hybridfree/eevblog-posts huggingface dataset:
The Tariffs are Still With Us - Page 1
Forum section: electronics / general

author: gnuarm
author_rank: Super Contributor
timestamp: March 20, 2021, 06:07:05 am
content: I had not heard anything in some time about the China tariffs, I expected they were gone. But no, I just had to pay 25% on a sizable IC order.The various component distributors used to add the tariffs as a separate charge but I don't see that anymore. Are they rolling it into the part cost or have they found ways around the tariffs?I need to buy a bunch more and between 4% for using a credit card and 25% tariff, this is much more expensive than I had planned.

author: gnuarm
author_rank: Super Contributor
timestamp: March 20, 2021, 06:47:25 am
content: I was wondering if there is a minimum shipment value for the tariff. If so, maybe I can get around it by buying smaller orders. Then the shipping costs go up, so it would need to be a reasonable quantity, not $100 or something absurdly low.

author: Lowkus
author_rank: Regular Contributor
timestamp: March 20, 2021, 08:04:05 am
content: Can you purchase your IC's in your home country? That is a good way to avoid a tariff.

author: Mr. Scram
author_rank: Super Contributor
timestamp: March 20, 2021, 08:21:04 am
content: Quote from: Lowkus on March 20, 2021, 08:04:05 amThe seller will likely have paid them and charges you for them.

author: Lowkus
author_rank: Regular Contributor
timestamp: March 20, 2021, 08:36:24 am
content: I was thinking there might be something available that was manufactured in the home country, avoiding the added costs of shipping and tariffs.

author: gnuarm
author_rank: Super Contributor
timestamp: March 20, 2021, 04:17:05 pm
content: I would not normally be buying parts at all, but there are two parts that are very hard to find. One is an AKM part that was made in a factory which burned down. The other is simply very hard to find because of the general semiconductor shortage.The only sources for these parts are the gray market through web sites such as Alibaba.Someone pointed out that the tariff is based on country of manufacture, not country of shipping. I doubt these parts were made in China, so I may be due a refund.
plastics and aluminium injection moulding eu  - Page 1
Forum section: electronics / general

author: strawberry
author_rank: Super Contributor
timestamp: February 08, 2021, 05:59:31 pm
content: low volume(10..100pcs) plastics and aluminium injection moulding in eu

author: fcb
author_rank: Super Contributor
timestamp: February 08, 2021, 06:03:29 pm
content: Are you looking for or offering?

author: PartialDischarge
author_rank: Super Contributor
timestamp: February 08, 2021, 06:13:27 pm
content: Quote from: fcb on February 08, 2021, 06:03:29 pmGood question

author: strawberry
author_rank: Super Contributor
timestamp: February 08, 2021, 06:53:36 pm
content: looking forwhat would be tooling cost for approx. 100x100x300mm part

author: SMTech
author_rank: Frequent Contributor
timestamp: February 08, 2021, 09:54:41 pm
content: https://www.avplastics.co.uk/injection-moulding-guidethis is quite an interesting chart ... The Answer is always going to be way more than China but with the upside that it should be easier to work out the kinks & details etc such as how many push out points (non technical term!) you want/need and where they can be.

author: fcb
author_rank: Super Contributor
timestamp: February 09, 2021, 11:15:26 am
content: Quote from: strawberry on February 08, 2021, 06:53:36 pmImpossible to say as size is only part of the equation. A 100x100x300 part could require a few tens of grams of material and be exceptionally simple or could be incredibly complex and require a lot of material and multiple slides, ejection systems etc.. You could be anywhere between £3K and £100K for the tooling.Upload your files to both Xometry and Protolabs - both have some online 'instant quote' systems. I've had success with beating Xometry down by over half

author: strawberry
author_rank: Super Contributor
timestamp: February 09, 2021, 03:14:57 pm
content: found thishttp://kart.com.pl/en/moulds-and-mouldings-production/

author: olkipukki
author_rank: Frequent Contributor
timestamp: February 09, 2021, 03:18:41 pm
content: Why you will need a mould for up to 100pcs order?I mean what is a rationality spending time and $$$ to make tooling for just 100 parts??

author: Ice-Tea
author_rank: Super Contributor
timestamp: February 09, 2021, 03:54:09 pm
content: I tested the waters a few months ago for plastic injection molding for a part not that different in dimensions from yours.Tooling cost was consistently quoted around 15k€ from a few different quotes.EDIT: aside from the dimensions, the part was fairly complex so YMMV.

author: Lowkus
author_rank: Regular Contributor
timestamp: March 20, 2021, 05:33:58 am
content: I have not tried this, but is making your own injection molding machine something that might help you with your project? I saw this video on YouTube and it looked interesting...
Flip-chip question - Page 1
Forum section: electronics / general

author: laejf
author_rank: Regular Contributor
timestamp: March 27, 2021, 12:23:34 pm
content: Hi,I'm wondering if it is possible to perform flip-chip bonding with a die that comes without solder-balls on its pads? Can the solder be applied by the manufacturer performing the bonding or does it have to come prepared from the factory?Thanks.

author: jmelson
author_rank: Super Contributor
timestamp: March 28, 2021, 03:08:52 am
content: Quote from: laejf on March 27, 2021, 12:23:34 pmIf the IC was not intended and prepared for solder bonding, then the bond pads will be aluminum. That won't accept solder very well.Also, if intended for typical wire bonding, the bond pads will be REALLY small, like 10 um square. I think solder pads are made much larger, like 100 um square.Jon

author: jmelson
author_rank: Super Contributor
timestamp: March 28, 2021, 03:20:28 pm
content: Quote from: blueskull on March 28, 2021, 03:12:51 amThanks for the correction, I knew the pads would be too small, but got the number wrong. Maybe I was thinking about probe pads.Jon

author: laejf
author_rank: Regular Contributor
timestamp: March 28, 2021, 08:42:52 pm
content: Thanks for the great answers. I have another question. How strong are bonding wires? My application would sit in an air flow of up to 600ml/min in a 3mm diameter opening. I'm thinking about using a parylene coating aswell and perhaps that would make it rigid enough?
Jumper wire to a BGA - Page 1
Forum section: electronics / general

author: rwaters
author_rank: Newbie
timestamp: March 17, 2021, 04:38:59 am
content: I made an error on my PCB design and need to pull a 0.5mm spacing BGA pad to ground. It is on the outside row so I can see it but there is only .15mm or so of headroom so even the finest Metcal tip won't get under there. Close but not quite. There is a ground pad right next to it just to the side of the IC. Is there a proven method of getting a jumper wire onto a BGA pad. Is there an assembly house that could do.that?

author: mon2
author_rank: Frequent Contributor
timestamp: March 17, 2021, 08:21:04 am
content: I would suggest for you to post some pictures to better document the case.In general, if it can be repaired, consider to contact Alex athttps://northridgefix.com/He has tons of youtube videos on his work.

author: brabus
author_rank: Frequent Contributor
timestamp: March 17, 2021, 09:46:55 am
content: I did it on a 0.8mm pitch BGA; it was reasonably straightforward.I flooded the area with gel flux, heated piece of tinned wire with the tip of the solder, using an adequate solder brigde. I pushed the wire radially onto the ball, until I could feel it progressively popped through it as the ball was melting. This saved the day on a single prototype, just to check that the function was there.On a 0.5mm it's surely more challenging, but still doable.

author: mon2
author_rank: Frequent Contributor
timestamp: March 17, 2021, 11:27:13 am
content: https://youtu.be/bDrpftBjRdk
How do I order from DigiKey China? - Page 1
Forum section: electronics / general

author: supperman
author_rank: Regular Contributor
timestamp: February 12, 2021, 05:39:39 pm
content: Has anyone ordered from DigiKey in China and shipped to an Assembler in China? I can get to the Chinese DigiKey website.. and they don't have an English option (that I can see). Will they accept payment from the US? Paypal?I'm guessing I will figure this out later today.. but was hoping for some tips and best practices / pitfalls?Thanks!

author: mon2
author_rank: Frequent Contributor
timestamp: February 12, 2021, 06:05:44 pm
content: Suggest for you to call Digikey and ask them. They should be able to help you out.Respectively, you are wanting to build in China? The contract manufacturer should be able to purchase the goods on your behalf and add to your invoice. This may be much cleaner. We went through nightmares with assorted duties and taxes when attempting to drop ship goods from Taiwan / USA / Canada to Shenzhen. It is a double-standard over there. Even though the goods were paid for properly during IMPORT to Canada -> then we paid local overhead, after wanting to send back to Shenzhen for assembly - got taxed again. Not happy with that.Respectively, are you sure you cannot source the same goods within China? That would be easier on your pocketbook I would think.

author: supperman
author_rank: Regular Contributor
timestamp: February 12, 2021, 06:20:55 pm
content: Time Critical. I'm trying to buyinChinaforChina.. no import needed. Billing issues too.. this is a complex build and I'm just trying to make it frictionless for the assembler this time around so they don't hit me with extra charges and delays..BUT:It seems upon further investigation that DigiKey China is on vacation longer than the assembler. They are still out till the 18th. (man they are serious about their holiday.. no way DigiKey USA is out for more than 2 days let alone 3 weeks)Also.. it seems I need a Tax ID number to order something in China even if I pay via Paypal or whatever. So it seems the Government tracks everything, including customers. So I think its not possible for me to buy in China.So I'm at a dead end with that plan..

author: exe
author_rank: Unknown
timestamp: February 12, 2021, 06:34:07 pm
content: Does DigiKey have a warehouse in China? Thought they ship everything from the US.

author: supperman
author_rank: Regular Contributor
timestamp: February 12, 2021, 06:43:33 pm
content: Since 2012 I think.. Free shipping to any place in China with $40 min order.

author: supperman
author_rank: Regular Contributor
timestamp: March 16, 2021, 03:26:15 pm
content: Quote from: blueskull on March 08, 2021, 09:25:06 amI did not know that. I do recall shipping free.. and 2-3 days perhaps.. They must move one shipment every day and re-ship to destination within China.
Just registered, Hi, hand re-working 0201 SMD resistors - Page 1
Forum section: electronics / general

author: Zmrbill
author_rank: Newbie
timestamp: April 02, 2021, 09:57:40 pm
content: I had to remove and replace some 0201 resistors yesterday and man it took me a while... Our boards are lead free so that makes it even more fun. We use PACE TD-100 soldering stations which I can't say I'm all that happy with. The heat control doesn't seem as good as Metcal and the tip gets oxidized quickly. What is the general opinion of PACE? What other setups should I be looking at for working with these small parts? Any tips on working with 0201 sized parts to make it easier?Thanks in advance, Bill

author: purfield
author_rank: Regular Contributor
timestamp: April 08, 2021, 03:57:34 pm
content: I have a JBC NASE which can handle 0201 easily. Awesome soldering station. Just don't look at the price tag!

author: asmi
author_rank: Super Contributor
timestamp: April 09, 2021, 04:14:27 am
content: I use PACE ADS200 station for everything from SMA connector all the way down to 0201s.For desoldering I use desoldering alloy (likethisone) which dramatically decreases melting temperature of a solder (from ~205°C down to about 90°C). So once you apply it, you can easily desolder just about anything with a hot gun tuned down to ~150°C. This way you can pretty much eliminate any chance of a damage from thermal shock, and the process is super easy and quick. Just make sure you wick away all alloy from pads after desoldering before you solder replacement.Also when soldering 0201 decoupling caps to a big ground plane make sure you solder in the ground connection first, because it's safer to heat up ground enough when sensitive part isn't there yet.
Is Worldway legit? - Page 1
Forum section: electronics / general

author: kuon
author_rank: Regular Contributor
timestamp: March 10, 2021, 10:31:54 pm
content: I have some trouble finding some parts.I found this website:https://www.worldwayelec.com/And it has the parts I need. I don't mind paying a bit more to have them now.I never heard of them before. Do you know if they are legit/reliable?

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: March 10, 2021, 10:38:47 pm
content: Have not heard of them, but have heard of others using this one to get hard to find partshttps://www.netcomponents.com/
JLCPCB: Tooling holes *and* fiducials? - Page 1
Forum section: electronics / general

author: ebastler
author_rank: Super Contributor
timestamp: March 07, 2021, 05:10:53 pm
content: I plan to get my first PCB populated by JLCPCB soon; have only used them for bare PCBs so far. While it will be a largish board (approx. 20 * 25 cm²), I would like to control where the reference marks needed for manufacturing end up, hence would prefer to place them myself.Do JLCPCB require tooling holesandfiducial markers? They explain how you can place tooling holes (https://support.jlcpcb.com/article/92-how-to-add-tooling-holes-for-smt-assembly-order), and they also explain that fiducials will typically be added by them (https://jlcpcb.com/smt-assembly, question 9).So do they require both? If so, can I place my own fiducials? And if so, what should those look like? Thanks for your advice and experience with JLCPCB!

author: miceuz
author_rank: Frequent Contributor
timestamp: March 07, 2021, 08:06:10 pm
content: I have made PCBs in a panel that was assembled by JLCPCB, I have used standard 1mm copper/3mm mask fidutials from KiCad libraries and 1,152mm tooling holes as specified by JLCPCB. They assembled them no problem.

author: thinkfat
author_rank: Unknown
timestamp: March 07, 2021, 08:07:39 pm
content: You don't need to put either. They will find a place for tooling holes and modify your PCB. Unfortunately, this might impact silkscreen or other PCB text or artwork.If you need to avoid that, put your own tooling holes according to their guidelines and check the respective box in the order form.

author: ebastler
author_rank: Super Contributor
timestamp: March 07, 2021, 09:28:40 pm
content: Quote from: thinkfat on March 07, 2021, 08:07:39 pmThanks. The tooling hole part is clear enough: I want to place them myself, and JLCPCB give detailed instructions how to do it.The fiducials are less clear -- can I place them myself, how many do they need (2 as well, I assume?), what size do they want? But it seems that they accepted miceuz' fiducials, so I will use the same dimensions and see how that goes. Or I'll ask JLCPCB in advance...

author: thinkfat
author_rank: Unknown
timestamp: March 08, 2021, 07:50:06 am
content: Hm, I haven't ever put fiducials on any of my boards, and JLCPCB haven't either when they processed the PCBs. But I've only ordered individual boards, not panels, so there might be a difference there.

author: MarkR42
author_rank: Regular Contributor
timestamp: March 08, 2021, 10:08:07 am
content: I have had several panels made by JLC and they put tooling holes in and their order number on the edge rails, but I've never seen a feducial mark, I think either they don't need them (maybe the vision system can automatically identify board features) or they add them to other extra parts which are cut off later.

author: Styno
author_rank: Regular Contributor
timestamp: March 09, 2021, 03:36:25 pm
content: Our unassembled panels from JLC using the 'Panel by JLC' option always have 4 fiducials and 4 tooling holes on the 5mm edge rails.
Cheapest machine for removing THT components in bulk? - Page 1
Forum section: electronics / general

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: March 08, 2021, 09:11:28 pm
content: Have boards that are about 200mm square, need to remove several THT components including several 32 pin connectors (custom made). These components are coming off for re-use, the boards are scrapped.What is the cheapest desktop solution? Large solder pot? Benchtop mini-wave?

author: madires
author_rank: Super Contributor
timestamp: March 08, 2021, 09:18:07 pm
content: Hot air gun!

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: March 08, 2021, 09:26:41 pm
content: I should add: with speed.I need something that will do this with speed, which was why I was thinking solder pot or fountain.

author: Mangozac
author_rank: Frequent Contributor
timestamp: March 08, 2021, 10:07:56 pm
content: Yeah just a solder pot.

author: pqass
author_rank: Super Contributor
timestamp: March 08, 2021, 10:17:14 pm
content: Even a typical solder pot would be fine as long as you can get all connector pins submerged.A manual job but you should be able to remove them fairly quickly. See:
Is there a company that provides DE soldering components as a service? - Page 1
Forum section: electronics / general

author: sb37_dude
author_rank: Newbie
timestamp: February 26, 2021, 06:47:23 pm
content: Was wondering, with all the excess e-waste out there, as well as the soon to be wasted OLD video cards, does anyone know of a company that offers DE soldering the GPUs as a service?Got an idea......

author: SMTech
author_rank: Frequent Contributor
timestamp: February 26, 2021, 07:09:19 pm
content: In china you can buy weird motherboards that use reclaimed or excess chipsets, sometimes in unconventional combinations. Likewise all those fake gfx cards on Wish etc have access to a large supply of old GPU SKUs, one assumes they had to come from somewhere.So as a service you can contract easily - maybe.. Is someone doing it, almost certainly.

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: February 26, 2021, 09:06:51 pm
content: How would desoldering the GPUs reduce e-waste? It would just create more, seems to me.

author: sb37_dude
author_rank: Newbie
timestamp: February 26, 2021, 10:56:34 pm
content: Reuse would reduce landfill objects. Plus, providing old components for other projects, at a reduced price.

author: bill_c
author_rank: Regular Contributor
timestamp: February 26, 2021, 11:59:50 pm
content: They seem to have a backlog to deal with alreadyhttps://youtu.be/5vN_7NJ4qYA?t=57(kinda loud)

author: sb37_dude
author_rank: Newbie
timestamp: February 27, 2021, 12:30:17 am
content: Is this true for ALL companies that do this?

author: eb4fbz
author_rank: Regular Contributor
timestamp: March 07, 2021, 10:06:39 pm
content: Retronix
FR2/Phenolic PCB Material? - Page 1
Forum section: electronics / general

author: Chris56000
author_rank: Frequent Contributor
timestamp: March 04, 2021, 08:01:22 pm
content: Hi!Will any of the cheap PCB houses manufacture a board design for a vintage CTV in the brown phenolic/FR1 or FR2 material?I don't want to have to remake all the other boards in the CTV to match the one I'm currently designing!Chris Williams

author: mon2
author_rank: Frequent Contributor
timestamp: March 05, 2021, 09:07:19 am
content: Have met with a number of pcb suppliers in HK that can support this requirement.Here is a staple from the pcb industry:tim[ at ]nh-circuitboard.com.hkQuote
Conformal coating - Page 1
Forum section: electronics / general

author: stoyanoff
author_rank: Contributor
timestamp: February 28, 2021, 07:53:19 pm
content: Greetings! I have a high voltage PCB. And I have a problem with the necessary clearance. I want to use a sensor in SO-8 package, but the distance between the rows of pins in this package is too short. The distance is 5.8mm and the needed clearance is 7.1mm(550V). So I want to add a slot beneath and to cover it with somekind of conformal coating. Can use just acrilic(or silicone if it is better for high voltage protection) coat spray or I need to cover it with rubber like rtv11?Thanks!

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: March 01, 2021, 10:40:38 pm
content: Proper spacing rules notwithstanding, I would use epoxy and get it on thick. I don't see how you could sell such a project though. At least in the USA, the first time failure occurred, the lawsuits would start coming in.

author: penfold
author_rank: Frequent Contributor
timestamp: March 01, 2021, 11:03:22 pm
content: Are you intending to sell it?Where did you get a 7.1mm clearance from? Is it mains? AC or DC?Conformal coating only strictly reduces your pollution degree for creepage rather than giving you any additional free clearance, potting would be the way to go in you really need to do so for a production

author: stoyanoff
author_rank: Contributor
timestamp: March 04, 2021, 01:43:51 pm
content: Yes! Potting will be! I`ve changed the construction and I put the problem part on a separated PCB. So now I can cover it with some resin and decrease the polution level. So this will allow me to meet the parameters with lower clearance. And also device could be repaired if it is needed.Thanks!
economical custom length FFC cables? - Page 1
Forum section: electronics / general

author: frogg
author_rank: Regular Contributor
timestamp: March 01, 2021, 02:31:28 pm
content: Does anyone have a preferred place or method to get custom length same-side FFC cables?I'm assuming there's no easy method to DIY FFC's yet

author: Rat_Patrol
author_rank: Frequent Contributor
timestamp: March 01, 2021, 10:38:31 pm
content: Is it truly custom or just hard to find active? Some FPC cables we use are hard to get, found a supply in the UK from Newark that we ordered in. This is for an "active" part number, in current production. There was literally zero stock in the US.

author: frogg
author_rank: Regular Contributor
timestamp: March 02, 2021, 03:48:14 am
content: Thanks for responding...I guess you could say "truly custom", in the sense that I want a specific length. It seems to be relatively simple to find in inch-long increments, but unfortunately, in order to make as flat of an assembly as I want, I need something that I can specify to something around 1-2mm in precision.

author: mon2
author_rank: Frequent Contributor
timestamp: March 02, 2021, 09:20:59 am
content: Try the following. Have not tested them yet but met them in HK.QuoteMore (have used them before for other connectors):QuoteFor connectors (have worked with Diana before):Quote

author: Gribo
author_rank: Frequent Contributor
timestamp: March 03, 2021, 05:08:13 pm
content: Depending on your volume, You can always try the usual suspects: Samtec, Wurth and Molex.
Need cable assembler - Page 1
Forum section: electronics / general

author: jmelson
author_rank: Super Contributor
timestamp: March 02, 2021, 04:48:46 pm
content: hello, all,I'm looking for an outfit that can assemble custom cables for a physics project. What we need is a unit with 16 MCX male connectors on one end of 16 pieces of RG-174 or RG-178 cable, all coming into a 34-pin IDC female connector on the other end. The 34-pin end would terminate each cable to two pins across from each other. (So, the IDC pins 1,3,5, etc. would be the signals and pins 2.4.6.8 etc. would be the grounds.)Does anybody know a good outfit in the US for this sort of work? We would probably need about 20 of these units made.(We checked with an outfit that made similar stuff years ago, they declined to bid.)Thanks,Jon
Other than lcsc who else do you guys use in China for components? - Page 1
Forum section: electronics / general

author: DigitalDeath
author_rank: Regular Contributor
timestamp: March 01, 2021, 11:22:11 pm
content: Other than lcsc who else do you guys use in China for components?Thanks,John.

author: DigitalDeath
author_rank: Regular Contributor
timestamp: March 02, 2021, 02:51:28 am
content: Any other online distributor like lcsc?

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: March 02, 2021, 03:09:21 am
content: Quote from: blueskull on March 02, 2021, 02:59:08 amTaobao is not bad if you know who to buy from.
USB-C PD soldering iron with only-bevel-tinned hoof tips, like Hakko T12-BCF2Z? - Page 1
Forum section: electronics / general

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: February 28, 2021, 02:12:51 am
content: I'm looking for a portable/travel soldering iron, as small and light as practical. USB-C PD would be ideal because a USB PD laptop charger could serve as the power supply.ThePinecillooks perfect, but it takes TS-style tips, which don't seem to come ina hoof/bevel style that is tinned only on the bevel, e.g the Hakko T12-BCF2Z, T12-BCF3Z, etc.Short ofhacking together a control PCB and a USB PD "decoy" module(which would be bulky, not least due to the soldering iron's thick cable), is there an off-the-shelf USB-C PD soldering iron that would be compatible with such tips?

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: February 28, 2021, 10:20:11 pm
content: From what I recall Miniware TS series seem to be the goto portable iron. Pretty sure all of them are USB-Chttp://www.miniware.com.cn/product-category/soldering-pen/electric-soldering-kit/

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: March 01, 2021, 07:29:10 am
content: Thanks for the tip (no pun intended), however those seem to use the same TS-style tips as the Pinecil (or more likely, the Pinecil was based on that design).The current best idea seems to beone of these 24 V T12 soldering irons, powered using a 20 V USB-C PD "decoy" (a better translation would be "spoofing") cable.

author: SMTech
author_rank: Frequent Contributor
timestamp: March 01, 2021, 08:50:33 am
content: At the point you use an expensive genuine high wattage cable spoofer & capable charger, why attach a ghetto iron to the end of it? You can now probably choose any number of other quality irons with a little fiddling on the control side (or use the thermo magnetic type).

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: March 01, 2021, 09:41:19 pm
content: Compactness and lightness ... this is for travel, remember? If the PID controller is good, and the case doesn't transmit too much heat to the hand, it seems adequate.A sexy quick-change solution would be preferable, but again it comes down to the availability of only-bevel-tinned hoof tips.
SMD reflow with shielding can - Page 1
Forum section: electronics / general

author: Simon
author_rank: Unknown
timestamp: February 28, 2021, 10:40:49 am
content: I'm doing a design that will have parts in a steel can. This has a base frame that solders to the PCB so that it's sealed to the PCB but open at the top. A lid goes on top to complete the enclosure.Will this work in a little reflow oven?I am using this can:https://www.we-online.com/catalog/datasheet/3670638.pdf

author: Kean
author_rank: Unknown
timestamp: February 28, 2021, 07:43:19 pm
content: It would depend a bit on the capacity of your little oven, but I'd imagine it would be fine. I wouldn't recommend doing it other than prototypes or very small runs.The datasheet gives a recommended reflow curve for the part. Have you profiled your oven so that you have an idea of how well it can follow a set curve?

author: Simon
author_rank: Unknown
timestamp: March 01, 2021, 06:08:18 pm
content: small desktop IR ovens can't keep up with any curves on datasheets not even small resistor ones. My profile is to hold the board at 100C for a few minutes, then set 230C and just wait till it reflows then turn it back down, that is as close to a profile as i can get.
Production testing 4mm socket - Page 1
Forum section: electronics / general

author: PolarisAT
author_rank: Contributor
timestamp: March 01, 2021, 02:11:10 pm
content: Hi,I'm working on a small production run of a device with some 4mm banana sockets on the side. I would like to do some final calibration and testing after assembly but connecting all the cable one by one to the 4mm banana plugs is tedious. Combining them all together with a mechanical fixture is also something I already tried but then the insertion force is very high. I need to insert ~20 connectors at once.https://www.staubli.com/en-us/connectors/test-and-measurement/test-and-measurement/products-for-test-accessories/sockets-2-mm-and-4-mm/press-in-socket-seb4/Does anyone know how the professional manufacturers do this? E.g. for laboratory supplies like the HMP4040 etc. Do they have some kind of special test connectors or is there someone sitting there plugging them in one by one?Thanks for you suggestions and help!Lars

author: rfe1
author_rank: Contributor
timestamp: March 01, 2021, 03:53:21 pm
content: I'm quite sure there is a test probe from Ingun that fits on a 4mm banana plug.https://ingun.com/en/Products/Productfinder/Normally I use their test probes for various applications and they are available with every imagineable head forms.
PCB mounting - Page 1
Forum section: electronics / general

author: stoyanoff
author_rank: Contributor
timestamp: March 04, 2021, 01:38:11 pm
content: Hi! I need to mount 2 PCB at 90 degree angle. So I am planning to use 2.54 connectors(male and female), but the problem is the device will work in harsh conditions -> vibrations, dust and so on. So what can I use to hold them tight? I don`t find any mounting spacers for 90 degree. Only straight.. Can I use just hot silicone? Or I have to manufacture some metal holders from aluminium for example?Thanks!

author: penfold
author_rank: Frequent Contributor
timestamp: March 04, 2021, 03:29:09 pm
content: Wurth Electronik have some right angled spacershttps://www.we-online.de/catalog/en/em/assembly/smd_spacerIn high vibration, only securing along one edge may not be a good idea unless its only a very short board, extra supporting or a longer "bracket" may be necessary

author: mon2
author_rank: Frequent Contributor
timestamp: March 04, 2021, 03:49:54 pm
content: QuoteHave used Judy's company for a number of years and have met with her at past trade fairs in HK. Solid company, fair pricing, good products.

author: Kean
author_rank: Unknown
timestamp: March 06, 2021, 04:42:44 pm
content: MaybeRichco PCB MB 01will work for you?Edit: Now apparently manufactured by Essentra - but sold by most distributorshttps://www.essentracomponents.com/en-us/p/pcb-mounting-block/pcb-mb-01

author: mon2
author_rank: Frequent Contributor
timestamp: March 06, 2021, 11:51:11 pm
content: Almost forgot about these guys,http://www.kangyang.com/Perhaps the largest in the industry for PCB mounting hardware. They have been at every electronic fair in Asia we have attended.
JLCPCB Through Hole library offerings - Page 1
Forum section: electronics / general

author: phil from seattle
author_rank: Super Contributor
timestamp: February 02, 2021, 06:41:32 pm
content: As noted in the USB Connector thread, JLCPCB is now offering connectors. And, in the over deliver category, though hole components. This is huge. They are offering pin headers, screw terminals, power jacks, audio connectors and magjacks. very exciting.But it brings up a number of questions about how they will be soldering. Is this just reflow? or are they adding wave soldering? And for the screw terminals, they offer the interlocking type - will they lock them together as part of assembly? This is so new that I doubt there is anyone with experience to answer the questions. I have sent questions into them and hope to get answers soon. I will post back what I get from them.

author: thinkfat
author_rank: Unknown
timestamp: February 02, 2021, 07:16:39 pm
content: I guess pin-in-paste for many of the connectors

author: phil from seattle
author_rank: Super Contributor
timestamp: February 02, 2021, 08:15:33 pm
content: Fast response though not a lot of information. Here is what I got back from them:Quote

author: phil from seattle
author_rank: Super Contributor
timestamp: February 02, 2021, 08:16:27 pm
content: Quote from: thinkfat on February 02, 2021, 07:16:39 pmMy guess too.

author: JLCPCB Official
author_rank: Regular Contributor
timestamp: February 02, 2021, 08:58:45 pm
content: As it has been mentioned in the Email of the IT support team, the final detailed notice still not ready to be published on JLCPCB official website.Probably this will be a manually soldering of the through-hole parts because in the labor fees it mentions the "manual assembly fees".Please note that this is just a thought based on the added quote description, in the next few days it will be all clear and visible to everyone and as usual I will get back here to post the updates and the useful details about this topic.

author: phil from seattle
author_rank: Super Contributor
timestamp: February 02, 2021, 09:11:46 pm
content: Sir,Thank you for being responsive to customer requests.Phil

author: jziegler
author_rank: Newbie
timestamp: February 21, 2021, 04:18:17 pm
content: With through hole offerings, including connectors, will it be possible to have some through hole components on both sides of the PCB? I am having a raspberry PI hat built, and I will need to install the connector myself since it is on the back of the board, even though you have the connector (and have it cheaper than I can easily buy it). So is second side assembly only for the newly added through hole components being considered?Thanks
DIY pcb - cold method for toner transfer - Page 1
Forum section: electronics / general

author: iMo
author_rank: Super Contributor
timestamp: March 03, 2021, 08:46:07 am
content: Hi, there are several videos on the cold (heat-less) toner transfer to the pcb - usually a mix of acetone with water or with alcohol/IPA. No heat needed. Looks nice.Do you have any practical experience with it?
Video with very detailed discussion of PCB fabrication and plating processes - Page 1
Forum section: electronics / general

author: MK14
author_rank: Super Contributor
timestamp: February 18, 2021, 04:02:45 am
content: That really is an amazing video. I didn't appreciate how crazily technically difficult, the massive number of processing steps, and all the complicated chemistry stuff. Was needed, to achieve the necessary copper-plating and similar.It makes one, wonder how on earth they can churn out these PCBs (China), so relatively cheaply, even when it is 4 or more layers, etc etc.I just thought (in my head), it was just some relatively 'simple' electrolysis, copper depositing method.I watched most of it, but it was too long for me to watch it all, and from what I saw, I appreciated how much harder and sophisticated, modern day PCB fabrication has become.
Fab House(s) w/ PCB Orthotropic & Mechanical Properties Data - Page 1
Forum section: electronics / general

author: Mecanix
author_rank: Frequent Contributor
timestamp: February 19, 2021, 02:54:11 pm
content: Bit of a long shot but any of you fine engineers know of a PCB fab house who holds on orthotropic & mechanical properties data of the materials they sell?By any means, do advertise the one you use and why, that'd be quite helpful... potentially making this supplier (and data) research much easier tooThanksBackground: gearing up for adv. prototyping & simulation for mid-spring and currently looking for a supplier(s) who perform characterization of the materials they mfg with and sell.
Dump question on PCB rules - Page 1
Forum section: electronics / general

author: vaualbus
author_rank: Frequent Contributor
timestamp: February 11, 2021, 02:40:40 pm
content: I know the following question is really dump but really I run put of idea. What is the rule in altium that control and disable the exposed copper on the outer part of the via?I always done board and never had problems than suddenly on the last version of the board I produce this exposed copper appear and basically make the board impossible to solder as the same things happen also on pad and vias.I guess some of my rule have changed somehow but I really have no idea on what happened, maybe and update of altium broke something?Thanks for the helpAlberto

author: martin1454
author_rank: Regular Contributor
timestamp: February 11, 2021, 02:46:25 pm
content: Tenting - the checkbox is "Tented"Its not always set in rules, but just when you place it - When you have your via menu, check the tented box before placing the VIA, and then the following VIA's shoud be tented

author: vaualbus
author_rank: Frequent Contributor
timestamp: February 11, 2021, 02:49:50 pm
content: So I need to go through all the board via basically and set that property?Thanks anyway

author: martin1454
author_rank: Regular Contributor
timestamp: February 17, 2021, 01:11:02 pm
content: Quote from: vaualbus on February 11, 2021, 02:49:50 pmA bit late - But normally I just use the query to select all VIA's and then enable tenting
Recomendations for a PCB fab that can do conformal coating - Page 1
Forum section: electronics / general

author: DanielSkevington
author_rank: Newbie
timestamp: February 13, 2021, 01:35:24 pm
content: Hi,I've searched back through a couple of years of posts but have not found this being discussed. I want to get some boards made for a capacitive touch interface - the board is simply the touch pads for a UI on the front with an SMD header on the rear for connection to a main processor board, and is fairly small, 105 x114mm. I would like exposed pads on the touch PCB to be what the user sees - I do not want to put an overlay on top or cover the pads with solder mask, so the front side of the board will need to be coated - I would like to avoid doing this myself as I don't really have the space/facilities for any messy processes, and since this will be user facing I would like the coating to be done by someone who can produce a high quality finish, dust free etc.As ever - short run, probably 10 prototypes initially, maybe 50 or 100 boards down the road. Does anyone have any experience of having this kind of thing done by any of the usual prototype fabs? Alternately I would be happy to send the boards somewhere in the UK to have the coating done after I've received them. The header will be fitted as part of final assembly so coating should be on the front side only, which means dipping is out of the question I think. If anyone has recommendations based on first hand experience, I would like to hear them.Thank you,Daniel

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: February 13, 2021, 02:37:10 pm
content: We are about to do this in Shenzhen through a PCBA company called Shenzhen Eastwin. We had to do this to pass some ATEX requirement. We had to specifically specify the part number of the coating but if it is for normal usage, they should have them in stock readily available. I have been using them for many years for mass production but this will be the first for us.

author: penfold
author_rank: Frequent Contributor
timestamp: February 13, 2021, 05:14:54 pm
content: Quote from: DanielSkevington on February 13, 2021, 01:35:24 pmYou can have areas masked off prior to applicationhttps://www.pcbtrain.co.uk/aka Newbury Electronics did a few for me (I can't remember the prices, but it wasn't ridiculous in low volumes), its always a good idea to give them a call and discuss your options especially if you need a specific dielectric strength or abrasion resistance for something people will touch

author: NSA
author_rank: Contributor
timestamp: February 14, 2021, 08:59:35 pm
content: Clintonconnections.co.uk
Circuit Labs and PCB Zone Service Suspended - Page 1
Forum section: electronics / general

author: 48X24X48X
author_rank: Frequent Contributor
timestamp: February 23, 2021, 01:20:01 am
content: I received an email from them today saying their service is suspended and factory will be relocated with new owners. No firm date is given when they restart the service again.

author: Dubbie
author_rank: Unknown
timestamp: February 23, 2021, 01:23:22 am
content: I wonder if they will ever come back, or if China has killed them.I only use them when I need really fast turnaround.

author: ANTALIFE
author_rank: Frequent Contributor
timestamp: February 23, 2021, 02:49:39 am
content: Yea got same email today, sucks because they were our go to board house for prototypesAny news on who the new owners are?
Any one own a TVM925 on this board? I'd love to hear your opinion.  - Page 1
Forum section: electronics / general

author: allegroagitato
author_rank: Newbie
timestamp: March 14, 2019, 09:33:41 am
content: Hi All,Subject is pretty self explanatory. Does any one own a TVM925 on this board? I'd love to hear your opinion.with kind regards,Thomas

author: devonnije
author_rank: Contributor
timestamp: February 10, 2021, 10:30:53 am
content: Got a 2020 TVM926 (I'm not happy)Buddy has a 925, and making good use of it.Edit: bit happier now I found the problem.
Rapid Feeder - A new type of SMT feeder - Page 1
Forum section: electronics / general

author: shai
author_rank: Contributor
timestamp: February 08, 2021, 10:06:16 pm
content: Thought I would share a project we've been working on at Deltaprintr that will soon be available to those building their own PNP machines. If advertising isn't allowed here, please let me know.Seeing how there's a good variety of feeders on the market, most which cost over $100, we've decided to design a lower cost feeder that can interface with any machine and is well documented. It's geared towards being used with OpenPNP and the software already has the Rapid Feeder feature incorporated into it to try out for those that have OpenPNP. The biggest takeaway is that the Rapid Feeder is only 2mm wider than the tape it feeds. So if you're feeding 8mm tape, you'd use a 10mm wide feeder. This allows you to stack many feeders close together. In addition, there's no need for dedicated feeder banks for different widths because the feeders mount onto two 10mm OD linear rods and snap in. So you can mount them anywhere along the length of the rods without any gaps.Some specs on the feeder:Minimum component recommended: 0603 (but we think it can do 0402, still waiting on some more production parts to test this)Minimum tape pitch: 2mmUses QR UUID codes to identify feeders - no need to manually populate feeders in OpenPNP. Just scan with camera and it loads all of them.Runs on RS485Injection molded and stamped parts. (some stamping tooling we've already brought up to make components of the feeder:https://youtu.be/uvOQGHKV0vsIf anyone would like to see how the project started and is progressing, feel free to check out the OpenPNP thread here:https://groups.google.com/g/openpnp/c/tHkY0duicdI/m/99CWASUgAgAJMore specs, drawings and a 3D CAD STEP model download available on our website:https://www.deltaprintr.com/product/rapid-feeder/If you have any questions about features, etc. feel free to ask! We're about to open tooling for the injection molded parts after CNY and hope to start shipping mid-end April.
PCBWay - CNC, sheet metal, 3D printing - Page 1
Forum section: electronics / general

author: olkipukki
author_rank: Frequent Contributor
timestamp: January 26, 2021, 12:55:49 pm
content: I noticed that PCBWay provides <subj>Did somebody has used their service?https://www.pcbway.com/rapid-prototyping/

author: S. Petrukhin
author_rank: Super Contributor
timestamp: January 30, 2021, 07:59:43 pm
content: I wonder how much it costs...

author: NorthGuy
author_rank: Super Contributor
timestamp: February 02, 2021, 02:39:26 pm
content: Expensive.I quoted a very small and simple project. The quoted price was nearly twice the price I received for the same project from Alibaba suppliers.

author: SMTech
author_rank: Frequent Contributor
timestamp: February 02, 2021, 03:50:32 pm
content: Quote from: NorthGuy on February 02, 2021, 02:39:26 pmI'm not sure comparing it to some random on Ali makes it expensive, most of us know exactly who PCBway are, mostly have a level of expectation as to the service and communication we would get. On Ali, I couldn't tell you if a machine service was even going to exist next week or was a even a machining company not a broker sending it to the cheapest service they can find. How did your PCBway compare to a Canadian supplier local to you, that would be the question?

author: NorthGuy
author_rank: Super Contributor
timestamp: February 02, 2021, 05:12:17 pm
content: Quote from: SMTech on February 02, 2021, 03:50:32 pmMany of Canadian suppliers will also be brokers and the product will be actually made in China.In PCB production, Canadian supplier Bittele (with production in China) are much more expensive than PCBWay with quality similar to PCBWay. Direct orders from China give you better prices. You can go to PCBShopper and compare prices. PCBWay is more expensive than some others (such as JLCPCB), but they provide better quality and excellent customer service, so even with higher prices, it is worth it.There's no PCBShopper service for CNC milling where you could compare prices from dozens of companies, so it's harder to judge. The only way is to submit the same order to different suppliers and compare prices. So I did. PCBWay came out substantially more expensive. As with the PCBShopper service, this certainly doesn't say anything about quality. I could have placed actual orders and compare the quality, but I don't want to waste money on such experiments. You can do it if you wish. Until then, you don't have any ground to bash the suppliers you know nothing about.
Can someone pleas help me find the enclosure I am looking for. - Page 1
Forum section: electronics / general

author: eliaselof
author_rank: Newbie
timestamp: January 26, 2021, 08:12:12 pm
content: Does anyone know where I can find a box like like the one in the picture (without the PCB of course) preferably on AliExpress. I have tried searching for myself but haven’t been able to find any, with a slot for the PCB to stick out of.I.E something like this:https://se.rs-online.com/web/p/general-purpose-enclosures/1533701

author: up8051
author_rank: Frequent Contributor
timestamp: January 27, 2021, 04:17:10 pm
content: Look at the offer of two Polish manufacturers:www.maszczyk.plwww.kradex.com.pl