut couldn't get it to work for anything other than Eagle format and in any case it doesn't directly support P-CAD.Thanks,Tony

author: splin
author_rank: Frequent Contributor
timestamp: November 18, 2014, 09:01:31 pm
content: Ok, I guess the lack of responses reflects that not many here use P-CAD, presumably because it hasn't been supported for a number of years. But what do users of other packages do about symbols and footprints? Do most of you routinely create your own?

author: free_electron
author_rank: Super Contributor
timestamp: November 18, 2014, 09:58:07 pm
content: PCAD is dead and buried. why do you want to use a dead tool ?

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: November 18, 2014, 10:18:25 pm
content: Quote from: free_electron on November 18, 2014, 09:58:07 pmBecause it still does the job perfectly well. Ain't broke - doesn't need fixing.

author: nctnico
author_rank: Super Contributor
timestamp: November 22, 2014, 03:16:45 pm
content: Quote from: splin on November 15, 2014, 11:53:56 pmPart of PCB design is creating your own symbols and footprints. Even after 20 years I still need to make at least one new symbol and footprint for every design I create.
Need an upgrade from ARES - Page 1
Forum section: electronics / general

author: IO390
author_rank: Regular Contributor
timestamp: November 21, 2014, 06:46:53 pm
content: I've been using ARES (counterpart to ISIS) for as long as I've been doing electronics, only a year or two, and I'm very used to it. It's been fine so far but it's quite lacking in some areas. For example via stitching, I've not found a way to set a via so it sits solidly in a copper plane. You have to place a through hole then right click on it and set the relief to solid, which is a bit of a bitch when you have to do a hundred of them. From the PCBs I've been doing over the last week I have RSI in my right hand and can't use my PC for more than a few mins at a time before it hurts too much to click a mouse (none of my friends believe it's from PCB editing of course...).Anyway I want something that's a bit more advanced, that also isn't too expensive. I'd love Altium if I could ever get to grips with it, but I don't have that kind of money available. Any suggestions?
So CircuitMaker emailed me today... - Page 1
Forum section: electronics / general

author: c4757p
author_rank: Super Contributor
timestamp: November 18, 2014, 04:24:18 pm
content: Open up the text-only version of the CircuitMaker email that just went out.QuoteDear Whoever

author: PA0PBZ
author_rank: Super Contributor
timestamp: November 18, 2014, 04:31:39 pm
content: The HTML version seems to work better:Hi Paul,Greetings from the CircuitMaker team here at Altium! Here is a quick update on some of the things happening with the CircuitMaker beta program and community
3D Step Model for Altium - Page 1
Forum section: electronics / general

author: EEVaditya
author_rank: Regular Contributor
timestamp: November 15, 2014, 02:39:21 am
content: Hello,I am looking for 3D Step model, I tried on PCB-3D.com. But it's free sign up is offering very limited 3D Step models.And it's paid membership is not affordable for me.Is there any other source where I can get 3D Step models?

author: ElektroQuark
author_rank: Unknown
timestamp: November 15, 2014, 07:34:18 am
content: Here!there are some.You can ask here for a especific model too, maybe someone has it and want to share.

author: hamdi.tn
author_rank: Frequent Contributor
timestamp: November 15, 2014, 08:32:57 am
content: as EdoNork saidhttp://3dcontentcentral.com/is the right place to look for STEP file

author: Precipice
author_rank: Frequent Contributor
timestamp: November 15, 2014, 09:34:08 am
content: Or the manufacturer's website. RS and Digikey also have models where they can.
Digikey and Mentor Graphics Team Up For Cheap EDA Tool.... - Page 1
Forum section: electronics / general

author: Smokey
author_rank: Super Contributor
timestamp: November 13, 2014, 10:56:19 pm
content: I just got an email from Digikey showing off their new $200 USD PCB/Schematic design tool they co-developed with Mentor Graphics.http://www.digikey.com/product-highlights/us/en/mentor-graphics-designer-software/4171?wt.medium=email&wt.mc_id=em_Mentor_Large_11-2014&wt.z_email=35428_DesignerLink_EVN143B0US&wt.v_sub=4851824Gotta love competition! If this thing ties into Digikey's parts database, that would be a big feature.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: November 13, 2014, 11:34:36 pm
content: $200 is schematic only. $600 for PCB+Schematic, with 50 sq. inch limit.And this is a "save 30%" introductary priceAlso confused by "Purchase the Designer Schematic and Layout bundle and recieve a 3 month license extension." - WTF is that about....

author: Smokey
author_rank: Super Contributor
timestamp: November 14, 2014, 12:32:43 am
content: Ahh I got suckered by their promo add.