Where to find - small quanties of 5.1k resistors?

amishbill · 2019-10-29T21:22:19.000Z

You know - sometimes it takes a friend with a firm boot to the head to remind you to stop being stupid.

I didn’t check ebay because in general, I don’t like that place anymore. Even better, There are two Fry’s within a reasonable weekend drive of my house, and I DRIVE BY A MICROCENTER on my way home at least a few days a week.

Argh…. On the upside, according to their website, Microcenter doesn’t have 5.1k resistors. They have 4.7k and 5.6k, but I don’t feel like jury-rigging a series/parallel system to get what I want. Besides space issues, I don’t want another bodged variable in this experiment.

moderator007 · 2019-10-29T22:09:17.000Z

If you can make a order of $50 bucks then Arrow electronics does 1 day free shipping.
They have a decent selection of leds which help to make the $50 bucks for free shipping.
90 cri LH351D 5000k they have a good selection of cree’s also.
https://www.arrow.com/en/products/sphwhtl3da0gf4rts6/samsung-electronics

amishbill · 2019-10-29T22:15:44.000Z

moderator007:

If you can make a order of $50 bucks then Arrow electronics does 1 day free shipping.
They have a decent selection of leds which help to make the $50 bucks for free shipping.
90 cri LH351D 5000k they have a good selection of cree’s also.
https://www.arrow.com/en/products/sphwhtl3da0gf4rts6/samsung-electronics

That’s tempting, as I have an SST 4000k MF01 Mini that has an absolutely horrid Kermit/Oscar tint to it.
But, first I have to get into emitter swaps and complex board reflows…

iamlucky13 · 2019-10-29T22:50:20.000Z

If you do occasional projects, I’d get a variety pack of resistors to keep on-hand. I’m sure Amazon has them, and if there is a Fry’s electronics near Atlanta, they probably will, too.

Lexel · 2019-10-29T22:57:52.000Z

Why not simply use a thorough hole one, probably easier to solder than wire+smd

moderator007 · 2019-10-30T01:19:33.000Z

If you don’t mind waiting a few days or maybe for future projects, I have ordered a few things from here.
https://www.taydaelectronics.com/resistors/smd-chip-resistors/0805.html
They offer express shipping, $11 bucks I think. You can get several different values to try or possible other parts for future projects.
For some reason I have had orders that have shipped from the US that only took 3 days to get to me. I think they may have a small warehouse in the US but probably depends on what you order. If I remember correctly it shipped from New Jersey.
Digikey usually isn’t to bad with small orders shipping to me in a few days.
I would just try to find the resistors you need now local and put a order in for some of these in the size you prefer for future projects, maybe even two or three different sizes. Their cheap enough and next time you’ll have what you need on hand, at least that’s the idea.
https://www.aliexpress.com/wholesale?catId=0&initiative_id=AS_20191029165710&SearchText=smd+resistor+assorted
I went with the 170 values so hopefully I had about everthing I would ever need.
https://www.aliexpress.com/wholesale

Lightbringer · 2019-10-30T01:23:51.000Z

Why’s it have to be 5.1k and not 4.7k or 5.6k?

±10% is common.

MNLegoBoy · 2019-10-30T01:52:21.000Z

Lightbringer:

Why’s it have to be 5.1k and not 4.7k or 5.6k?

±10% is common.

USB C standards or something like that, also then the 4.7k and 5.6k have a ±%10, so down to 4.3k and up to 6.1k depending on which you use

amishbill · 2019-10-30T01:53:12.000Z

At the moment, this USB-C port modification experiment is all I’m really interested in. I’m not sure what else I’d do with a bulk set.

I have no doubt that standard through-hole will be the simplest answer. I’m both curious and stubborn though, and have several SP36 to try this mod on. More importantly, I am in line for several LT1 that I’ll want to mod.

Hmmm… Mouser - $1 in product, $7.99 shipping.
Digikey - $0.72 in product, can’t tell about shipping
Jameco - $0.60 in product, $5 annoyance fee, unknown shipping
Ebay is looking better and better.

MNLegoBoy · 2019-10-30T01:57:45.000Z

I might have some through hole that I could probably send in just a letter envelope with a stamp or 2

amishbill · 2019-10-30T02:09:35.000Z

MNLegoBoy:

I might have some through hole that I could probably send in just a letter envelope with a stamp or 2

I appreciate the thought, but there’s no way I could make it worth your effort for as little as I can get 20 or 100 from ebay.

ebay - 20 for $1.55 or 100 for $3.49, both shipped from the US.

MNLegoBoy · 2019-10-30T02:18:13.000Z

amishbill:

MNLegoBoy:

I might have some through hole that I could probably send in just a letter envelope with a stamp or 2

I appreciate the thought, but there’s no way I could make it worth your effort for as little as I can get 20 or 100 from ebay.

ebay - 20 for $1.55 or 100 for $3.49, both shipped from the US.

If that’s what you want to do that’s ok the offer still stands though I currently have 10 that maybe I’ll give to others if they want to do a similar mod

amishbill · 2019-10-30T02:32:36.000Z

MNLegoBoy:

amishbill:

MNLegoBoy:

I might have some through hole that I could probably send in just a letter envelope with a stamp or 2

I appreciate the thought, but there’s no way I could make it worth your effort for as little as I can get 20 or 100 from ebay.

ebay - 20 for $1.55 or 100 for $3.49, both shipped from the US.

If that’s what you want to do that’s ok the offer still stands though I currently have 10 that maybe I’ll give to others if they want to do a similar mod

I do appreciate the offer.
Thank.

Hey! Ebay just gave me a $10 off coupon, so I can get 100 for free, and still get $6 off something else. :+1:
Between the two of us, I think we’ll be able to supply a few folks with 5.1k resistors.

Joshk · 2019-10-30T04:20:44.000Z

Maybe you could keep some precision trim pots on hand? I am starting to do this, and it’s been more useful than my box of resistors.

Lexel · 2019-10-30T11:35:04.000Z

on SMD resistors 1 and 5% are common
I usually get only 1%

10% resistors are just crap

Photonica · 2019-10-30T12:46:57.000Z

Looks like you found Amazon. I was also going to suggest Microcenter and Fry’s. Marietta Microcenter only has 3 in stock, but if you order online they usually come in in 3-4 days tops. It might be worth ordering a starter kit if you’re going to be doing much. I’ve found “number of pieces” isn’t as important as “number of different values”.

amishbill · 2019-10-30T13:49:37.000Z

I checked out both local options, and neither of them had 5.1k listed online. Even the bulk packs at Microcenter seemed to skip that value. I can stop by and double check, but when ebay is willing to give them to me for free, well, it’s hard to pass that up.

The free ebay’s are through-hole. I need to go back and check for SMD. Can’t play with what you don’t have.

contactcr · 2019-10-30T14:01:33.000Z

DigiKey shipping is $5 and they ship the same day. It will likely take 2 days to arrive with even the cheapest shipping (1st class). IDK why you didn’t bother to take the time to check out.

amishbill · 2019-10-30T14:21:07.000Z

contactcr:

DigiKey shipping is $5 and they ship the same day. It will likely take 2 days to arrive with even the cheapest shipping (1st class). IDK why you didn’t bother to take the time to check out.

I have accounts at none of the suppliers mentioned. I’m not going to bother setting up accounts with every place I visit just to get full quotes w/ shipping on $1 worth of product.

Lightbringer · 2019-10-30T15:54:16.000Z

amishbill:

I checked out both local options, and neither of them had 5.1k listed online. Even the bulk packs at Microcenter seemed to skip that value.

That’s an odd/uncommon value. 4.7k was the de facto TTL pullup resistor since Jesus graduated from MIT, and 5.6k was the typical next step up. It’s a perfectly standard value, but just not very commonly used… ’til usb-c.