Arduino Forum

Forum 2005-2010 (read only) => General => Frequently-Asked Questions => Topic started by: BenitoIsAwesomr on Jul 23, 2010, 12:13 am

Title: Buying components from eBay?
Post by: BenitoIsAwesomr on Jul 23, 2010, 12:13 am
How bad an idea is it to buy things like potentiometers and LED's from eBay?
Title: Re: Buying components from eBay?
Post by: keeper63 on Jul 23, 2010, 01:29 am
I've never bought potentiometers, but I did buy a batch of white LEDs from a guy who goes by the name "Asia Engineer"; he shipped quick, and had good communication, and his prices were fair. The product was as described, and the LEDs work fine.
Title: Re: Buying components from eBay?
Post by: SeanJ on Jul 23, 2010, 01:31 am
It could be okay.  I've got some stuff from eBay coming from Taiwan or China, which they weren't working properly, and I've got stuff that worked perfectly fine.  I would'd buy anything expensive.  Pots and LEDs should be very cheap, if they don't work, it wouldn't be a big loss.
Title: Re: Buying components from eBay?
Post by: retrolefty on Jul 23, 2010, 01:46 am
I've bought lots of bulk components from Asian E-bay sellers, not a problem and there are some real deals to be had with careful shopping. As always check the sellers feedback, check what their main line of listings are, check number of transactions, etc. You should be fine.

Lefty

Title: Re: Buying components from eBay?
Post by: eyekanspele on Jul 23, 2010, 05:49 am
One thing to note, eBay listinfs of LED's with included resistors are not always the greatest. I purchased a bulk order of LED's which came with resistors, and the resistors were not what they were suppose to be. The color coded bands were not accurately reflecting the actual amount of ohms they were suppose to impede, about 2% of the resistors were off by around 25% (above and below) which sometimes led to dim led's and some led's that burnt out quickly.

Just be sure to test the resistors with a multimeter you trust.

I wasn't completely mad though... it was about 5 dollars for 100 UV led's with resistors  ;D
Title: Re: Buying components from eBay?
Post by: BenitoIsAwesomr on Jul 23, 2010, 08:19 am
Alright, I was gonna buy a bunch of stuff in bulk! Sounds like its not a terrible idea!
So what about the Arduinos that are sold super cheap, Ive heard they are fake?
Title: Re: Buying components from eBay?
Post by: mowcius on Jul 23, 2010, 11:26 am
Quote
So what about the Arduinos that are sold super cheap, Ive heard they are fake?

You have heard correctly. Don't buy Arduino boards from ebay...

I have also purchased shift registers, LCDs, LEDs etc off ebay without ever having an issue.

Mowcius
Title: Re: Buying components from eBay?
Post by: cowjam on Jul 23, 2010, 03:16 pm
I've bought a few bags off stuff off ebay, all seemed fine.

Sure electronics have their own ebay shop, unsurprisingly it's the cheapest I've found their matrix displays and I got a load of RGB LEDs too.
Title: Re: Buying components from eBay?
Post by: tkj on Jul 23, 2010, 03:25 pm
I've bought a lot of electronics components and modules on eBay without problems...
I've bought everything from simple components and IC's to FPGA board and to larger development boards.

Sure Electronics is a good seller, I've used him/them a couple of times. I can also recommend WideHK!

Thomas
Title: Re: Buying components from eBay?
Post by: BenitoIsAwesomr on Jul 23, 2010, 04:58 pm
Not what I expected! I'll definitely be checking some of these sellers out, thanks!
Anyone ever use an Arduino clone from here?
http://www.earthshineelectronics.com/
Title: Re: Buying components from eBay?
Post by: keeper63 on Jul 23, 2010, 05:24 pm
Quote
Anyone ever use an Arduino clone from here?


I don't think I would have a problem with an Earthshine device; they have provided the community with one of the best "beginners guides" to the Arduino I have seen so far (for free online!) - as well as as a starter kit that goes with it (you pay for the kit, of course) that includes parts and such to complete the "course" in the guide and learn about how to properly use the Arduino.

:)
Title: Re: Buying components from eBay?
Post by: BenitoIsAwesomr on Jul 23, 2010, 06:08 pm
Sweet Jesus! Thats an awesome starter kit.
Title: Re: Buying components from eBay?
Post by: Mr._Swarf on Jul 30, 2010, 06:16 am
So far all the cheap parts I've bought off Asian FeeBay sellers have been good with the exception of a DVI to VGA adapter for my PowerBook.

I'm pretty poor these days. As much as I hate to send my money to non-US vendors the few pennies I have need to get me maximum yield. Thus far the dirt cheap stuff off eBay has been mostly OK.
Title: Re: Buying components from eBay?
Post by: alansmk on Jul 30, 2010, 07:45 am
so far, I've bought all my components online, except some less-common stuff and the ATMega324 with bootloader.
stuff like LED, resistors, wires, capacitor. pretty much like everything.

I even bought an arduino board off ebay. Everything seems to work fine.
I am not sure if it's fake. but i haven't run into any problem whatsoever yet, so good enough for me.

:D good luck!
Title: Re: Buying components from eBay?
Post by: alansmk on Jul 30, 2010, 07:47 am
o, a lot of ebay stuff are GREAT price. but shipping from Asian seller takes quite a LONG time (to U.S. anyway, sometimes a month-ish)

but that's just my experience
Title: Re: Buying components from eBay?
Post by: Funky Diver on Jul 30, 2010, 03:10 pm
I've bought stuff (in general) from China for years.  Never have I had a problem.  Recently, bought LEDs, LED matrix boards, and a few other odds n sods... the shipping on it was quicker than a guy that lives about 30 miles away from me on a first class post item (large letter size)
Title: Re: Buying components from eBay?
Post by: pluggy on Jul 31, 2010, 01:51 pm
Quote
I even bought an arduino board off ebay.


I personally guarantee its a fake. Unless its sold as 'compatible' which is a slightly different matter  :)

But there are fakes and fakes, some are as good a quality as a real one, some are utter crap.......

I buy stuff from China from Ebay all the time. Usually takes 2 or 3 weeks to arrive, but never had a problem
Title: Re: Buying components from eBay?
Post by: wellswang on Jul 31, 2010, 03:45 pm
:D I'm so lucky that I live in China and I can buy cheap parts easily from internet.  ;D ;D ;D
Title: Re: Buying components from eBay?
Post by: wortelsoft on Jul 31, 2010, 07:49 pm
I've bought lots of stuff from ebay HK sellers but also UK and Canadian sellers.

Haven't had any problems so far.

Title: Re: Buying components from eBay?
Post by: smspencer on Aug 02, 2010, 03:52 pm
My 2c worth on Earthshine is that the stuff I've bought from them is absolutely fine, and they're nice people to deal with. I believe the boards are DFRobotics ones, so not your usual knocked-off dodgy ones; certainly the DFRMega I have here is fine.

And Mike's starter guide is, as has been previously posted, an excellent one.
Title: Re: Buying components from eBay?
Post by: copiertalk on Aug 04, 2010, 07:04 pm
If I was trying to build the space shuttle I would probably not go with components off ebay.

If I am getting parts  for me just to make some LED's blink the ease of them comming to my door at an inexpesive cost is actually pretty cool even if it takes a couple of weeks. 8-)
Title: Re: Buying components from eBay?
Post by: UltraMagnus on Aug 04, 2010, 11:44 pm
I have bought loads of parts on ebay, from sellers in China, Hong Kong, Lithuania, France, Russia and even the USA and all have been fine.

Be careful with LEDs, the brightness is often over rated, or the seller will advertise the brightness you get for a few ms before the LED explodes  ;D
Title: Re: Buying components from eBay?
Post by: reiser4 on Aug 07, 2010, 12:45 pm
I buy lot of stuff from china. I never had a problem, the only requirement is patience. Here in Italy chinese packs usually take 2 to 3 weeks to come.
My last buy is a 130W TEC for a desk beer cooler, arduino controlled of course  ;D