hybridfree/eevblog-posts huggingface dataset:
Electronic Design Studio? - Page 1
Forum section: electronics / general

author: Chris56000
author_rank: Frequent Contributor
timestamp: October 29, 2017, 11:24:46 pm
content: Hi!Has anyone ever used, or still got a licence for, Electronics Design Studio, a British EDA product released as a successor to Quickroute 4.0/5.0?I designed a project for a previous employer on it, and I remember it always had one notorious bugbear, and that was corruption of the "EDS Key Disk" used to activate it!Originally issued on cd with a floppy "key disk", they went over to a serial–key system about 1994 but that wasn't any more reliable either – I made more calls to their help desk over that than any other issue!They went out of business about 2004/2005 with little warning – for about 4–5 weeks prior to closure, their website said "Our new website is under development" and that was all – I only found out about the firm closing when I got a red–cross box from EDS saying Activation Failure!!(I remember their help desk refused to help with backing up the hidden "key–file", but however their system worked, it seemed to be effective because EDS never, to the best of my knowledge, got "cracked" in it's lifetime!)It wasn't cheap software for the size/layer/functional limitations you had to put up with but it one good thing going for it – it could do True Type Fonts on PCB silkscreen that rendered correctly on Gerber's!Comments?Chris Williams

author: tycz
author_rank: Regular Contributor
timestamp: October 30, 2017, 02:18:26 am
content: I can't help you with Electronics Design Studio, but I noticed you mentioned the use True Type fonts on the PCB here and in the your other Kacad thread. There's a PCB design software package called PCB Elegance which has this feature. It was sold commercially until the developer went out of business about five years ago. Instead of taking the software with him, he made it free and released the source code under the GPL licence. Now I'm maintaining it. It is (very roughly) equivalent to Kicad an Eagle in terms of features. The main downside in the user base (and development speed) is much smaller than those tools.The website is athttp://www.pcbelegance.orgif you're interested.

author: Chris56000
author_rank: Frequent Contributor
timestamp: October 30, 2017, 08:16:49 pm
content: Hi!I've downloaded the latest available copy of PCB Elegance, the update files and 168-page manual!I'll get some binder covers from work when I'm back on duty and print the Manual for homework reading tomorrow - Was TinyCAD the schematic package that was intended to be complementary to it, or did the PCB Elegance developer intend to make his own package?Chris Williams
Help needed with component identification - Page 1
Forum section: electronics / general

author: helpwithcomponents
author_rank: Newbie
timestamp: October 30, 2017, 05:08:34 pm
content: Hi!I request help identifying a component on an automatic garage door controller board. It is a RotaMatic 437710. 2 of the same components blew up, and i cant find out what they are. Both of them are in series with the input, 1 of them is on line, and the other on live. I will attach multiple pictures.Thanks in advance!
Am I misunderstanding what an analogue switch does, eg 4066. - Page 1
Forum section: electronics / general

author: supernovah
author_rank: Newbie
timestamp: October 29, 2017, 02:00:39 am
content: ...

author: Richard Crowley
author_rank: Super Contributor
timestamp: October 29, 2017, 02:22:43 am
content: Suggest studying the data sheets to see how your tests should be conducted. In particular, note the source and load impedances used for valid tests.Will you see some control signal leakage at the input and/or output node? Sure, if you are looking at without any termination. But that is not a "real-world" configuration, so the results of the test reveal nothing useful.

author: Richard Crowley
author_rank: Super Contributor
timestamp: October 29, 2017, 04:44:22 am
content: You are looking at those nodes/pins at a very high impedance. Perhaps 1M or more depending on your probe and scope (not revealed).That IS NOT a valid test! You will never use a 4066 in such a high impedance circuit. Those tests mean nothing in the Real World.If you have your input and output nodes/pins terminated at 10K or so to ground, do your measurements again and get back to us. Otherwise, your measurements seem to have no Real World significance.Repeating: Will you see leakage from the control node into the input and/or output nodes? Sure,if they are floating at high impedance.That is normal and expected. It is also not a Real World condition and has no implication on how it is used in the Real World.A solid-state quad bilateral switch is NOT a hard metalic contact relay. It is a very complex solid state composite circuit which cannot even be shown as equivalent conventional discreet components. Those equivalent circuits are only "logical equivalents". All solid-state devices from diodes and simple junction transistors to the most sophisticated IC are very complex devices that will never behave in a perfect theoretical model.However, your "test circuit" is almost a "sample and hold" type of application, and note that the 4066 data sheet says:Quote

author: Ian.M
author_rank: Super Contributor
timestamp: October 29, 2017, 04:49:21 am
content: Its 4000 series CMOS which generally has logic thresholds of 20% Vcc for Vil and 80% Vcc for Vih (unless the specific datasheet states other thresholds). If you are using +/- 7.5V supplies that means you need the switch enable pins to swing from below -4.5V to above +4.5V to ensure correct operation. Leaving CMOS inputs floating is forbidden, so add 10K pulldowns to the -7.5V rail (to hold the associated switch off) on all enable inputs if they aren't permanently connected to a push-pull drive circuit.The current source maximum voltage *MUST* *NOT* exceed the 4066 supply rails.What current and what value capacitor were you using? Some nonlinearity is to be expected at higher currents due to the variation of On resistance with channel voltage, and at lower currents, gate charge injection is likely to be significant.
Batch script to rename Gerber file extensions. - Page 1
Forum section: electronics / general

author: suku
author_rank: Contributor
timestamp: October 27, 2017, 12:45:43 pm
content: I use Proteus 8 and when I use the old gerber format (RS274X) it spits out *.GBR files. The fabhouse (PCBWay) wants all the files to have different extensions (.GBL for bottom layer, .GBO for silkscreen overlay etc...) Having the rename all of the files gets tiring quite fast so I wrote a batch script to automate the process...I always check gerber files before production just to make sure everything is fine (Free Online 3D gerber viewer:http://mayhewlabs.com/webGerber/) and guess what, the batch file works great!If you want to use it yourself you'll probably have to modify a couple of things but the script is so simple that pretty much anyone could do it! (Also don't hold me responsible if anything goes wrong)I linked in below to script and a screenshot of what it does. enjoy!GerberCNV.batCode:REM =========== RENAME TOP LAYER FILES ================rename "*- CADCAM Top Copper.GBR" "*- Top Copper.GTL"rename "*- CADCAM Top Silk Screen.GBR" "*- Top Silk.GTO"rename "*- CADCAM Top Solder Resist.GBR" "*- Top Resist.GTS"rename "*- CADCAM Top SMT Paste.GBR" "*- Top Paste.GTP"REM =========== RENAME BOTTOM LAYER FILES =============rename "*- CADCAM Bottom Copper.GBR" "*- Bottom Copper.GBL"rename "*- CADCAM Bottom Silk Screen.GBR" "*- Bottom Silk.GBO"rename "*- CADCAM Bottom Solder Resist.GBR" "*- Bottom Resist.GBS"rename "*- CADCAM Bottom SMT Paste.GBR" "*- Bottom Paste.GBP"REM =========== RENAME DRILL & MECH FILES =============rename "*- CADCAM Mechanical 1.GBR" "*- Mechanical.GBR"rename "*- CADCAM Mechanical 2.GBR" "*- Routing.GBR"rename "*- CADCAM Mechanical 3.GBR" "*- Board Outline.GKO"rename "*- CADCAM Mechanical 4.GBR" "*- Documentation.GBR"rename "*- CADCAM Drill.DRL" "*- Drill.DRD"

author: DerekG
author_rank: Frequent Contributor
timestamp: October 27, 2017, 01:06:56 pm
content: Great work, but we have used PCBWAY quite a lot & DipTrace spits out the Gerbers in the same format as Proteus ............ and PCBWAY have never complained to me about the format.Having said that, I note that Altium spits out the Gerbers in the format that PCBWAY prefer.
(SOLVED) What design program to open .sch and .pcb files? - Page 1
Forum section: electronics / general

author: vk2amv
author_rank: Unknown
timestamp: November 15, 2017, 09:13:09 am
content: Hi all,I am hoping someone can help me identify what program was used to create a schematic and pcb file.The Github repository of the project I am trying to open is herehttps://github.com/BG4TGO/MMDVMUnfortunatly very little information provided, and the only two important files look to be the .pcb and .sch files.So far I have been unsucessful opening them trying Kicad, Designspark, and Eagle.Any help would be muchly appreciated as I am wanting to get some PCB's made of this.Thanks in advance

author: AndyC_772
author_rank: Super Contributor
timestamp: November 15, 2017, 09:14:42 am
content: .sch and .pcb are used by PADS.

author: vk2amv
author_rank: Unknown
timestamp: November 15, 2017, 09:38:02 am
content: Quote from: AndyC_772 on November 15, 2017, 09:14:42 amYou sir are a saint.I have been banging my head against the wall all afternoon with this.Downloaded the PADS viewer and they opened straight up.Now to work out how to export the files to Kicad or Eagle.That is the next problem, but the important thing for now is I can view them.Thanks again

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 15, 2017, 09:39:55 am
content: PADS, Eagle, Protel, etc.Try opening the file in a text editor, see if there's a text header to identify it?Tim
Looking for low-cost suppliers of extruded enclosures - Page 1
Forum section: electronics / general

author: Martin F
author_rank: Regular Contributor
timestamp: October 18, 2017, 04:28:25 am
content: Hi all,We are a B2B data logger manufacturer, looking for a new enclosure for our product.In that regard, we are currently looking for low-cost suppliers that can provide a solution for us - and we'd love to hear any tips/ideas from you all!What we're looking for:We're aiming for something ala below examples:https://vector.com/portal/elemente/product_finder/images/logger/gl1000.jpghttps://www.dataloggerinc.com/wp-content/uploads/2016/09/Influx-Rebel-CT-600.jpgI.e. we’re looking for extruded aluminium/plastic enclosures with two end pieces that are molded to fit our connectors/LEDs/USB.The supplier should be able to provide the custom drilling required as part of the package - and ship to Europe.We would really appreciate any inputs on this! ThanksBest,Martin

author: Jeroen3
author_rank: Super Contributor
timestamp: October 18, 2017, 04:42:06 am
content: Check with Bopla or Hammond mfg.

author: ElektroQuark
author_rank: Unknown
timestamp: October 18, 2017, 07:10:31 am
content: don't now about Bopla, but I wouldn't consider Hammond as low-cost.

author: ahbushnell
author_rank: Frequent Contributor
timestamp: October 21, 2017, 12:05:05 pm
content: Depending on the quantity you might try a custom extrusion vendor. We made pulsed light units years ago and had reflectors built using custom extrusions. The tooling was not to bad cost wise and we got exactly what we wanted.Andy

author: fcb
author_rank: Super Contributor
timestamp: October 21, 2017, 04:45:57 pm
content: The cases you've linked to are Alubos 800/1000's made by Bopla. Great quality and used by loads of manufacturers for good reason (I used to have a product range housed in them).They aren't cheap, but you do get what you pay for.If you need a low cost extrusion, then AliBaba has a million companies making them, and they are low cost - but again, you kinda get what you pay for (wall thickness is quite thin). I've designed extrusions before, the tooling is usually sub £1K and the turnaround is short (4-6 weeks), you'll probably have to find someone to chop it up and paint it, or you can get the mill to anodise it (but better to anodise after sawing). Laser cut end panels and a stamped gasket and you're splashproof at the very least.

author: ebclr
author_rank: Super Contributor
timestamp: October 22, 2017, 03:55:47 pm
content: This box cost 2.12 USd in china
Schematic drawing software or website - Page 1
Forum section: electronics / general

author: Peabody
author_rank: Super Contributor
timestamp: October 22, 2017, 02:22:04 pm
content: I'm just a hobbyist, and don't do projects very often. But when I need to share a circuit with someone, my hand-drawn schematics aren't the best option. Actually, they look pretty good, but it just takes time to start over for every change.So I need a (free) schematic drawing program for Windows, or an online site that provides that function. I would rather avoid software that has board layout included, simply because that would be complete overkill and take up too much space.I tried something called TinyCAD, but didn't like the way it looked. Also, I would like to be able to use generic symbols without being required to pick a specific part. And mandatory pin numbers aren't useful.And finally, I want to be able to resize the entire drawing, both for printing and for exporting as a PNG.If anyone knows of something along these lines, I'd appreciate your suggestion. Thanks very much.Peabody

author: Warhawk
author_rank: Frequent Contributor
timestamp: October 22, 2017, 02:35:41 pm
content: Hi, Consider this:http://www.suigyodo.com/online/e/

author: ebclr
author_rank: Super Contributor
timestamp: October 22, 2017, 03:50:03 pm
content: https://www.circuitlab.com/http://everycircuit.com/https://easyeda.com/
Adafruit FLORA Schematic Help - Page 1
Forum section: electronics / general

author: tec5c
author_rank: Frequent Contributor
timestamp: September 28, 2017, 05:13:57 am
content: I am trying to make use of the Adafruit FLORA OSHW schematic however there's something that I'm not sure of.What's the point of all the grounds here?Full schematic below, also available here:https://github.com/adafruit/Adafruit-Flora-Mainboard/blob/master/adafruit%20flora%20mainboard.pdfThe project was imported in to Altium and evidently a few things have changed. However, in the EAGLE version (see link above) some of the GND's are replaced with GNDTAP1/2/3.Any help would be appreciated.

author: ataradov
author_rank: Super Contributor
timestamp: September 28, 2017, 05:29:26 am
content: They are reminders to put those stitch holes for corresponding nets. They did not create a component for that leaf, so I assume it is just done manually on the board.Basically don't pay attention to them if you don't want to repeat the board design as well.

author: free_electron
author_rank: Super Contributor
timestamp: October 05, 2017, 01:57:02 pm
content: brokensauce ... sigh.Why can't people draw proper schematics. Look at that led under R3 : drawn sideways ... Or the crossing at R1/R2. Just swap the damn pins !Here's a bunch of decoupling caps on the 3V3 rail : you figure out what pin you want to attach them to ...And we'll sprinkle in some net names : you figure out what wires to what... It's a wonder tools like Kicad still support wires... i'd figure they would have omitted them since all the 'artists' making schematics in those tools seem to profer stubs of wire ( or even pins without wire) with net names slapped on them. If you ar going that route : just write the goddamn netlist by hand.Draw things logically. Make it clean. Place caps where they need to be.

author: tszaboo
author_rank: Super Contributor
timestamp: October 05, 2017, 02:39:15 pm
content: Obvious Eagle import to Altium is obvious.

author: ataradov
author_rank: Super Contributor
timestamp: October 05, 2017, 04:08:47 pm
content: Quote from: NANDBlog on October 05, 2017, 02:39:15 pmTheir original schematic leaves a lot to be desired as well. But yes, import corrupted stuff even further.

author: tec5c
author_rank: Frequent Contributor
timestamp: October 08, 2017, 01:40:37 am
content: Quote from: NANDBlog on October 05, 2017, 02:39:15 pmWell, it was stated in the original post that it was imported in to Altium.
LED footprint without thermal vias - Page 1
Forum section: electronics / general

author: ocset
author_rank: Super Contributor
timestamp: October 28, 2017, 06:53:07 pm
content: Hello,We are using the Seoul Semiconductor SAW09H0A LED. They are dissipating 2.3W each and are mounted on double sided FR4 PCB of thickness 1.6mm and 1 Oz copper. The PCB sits on a heatsink platform.Our PCB contractor has done the footprint as in the attached. (Red is top copper and blue is bottom copper) The thermal vias are of diameter 0.65mm, but there are no thermal vias under the actual pads of the LED.The datasheet gives no guidance. Do you think that we could get away with putting 0.3mm vias in the actual LED footprint, with spacing about 1mm apart?SAW09H0A datasheethttp://www.seoulsemicon.com/_upload/Goods_Spec/Specification_SAW09H0A.pdf

author: DerekG
author_rank: Frequent Contributor
timestamp: October 28, 2017, 10:33:10 pm
content: Quote from: treez on October 28, 2017, 06:53:07 pmYes, but only if you have the board shop plate the vias shut (ie they will be totally closed). If you don't, the solder paste when in the infrared/vapour phase oven, will be wicked down the holes thereby degrading the heat transfer to the top side of the board.Use a 0.2mm solder paste screen to deposit a reasonable amount of paste under the LEDs.Also, consider using 2oz copper if you can for much better heat dissipation.We have had a lot of production experience with SMD mosfets, even to the point of having x-rays taken of the resultant solder paste spread under under the mosfet heatsink & the above is what we concluded brought about the best reliability.
Printed Inductor design - Page 1
Forum section: electronics / general

author: jtronix
author_rank: Regular Contributor
timestamp: August 13, 2017, 07:17:07 am
content: Hi,I'm looking for printed inductor design software. can anyone help ??

author: Gribo
author_rank: Frequent Contributor
timestamp: August 17, 2017, 08:56:06 pm
content: Saturn PCB can get you started.

author: ahbushnell
author_rank: Frequent Contributor
timestamp: August 17, 2017, 10:38:50 pm
content: Quote from: jtronix on August 13, 2017, 07:17:07 amThere are cores that are designed to work with windings that are in the PCboard. For instance Ferroxcube has "Planar E cores". The core goes through a hole in the board and windings are traces. This is one.http://www.ferroxcube.com/FerroxcubeCorporateReception/datasheet/E14_3.5_5_R_PLT14_5_1.5_S.pdfThey also have other types with half of the windings on the board.Andy

author: BigBoss
author_rank: Regular Contributor
timestamp: August 18, 2017, 02:05:30 am
content: Quote from: jtronix on August 13, 2017, 07:17:07 amCadence Allegro with RF Option will definitely help you but it costs..Second option is to use a 2D and cheap/free CAD program then import the sketch into PCB program as DXF format but it's a bit troublesome.

author: rs20
author_rank: Super Contributor
timestamp: August 18, 2017, 04:48:36 am
content: OP, can you confirm whether you just want software for generating gerbers for a printed inductor; or do you indeed want to actually electromagnetic simulation/analysis of said design?

author: jtronix
author_rank: Regular Contributor
timestamp: August 18, 2017, 06:28:49 am
content: I want tool where i can get the design by just putting inductor value.

author: chhrisedwards
author_rank: Contributor
timestamp: October 03, 2017, 10:30:34 am
content: There are different types of inductors designed for various system applications. I am referring a link to you as below, may this will helpful.http://www.electronicecircuits.com/electronic-software/inductor-design-softwareThanks.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: October 03, 2017, 10:51:00 am
content: Just how many inductors are you making, that you need a one-click solution?You must have a generous budget to pay for it, then.Tim
FREE Schematic Symbols & PCB Footprints - Page 1
Forum section: electronics / general

author: paulcav
author_rank: Contributor
timestamp: March 22, 2017, 09:34:46 pm
content: Here is website that i found where you can search for a component and download the library for the CAD siftware of your choice, Eagle, Altium, Diptrace and many others. If the library doesn't exist then it can create one and notify when it is completed, it can even find the data sheet of those difficult to find components.SamacSys is the leading developer of software tools for creating and managing electronic component ECAD data.For more information:http://www.samacsys.com/

author: Mattylad
author_rank: Regular Contributor
timestamp: March 23, 2017, 07:58:49 pm
content: I don't think its a case of downloading a "library" more of individual library parts/symbol/component.They are relatively new on the scene and my experience of using their ecad wizard is that although the part creation was good, there are several problems I encountered with the symbols and components. Certainly requiring additional work by me after importing into my CAD package.

author: ELECENG86
author_rank: Newbie
timestamp: September 19, 2017, 03:16:07 pm
content: Mattylad you are correct - I just tried and it is on a per part basis. I'm personally pleased about this as I do not want lots of parts in my library that I will never use.They will create models for free. I've been using them a few years and I have found them very reliable and fast.I have not had to modify any of the downloaded content on 50+ parts I have used but I do not use the Excel plugin I just download from the website with their Library Loader.

author: Mattylad
author_rank: Regular Contributor
timestamp: September 19, 2017, 06:29:50 pm
content: I'm picky, I want my symbols and components to be completely correct to how they should best be done in my CAD package.Unfortunately I found that this was not the case with them, they may be better now - however you get no choice in what you get (component wise) - you just get it.
What is this component ? - Page 1
Forum section: electronics / general

author: pacmac
author_rank: Newbie
timestamp: September 13, 2017, 10:43:08 am
content: Did not really know where else to post this so ended up here !This is a 18650 Li Ion charge / battery gauge controller board that I am trying to get to work again, the manufacturer sony seem to have built some kind of kill switch into it such that when the cells are removed, they cannot be re-added again.I have already managed to read the gas gauge chip and it's eeprom and can't see anything obvious there, but in the process of this I have come across a component that I have never seen before which is highlighted.It appears to be sat on a white 'sliver' of something about a milimeter thick, maybe an insulator pad or heat transfer pad, I thought initially it was a mosfet, but I cannot get any continuity across any of the pins either in diode or continuity mode.The identifier is C151 which would suggest it is a capacitor - but with 3 pins ?, Any idea what this component may be ??

author: kony
author_rank: Regular Contributor
timestamp: September 13, 2017, 11:07:45 am
content: Chemical fuse.

author: PA0PBZ
author_rank: Super Contributor
timestamp: September 13, 2017, 11:22:03 am
content: http://battery.newlist.ru/images2/Fuse.pdf
helping to get information about EDA tools  - Page 1
Forum section: electronics / general

author: javad2040
author_rank: Contributor
timestamp: September 07, 2017, 05:59:55 am
content: hi.I am digital designer and i use Altium Designer for PCB design.I knowledge several software(like PADs,Kicad,...) exist that can be chosen for PCB design, but i don't information about.can everybody help me to get information about and features?

author: DerekG
author_rank: Frequent Contributor
timestamp: September 07, 2017, 12:08:36 pm
content: Quote from: javad2040 on September 07, 2017, 05:59:55 amI would suggest you look at the thread below. It contains an exhaustive list of PCB/EDA tools with their manufacturers website links.You will then need to search through them yourself, as only you know what you are really looking for.https://www.eevblog.com/forum/eda/pcbeda-software-list/
Dealing with different PCB/EDA/CAD programs - Page 1
Forum section: electronics / general

author: b_force
author_rank: Super Contributor
timestamp: September 02, 2017, 03:31:30 pm
content: So I work on freelance projects every now and than for companies or institutions (universities).Naturally everyone has his favorite piece of equipment to work with.Unfortunately this is not always in line with what the customer uses.(plus I really hate certain software programs, just can't work with it)So my questions are how you deal with these situation?Are you simply selling you product as a finished project, were you only have the rights to make changes?What do you do in situations when the customer needs to make changes by themselves?And if so, do you have licenses for various software programs, or do you expect that the customer will share a key?Just very curious how you deal with this!

author: nctnico
author_rank: Super Contributor
timestamp: September 02, 2017, 04:48:41 pm
content: I use the software that I use and if they want something different then they have to settle for importing or go somewhere else. I never lost a client or a project because of this. The reason a project gets outsourced is because they don't have the time or knowledge to do it theirselves and that doesn't change when the project needs to be altered.

author: Fgrir
author_rank: Regular Contributor
timestamp: September 05, 2017, 02:53:57 pm
content: When this has come up for me I give the customer two estimates - one using my software and another using theirs. Of course the one using theirs has added hours for the learning curve and requires that they provide me a software seat on their package. My attitude is that if they are willing to pay for it I am happy to spend my time learning a new program.Usually they will go for the first option, but I have had one customer who felt strongly enough about it to go with the second. They were big enough that they did have the knowledge to do it themselves, just not the resources to work on it right now.
AWR / Microwave Office Child Group - Page 1
Forum section: electronics / general

author: rfbroadband
author_rank: Unknown
timestamp: August 05, 2016, 05:42:49 am
content: Dave hast not responded (yet) as to whether he will create a OrCAD child group or not....but along those lines...would anyone be interested in a AWR - Microwave Office child group?

author: tec5c
author_rank: Frequent Contributor
timestamp: August 08, 2016, 12:43:38 pm
content: +1

author: rfbroadband
author_rank: Unknown
timestamp: August 09, 2016, 02:25:23 pm
content: oh boy only 1? please help me out here

author: tec5c
author_rank: Frequent Contributor
timestamp: August 10, 2016, 10:49:55 am
content: It might help if the thread didn't have a typo in itJust kidding.Not sure how popular AWR considering how expensive the licenses are... then again, a lot of people use ADS so I don't know

author: aholtzma
author_rank: Contributor
timestamp: August 11, 2016, 05:07:04 pm
content: +1

author: fourierpwn
author_rank: Regular Contributor
timestamp: August 17, 2016, 01:50:45 am
content: +1

author: tec5c
author_rank: Frequent Contributor
timestamp: June 24, 2017, 02:21:29 am
content: Bump!

author: jpb
author_rank: Super Contributor
timestamp: June 25, 2017, 12:39:36 pm
content: I felt a twinge of nostalgia seeing mention of AWR and Microwave Office. I used to work in GaAs MMIC research and development but switched to computer science around 12 years ago and my hobby electronics is rather lower frequency - but I'm glad to hear it is still around - I can remember when it first started out as a rival to Agillent's Microwave Design Suite.

author: BigBoss
author_rank: Regular Contributor
timestamp: July 09, 2017, 12:15:54 pm
content: Yes, I agree that AWR child group should be organized.Similarly Keysight ADS ( and other derivatives such as Goldengate, EMPro, Genesys etc.) and Cadence/Orcad child groups will be nice.I suppose that ADS child group will be very active and interesting.I'm saying that as a user of ADS since 2000.Or, a simply a thread "RF , Microwave and Optical Engineering"

author: G0HZU
author_rank: Super Contributor
timestamp: July 09, 2017, 10:18:52 pm
content: QuoteI've been using Genesys in its various guises since 1990 when it was changing name from Circuit Busters to Eagleware. I've still got every major version since the dark days of DOS. If there was a league table for users who have created the most Eagleware project files in the last 27 years then I'm likely to be a medal contender... So I have a lot of experience and knowledge in this respectHowever, there is already an official Genesys forum in the link below and there have been 12 threads posted in a year and a grand total of 13 reply posts in that year. So I think a Genesys group here is likely to be fairly quiet too.https://community.keysight.com/community/discussion-forums/eda-software/content?filterID=contentstatus%5Bpublished%5D%7Ecategory%5Bgenesys%5D

author: MrTurk
author_rank: Newbie
timestamp: September 04, 2017, 09:58:46 pm
content: +1Nexus 5 cihaz?mdan Tapatalk kullan?larak gönderildi
Bild my first 3D Printed Cam Adapter?! (CN Translation Request) - Page 1
Forum section: electronics / general

author: Lord of nothing
author_rank: Super Contributor
timestamp: August 29, 2017, 08:40:48 am
content: HiI would like build my first 3D Printed Cam Adapter/ Body.1) What kind of Free Offline Software Can I use?2) Does anyone here how the Filter is normaly Connect with a regular Cam?Maybe someone here speak Chineese:http://zomei.hk/goods.php?id=343#I couldn't find any thread for screw on.here is the well known cam:http://www.delock.de/files/25341.downloadI have the Version with the 48 Degree Lens.The with of the PCB is 0,6mm?The Chips get very hot so i should also stuck some Radiators on to get cool and the noise down.So any ideas and recommendation?Thanks

author: Lord of nothing
author_rank: Super Contributor
timestamp: August 29, 2017, 08:55:55 am
content: wow thats a fast replay.I will block the Visible Light so that just the IR Light pass the Filter.I have the 680, 720, 850, 950 right next to me and I also tried them out with put on the lens dome.The Work how I want.Now its time to make an "Cam" with component for IR Pictures outdoor.It should be waterproof at the End or even splash proof.If the Cam work on an Android I also will expand the Cam Body with an 3D Mount on the Back of a Phone.

author: Lord of nothing
author_rank: Super Contributor
timestamp: September 01, 2017, 06:07:50 pm
content: does anyone where is a professional photographer?

author: Amogachis
author_rank: Newbie
timestamp: September 02, 2017, 08:21:47 am
content: There is a good story to recommend.

author: Lord of nothing
author_rank: Super Contributor
timestamp: September 02, 2017, 12:35:22 pm
content: Sorry I dont understand.
Gerber Parser? - Page 1
Forum section: electronics / general

author: 741
author_rank: Frequent Contributor
timestamp: October 24, 2017, 01:06:02 pm
content: Anyone know of either free Gerber manipulation software or a Gerber parser (C or Delphi/Lazarus)? It was a slow, painful process to create a panelised from multiple designs in KiCad.I looked into gerbmerge, but it looks a bit painful; hardly intuitive or easy to use.Also, out of interest, how easy would simple translate / rotate 90 degree operations be to implement on a Gerber dataset?(I've got a copy of the file format, and it seems well set out, but also very long. I've onlly read a tiny fraction of it).

author: ElektroQuark
author_rank: Unknown
timestamp: October 24, 2017, 01:10:04 pm
content: Trythistool. It may help.

author: 741
author_rank: Frequent Contributor
timestamp: October 24, 2017, 04:38:01 pm
content: Hey, that looks more like it! Thanks.

author: Mattylad
author_rank: Regular Contributor
timestamp: October 24, 2017, 05:46:28 pm
content: Why do you want to panelise the same Gerbers?The fab house are only going to rip them all off bar 1 cct, do their front end work on it (etch compensation etc.) then repanelise it all.Your effectively wasting your time, time that could be better put doing a good panel drawing that tells them what to do, which is something they can do in seconds with their front end software.

author: 741
author_rank: Frequent Contributor
timestamp: October 25, 2017, 10:21:25 am
content: Hi MattNo, I paneliseddifferent'Gerbers'! (In fact: I created several designs for IC adapters in KiCad, then I used File: "Append Board", finally I manually added tabs).So, strictly I was working directly with design files.However, it would be nice to be able to user Gerbers diectly, and to have some help with the layout from a dedicated tool.RegardsStephen

author: Warhawk
author_rank: Frequent Contributor
timestamp: October 25, 2017, 11:16:00 am
content: @Edo: This looks great ! I wish I had this some time ago.@741: Do Itead really charge extra when you have multiple designs on the pre-paid board or they don't care?

author: 741
author_rank: Frequent Contributor
timestamp: October 25, 2017, 02:01:49 pm
content: No extra chargeI checked with them first "is this OK", and they said basically "send us your files to check". It was OK, no problems.I used 2mm router slots.Main other thing is you ensure nothing can fall off and damage their equipment, result must be mechanically rigid.
How do I model an ideal load? - Page 1
Forum section: electronics / general

author: bri
author_rank: Contributor
timestamp: September 01, 2017, 04:34:50 pm
content: I’m very new to circuit modeling, and I’m trying to design a circuit in a Spice-powered designer. I want to insert a black-box model of an ideal 12A@5v load.I know a “current source” is a “truly ideal” model, but (presumably because voltage would equal infinity) the simulator throws an error when the current source does not have something attached to both ends. I want to be able to “switch off” my load, so this doesn’t work.Is the solution simply using Ohm’s law to calculate a resistor value and then use a resistor as my load? 5/12=0.41666… so would a 0.4166? resistor suffice to simulate a back box that draws 12A at 5v?Sent from my iPhone using Tapatalk

author: Ian.M
author_rank: Super Contributor
timestamp: September 01, 2017, 05:06:32 pm
content: It depends what sort of load its powering - a resistor is of course fine for modelling a resistive load, but many loads aren't resistive. e.g. a load with a linear regulator at its input looks more like a current sink, with the load on the linear regulator setting its input current, and a load with a buck or boost converter or other switching regulator at its input typically looks like a constant power load ove a significant range of voltages and currents.The constant current load is fairly easy to model - just orient a current source to sink current, and put an ideal diode (or at least as near ideal as your simulator will tolerate) across it so it cant take the output off towards negative infinity if your simulation doesn't supply enough current for the load.Constant power loads are trickier, and the details differ depending on the simulator. Here's how LTspice handles it:http://www.linear.com/solutions/7846
Simple'ish BOM software recommendations? - Page 1
Forum section: electronics / general

author: MWP
author_rank: Contributor
timestamp: August 19, 2017, 11:11:21 am
content: Hi all,I'm looking for some simple inventory / BOM / order list software (preferably freeware).I would like to:- keep a local parts inventory- import project BOMs from Altium- combine BOMs into a larger list- make a to-order parts list based on whats needed, and quantity by best price breaks.I've looked at BOMER. Its a bit unfinished and doesnt quite do what im after.Any other suggestions?Thanks

author: Eternauta
author_rank: Contributor
timestamp: August 28, 2017, 01:27:50 pm
content: There was a nice and low cost BOM software called Parts&Vendors from trilogy Designar, but unfortunately it is now unsupported.Looking for future alternative to P&V, I found:- Parts-in-Place (http://partsinplace.com)- OpenBoM- miniMRP- FusePLM- PDXpert PLMAny of this is freeware but low cost respect to other package like Civa, bought from Altium some years ago.Regards

author: DTJ
author_rank: Super Contributor
timestamp: August 28, 2017, 01:31:18 pm
content: I too am looking for the same solution.There are lots of threads on here covering various offerings.I've tried quite a few of the stand alone local storage packages but none really do the whole job.minimrp looks like a good solution, I can't quite justify the US$200 (from memory) price tag just yet.

author: msr
author_rank: Regular Contributor
timestamp: September 01, 2017, 04:05:43 pm
content: BOMER developer here!If it doesn't do exactly what you're looking for let me know. Since it's under active development there's a good chance it can be improved in a very short time according to your input.http://bomer.co/https://gitter.im/testjig-bomer/Lobby
IPC-2581 RevB file standard - Page 1
Forum section: electronics / general

author: owiecc
author_rank: Frequent Contributor
timestamp: August 31, 2017, 02:59:52 pm
content: Anyone has a copy of the standard? They mention it is free on their site but then you get redirected to a shop where you can buy it :/http://www.ipc2581.com/index.php/ipc-2581-standard-files
Question on PCB stackup - Page 1
Forum section: electronics / general

author: ppwlee
author_rank: Newbie
timestamp: August 24, 2017, 08:38:07 pm
content: Newbie here. Looking for feedback on the following stackup from one of our designer.- 4 layer PCB, original design stackup shown below- PCB fab shop has concerned about asymmetric core design and recommended a balance design with 0.5oz copper across all 4 layers- 0.5mm Core/Prep is also not standard, hence 0.46mm was suggested- as a result of the revised stackup, a 35um finished copper, ~10% increase in trace width was suggestedNeed help on:1. Is there an obvious problem with the current stackup?2. Our designer does not want any change on trace width (RF application), what would be our options?Thank you in advance!
Properper Enclosing for LiPo Batteries - Page 1
Forum section: electronics / general

author: beeboopbeep
author_rank: Contributor
timestamp: August 23, 2017, 02:35:55 am
content: Hi everyone,I wanted to create a simple portable LED lamp that's rechargeable and opted out to use LiPo batteries instead of NiMH batteries because of costs: IC for recharging NiMH batteries cost between ~5 to ~10 CAD whereas LiPo recharging ICs cost ~2 CAD and it seems the battery capacity per dollar is similar for LiPo to NiMH. However, I am always told that LiPo batteries are dangerous and should be handled with care (although, you can probably argue that for all batteries).I plan on making either a wood or acrylic body for the lamp and I was wondering if there is a proper enclosure method/structure for placing the portable LiPo batteries in the body. I'll probably carry this to outside to use in backyards and make it water resistant if time permits. I'm mostly worried about the battery moving around inside the body and if any special care such as cooling is needed. My initial thoughts for the LiPo enclosure was adding some soft padded tapes to help damp any movement when carrying this lamp around and having some sort of hinges holding it in place.Thank you.

author: sleemanj
author_rank: Super Contributor
timestamp: August 23, 2017, 02:42:17 am
content: If using 18650 cells (or other cylindrical metal cased cells) then they are pretty tough, just make sure they can't short out, and use protected cells.If using pouch cells (or other soft-shell cells) then you need to think about puncture and crush protection, and use protected cells.NB: Protected cell means a cell which has a protection circuit on it to prevent over discharge (low volt), over charge (high volt) and over discharge current/short circuit, they do not typically protect against over current in the charging direction, only discharging.
Simulation Model - Page 1
Forum section: electronics / general

author: 47box
author_rank: Newbie
timestamp: August 18, 2017, 05:29:07 pm
content: Hi,Does Altium Designer has a tool to view graphically a netlist subcircuits from a model.I have this diode model description as a exemple:.SUBCKT PLVA665A 10 30*These components model forward-biased conditionsD1 10 20 DIDEALD2 10 20 DRECOMBD3 20 30 DHIGH*These components model reversed-biased conditionsD4 30 60 DPARASITICRZ 50 60 0.295Vbrk 50 10 6.5* Subcircuit models* + BV = 5.1893* + IBV = 2.12E-01.MODEL DIDEAL D+(+ IS = 5.3574E-16+ N = 1.0029+ TT = 1.3215E-07+ CJO = 1.1942E-10+ VJ = 0.62169+ M = 0.32565+).MODEL DHIGH D+(+ IS = 13.56610489+ N = 1.0029+ RS = 0.29276+).MODEL DRECOMB D+(+ IS = 2.59678E-07+ N = 5.919766159+).MODEL DPARASITIC D+(+ N = 0.001+ RS = 0.001+ CJO = 0.001P+).ENDS PLVA665AAny possibility to see graphicaly the subcircuits or it should be made by hands.Thanks

author: 47box
author_rank: Newbie
timestamp: August 21, 2017, 03:35:59 am
content: Please moderator, can you delete this post? I tried but I can not delete. I don´t know what is this question I did .Anyway.....
Routing guidelines for shared pads / nets? - Page 1
Forum section: electronics / general

author: sporadic
author_rank: Regular Contributor
timestamp: August 15, 2017, 12:57:42 pm
content: For nearby pads which share the same net, which is the best way to route the following and why? I'm thinking Option #2 for both is correct, but appreciate your feedback. Thanks!-shelbyGND #1GND #2VBUS #1VBUS #2

author: Rerouter
author_rank: Super Contributor
timestamp: August 15, 2017, 01:02:08 pm
content: 2nd option for both. It is less likely to have the parts but up against 1 another. GND1 is a bit of an acid trap.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: August 15, 2017, 03:38:15 pm
content: Use two vias, one for each capacitor (assuming these are capacitors). They can still be linked, pad to pad. This reduces the stray inductance. You can even use three (one inbetween), or more.Avoid sharp corners. Acid trapping is a thing of the distant past, but it doesn't look good.Avoid long distances on bypass traces.You can also fill GND on top and bottom, stitching with vias frequently, to emulate an inner ground plane layer.Also avoid pad entry imbalance. That is, don't have a huge blob of connecting copper on one pad, and a teensy trace on the other. Example might be a 10 mil trace to a pull-up resistor, the other pad having a big fat 20 mil VDD trace running through it. The 20 mil trace enters and exits, for a total perimeter of 40 mils, so the pad balance ratio is 4:1. 2:1 is normally recommended.Pad imbalance is a bigger issue for 0603 and smaller parts, where tombstoning during reflow is likely.Lengthwise and diagonal (corner) pad entry is also recommended for the same reason. Or if you have side entry, make it balanced. This helps prevent twisting of the part during reflow.Tim

author: Mattylad
author_rank: Regular Contributor
timestamp: August 16, 2017, 07:22:52 pm
content: While you may think that acid traps are a thing of he past, just nip to a fab house and ask them.Every time I have asked they have told me that it still is, maybe not as much but still important to design out.
Required clearance for opto-isolated DALI  comms signal? - Page 1
Forum section: electronics / general

author: ocset
author_rank: Super Contributor
timestamp: August 10, 2017, 08:07:05 pm
content: Hello,We have a DALI signal which comes into our non isolated offline LED driver. The DALI signal is isolated from the receiver in the LED driver by a TCLT1000 optocoupler..TCLT opto datasheethttps://www.vishay.com/docs/83515/tclt1000.pdfThe problem is , that its too long to fit on the PCB. We need to use a smaller opto…..Do you think we will be able to use the LTV-356 optocoupler which is 3mm shorter….http://www.mouser.com/ds/2/239/LTV-356T%20Series-1308-301539.pdfWill the clearance still be adequate with the LTV-356 opto? Also, if not, then can we just use a cutout in the PCB to increase clearance like that?

author: floobydust
author_rank: Super Contributor
timestamp: August 10, 2017, 10:27:48 pm
content: What is your isolation voltage requirement for your product's regulatory approvals?The product is double-insulated?
PCB Toner Transfer Paper (Glossy Paper) - Page 1
Forum section: electronics / general

author: rckanta
author_rank: Contributor
timestamp: June 14, 2017, 05:12:21 pm
content: How much GSM is required for the PCB Toner Transfer Paper (Glossy Paper)?

author: tautech
author_rank: Super Contributor
timestamp: August 08, 2017, 01:42:43 pm
content: I found the waxy paper backing from self adhesive labels worked well with my processes using a 600 dpi HP 6MP Laserjet but when I went to a 1200 dpi Oki to reduce poly pour porosity there was too much or the wrong sort of toner and the transfer smudged terribly.Been experimenting with more porous papers, the transfer works well but removing the paper is problematic unless you soak it off. Then you have to be careful that there's no remnants or film from the paper left behind that can bugger the etch.Experiment lots and when you find what works for you, stock up on the paper and share your process with a detailed description to help others along the same path.
Cut off DNP PCB parts/area? - Page 1
Forum section: electronics / general

author: nardev
author_rank: Unknown
timestamp: August 02, 2017, 04:31:26 am
content: I never saw somebody doing that, so i'm curious if that has sense.Basically i have part of circuit (in my case, only few parts there, capacitor and single phase bridge rectifier) which is optional. But, in case it's not needed, i would rather cut it off and put the device in smaller different enclosure.In general, that part is marked as DNP so it's by default empty... and, it's such a tiny cost difference that i would rather keep it on board than developing different versions of boards.Also, i want to avoid board-to-board connectors which would make this optional thing as attachable if needed...Is that something which makes sense and which is ok to do?Is there any guidelines how to do that properly?thnx

author: floobydust
author_rank: Super Contributor
timestamp: August 02, 2017, 05:00:31 am
content: This is an example I've seen, I do not know if it worked out. You save a few wires and two mounting holes, and cost of the 2nd PCB I guess.See many holes/partial slots on PCB where you can break off the PCB.Wire jumpers can be used to connect the two or you leave copper.

author: nardev
author_rank: Unknown
timestamp: August 02, 2017, 10:24:52 am
content: wou, thank you for the example images...I couldn't find them..Just wondering, what would i need to make those "dots/holes" on PCB so that manufacturer can make it properly ...

author: Pitrsek
author_rank: Regular Contributor
timestamp: August 02, 2017, 03:11:39 pm
content: Please note the vias at the separation edge. Highly recommended. They stop pcb track tearing when you separate the parts. Fore example: top trace - via - bottom trace |split area| bottom trace - via - top trace. If you split the part, top traces are intact - the tear will stop at via barrel.Just NPTH dirll hole. Spacing might require a bit of trial and error. I'd start with spacing like for mouse bytes.

author: nardev
author_rank: Unknown
timestamp: August 02, 2017, 07:42:57 pm
content: thnx