Jumper Wire Pin for 20AWG Wire - Page 1
Forum section: electronics / general

author: cortes
author_rank: Contributor
timestamp: July 03, 2022, 12:28:29 am
content: I bought a cheap set of test hook to male jumper wire leads. I got what I paid for. They work, but seem like they would break if you looked at them wrong.So I had this brilliant idea of buying some Pomona single ended mini-grabbers and then crimping a pin on to the open end. I got a set of Dupont pins and connectors from Amazon. I could just squeeze the wire into the pin and crimp it. The problem is that the wire insulation is too big to fit into the pin shield. The connectors were made for narrower gauge wire.I checked to see if they made any for 20AWG and HT-73 showed up in a few images, but I can't find anyone the sells them. I could strip the wire farther back and double crimp it. That seems like poor practice to me.Any way, my question is: are there any pins that I can insert into a breadboard that will take 20AWG and have a shield?

author: tooki
author_rank: Super Contributor
timestamp: July 03, 2022, 03:23:35 pm
content: By “shield” I assume you mean the black connector housings. (I’d STRONGLY avoid using the word “shield” for those, because in electronics, shielding has a very specific meaning that is not this one!)1. The crimp tools included in cheap DuPont sets, like 99% of cheap crimp tools sold expressly for DuPont crimping, aren’t actually suitable for crimping them properly. So when pressed to (or beyond) the limits of the wire size they’re designed for, you end up with a mess that won’t enter the housing. Seehttps://www.eevblog.com/forum/reviews/affordable-crimp-tools-for-small-connectors-(dupont-etc-)/and the resources linked in the first post.2. The “real” DuPont connectors (Amphenol Mini-PV) make contacts for all the way up to 18AWG. (Male for 18-20AWG is part 47793. But good luck finding one in stock anywhere…)3. Some old Pomona minigrabber leads used thin wire, much thinner than today. Unfortunately they did not change the part number, so there’s no way to search for them specifically.4. What I use now are Hirschmann KLEPS 3ST and Micro KLEPS, which have a male DuPont pin to which you then plug in whatever lead you need at the moment. I’ve made up a bunch of DuPont jumpers of various configurations using 24AWG silicone wire.

author: cortes
author_rank: Contributor
timestamp: July 03, 2022, 04:57:43 pm
content: Quote from: tooki on July 03, 2022, 03:23:35 pmThanks. I missed that oneQuoteIt didn't come with a crimp tool. I used an Engineer PAD-02. I have some solid 20AWG wire that is a better fit. I'm going to try to crimp in a short tail and then solder on to that if I can't find another alternative.

author: tooki
author_rank: Super Contributor
timestamp: July 04, 2022, 02:17:11 am
content: Unfortunately, none of its 3 die sets has a circular insulation crimp, so there’s no way it can produce a good result with DuPont contacts. See the aforementioned link.You seem fixated on the wire gauge, which I suspect isn’t the problem. (I suspect more the crimp and the insulation thickness.) Perhaps you could take some photos of the problem?

author: jpanhalt
author_rank: Super Contributor
timestamp: July 04, 2022, 02:27:35 am
content: It would help enormously if the TS would give a link to what he is using or planning to use. Otherwise, it's a pure guess.The grabbers I use have a small pin it the top. I just attach a single Berg-like female connector to my wire, and it fits that pin. I put heat shrink on the connector and the hole is large enough to accommodate that.

author: tooki
author_rank: Super Contributor
timestamp: July 04, 2022, 08:54:52 am
content: Quote from: jpanhalt on July 04, 2022, 02:27:35 amI've made some leads precisely that way!

author: cortes
author_rank: Contributor
timestamp: July 04, 2022, 04:24:39 pm
content: Quote from: jpanhalt on July 04, 2022, 02:27:35 amI'm guessing TS means topic starter or something similar. I'm used to OP for original poster.Themouser listingfor the item shows an incorrect image. In the description you will see "Minigrabber Clip One End Only". What I received is a 60" wire with a mini grabber on one end.I did find apin connectoron the mouser site for 20-24AWG wire. The data sheet doesn't give dimensions for the pin. Assuming it's to scale, it looks to be under 0.81mm or 0.032 inches, which is the maximum specified by 3M for the board. I can't find a single pin housing for it so I'm thinking I could crimp down everything but the pin and put shrink wrap tubing over it.Pomona does make a pin tip plug (51732). The tip is far too big for a breadboard. They have anotherpin tip jackthat has the right pin size. It seems like overkill for a breadboard plug. The data sheet show details for a panel cut out so I assume they are mounted to a panel. It also looks like it's for doing wire wrap.There's also a bananaplug adaptorthat has a 22 AWG, which is 0.03 inches or 0.76mm. The problem is that you have to buy a whole set of different sizes and I would need eight sets. I'd also have to get banana plugs to add to my wires.

author: tooki
author_rank: Super Contributor
timestamp: July 04, 2022, 06:15:06 pm
content: Quote from: cortes on July 04, 2022, 04:24:39 pmIt’s a micro Mate n Lok, it’s a multipin connector series. Very, very few series have single pin housings.Anyhow, if you’re going to go with a heat shrink solution, look at the TE Micro Quad Lock pins. MQL is an automotive connector, so it’s extremely robust: every bit of folded metal in the contact body is welded, as is the solid 0.025” square pin.With that said, much of this discussion is now overlapping very significantly with this other ongoing thread:https://www.eevblog.com/forum/projects/breadboard-test-leads/Quote from: cortes on July 04, 2022, 04:24:39 pmLOL what? Where’d you get that idea? You absolutely do not have to buy the set. Just look for Pomona 4691. Mouser and Digi-Key each have hundreds of them in stock.With that said, they’re OK for breadboarding but not great. A #22 contact is bigger than 22AWG, being somewhere between 20 and 21AWG, and I don’t really like putting things that big into a breadboard. It’s within datasheet limits, but IMHO stretches them out too much. Given their cost, I’d buy one or two to try out before committing. It’d be cheaper to buy the KLEPS 3ST I mention above and get DuPont jumpers for them…Finally — this is described in the thread linked above — the male D-Sub HD (and only HD!!!) pins are size #22, but with a torpedo shaped tip that’s easier to insert. Not sure if these exist for thicker wire though.

author: cortes
author_rank: Contributor
timestamp: July 05, 2022, 01:20:38 am
content: Quote from: tooki on July 04, 2022, 06:15:06 pmThere was a section in the data sheet describing a collection. I missed seeing that it was a separate part numberQuoteThanks for the link to the other thread on the subject. You posted some great information. I've decided to solder on banana plugs and get some of the adaptors discussed above. I'll probably use them for other purposes.Like you, I desire to be able to plug the pins in next to each other so a Dupont connector or something of its size would be essential. I bought a set of Goupchn Mini Grabber Test Hooks to Breadboard Male Jumper Wires. As mentioned in my original post, they do the job. I'm spoiled by the quality of the Pomona and Fluke leads that I own thus the effort to make better ones. I like the leads you made with the Mini-PV contacts from Amphenol. I may do the same.

author: tooki
author_rank: Super Contributor
timestamp: July 05, 2022, 11:59:48 am
content: Just bear in mind that you really want to get a proper crimping tool for them. Like the Chinese clones, they really need a circular insulation crimp, and the conductor crimp on real mini-PV is intended to be crimped very narrow. Plus, at the price of real mini-PV, you don’t want to be wasting them on failed crimps with a bad tool. (Whereas the cheap clones are so cheap that one can afford a high reject rate.) Male clone pins are fine, but the females are just not good for repeated insertion cycles.

author: cortes
author_rank: Contributor
timestamp: July 05, 2022, 03:50:04 pm
content: Quote from: tooki on July 05, 2022, 11:59:48 amI have the Engineer PAD-2 set. Is that sufficient or do I need something dedicated to the type?UpdateAfter doing more research, it looks like the Hozan P-707 Open Barrel Crimper is a good choice. I can't find any rounded barrel options in the Engineer line.Also, in the other thread you mentionQuoteSearching around, I found agreat web pageon the subject. He said he used the ultra-high type and gave a part numbershown here on mouser.com. Is that the one you use?

author: tooki
author_rank: Super Contributor
timestamp: July 07, 2022, 05:32:07 am
content: Matt’s website is literally listed in the first post of the thread I linked to earlier:https://www.eevblog.com/forum/reviews/affordable-crimp-tools-for-small-connectors-(dupont-etc-)/I have 47745-001LF. The 48257-000LF you linked to is the same thing with different plating. There are at least 5 different plating options, any of which I would take over a clone contact. (For reusable test leads that is. For a cable that’s going to be plugged in and left there inside a device, the clones are fine.)