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  • Buying Electronic Components


    Hey, I am new to the forum and this is my first post.Just saying

    I am currently invested in learning more about embedded systems with the Atmel AVR microcontroller and GCC-C programming. Now I am looking to purchase some electronic components for projects. I am looking for advice on where you guys buy your electronic components? I was thinking eBay but I have heard some stories of the quality being poor, is this the case? Or is it more reliable and just as inexpensive buying them from other online stores?

    Where do you buy your components... also especially if you want to buy an initial array of components like kits and stuff? P.S I am UK based.

    Information and advice would be appreciated.

  • #2
    Welcome to ALL ABOUT CIRCUITS!
    Please tell us your location, that will affect your places to get parts.
    I use the following as I am located in USA: Jameco, Mouser, Digikey,Newark,Allied Electronics, All electronics, and possibly some more.
    Again welcome to this forum.

    Comment


    • #3

      I have been doing electronics at home (and at work) for many years so I have a good stock of common components. As you continue in electronics you will no doubt also build a collection. Initially I would suggest you buy just the components you need for your current project. I got to know the sort of components I often used in projects and when I was buying, if the project required 3 of some component I used often, then I ordered 10. And so the stock built.

      I am in the UK and I used to buy from Maplin, Rapid, RS, and Farnell, but they have minimum order or large P&P charges, so now I mostly buy through ebay. I have had very few problems. I take notice of the sellers rating and I have found some sellers who stock 'my kind' of components and have given me good service, so I favour them.

      Comment


      • #4
        Originally posted by Louiscuming View Post
        Hey, I am new to the forum and this is my first post.Just saying

        I am currently invested in learning more about embedded systems with the Atmel AVR microcontroller and GCC-C programming. Now I am looking to purchase some electronic components for projects. I am looking for advice on where you guys buy your electronic components? I was thinking eBay but I have heard some stories of the quality being poor, is this the case? Or is it more reliable and just as inexpensive buying them from other online stores?

        Where do you buy your components... also especially if you want to buy an initial array of components like kits and stuff? P.S I am UK based.

        Information and advice would be appreciated.

        Ahh.....such a question.
        As early as 20 years ago, the venerable ARRL Handbook stated that the present day amateur needed to be his own parts procurement department.
        To answer your question concisely.....all of the above.
        I've been collecting parts for 40 years from every imaginable source...and some unimaginable ones.

        Eric the Eclectic Electric

        Comment


        • #5

          Look everywhere, and find what you need at a price you can justify. I purchase parts from 70 different countries. Everything from 2.2" TFT LCDs to resistors. Pay absolutely as little as you can for resistors, LEDs, capacitors. But be warned-- it's easy to build up a small warehouse of parts-- be sure this is what you want to do long term (passion), or you may wind up with a small treasure of tens of thousands of componentsSometimes, buying some parts in higher quantities will pay off-- LEDs, resistors, caps, etc.

          Comment


          • #6
            Originally posted by Louiscuming View Post
            Hey, I am new to the forum and this is my first post.Just saying

            I am currently invested in learning more about embedded systems with the Atmel AVR microcontroller and GCC-C programming. Now I am looking to purchase some electronic components for projects. I am looking for advice on where you guys buy your electronic components? I was thinking eBay but I have heard some stories of the quality being poor, is this the case? Or is it more reliable and just as inexpensive buying them from other online stores?

            Where do you buy your components... also especially if you want to buy an initial array of components like kits and stuff? P.S I am UK based.

            Information and advice would be appreciated.

            Buy from reputable sources. eBay is okay, but stay away from people who sell lots of inexpensive parts and instead buy from Sellers who seem to have acquired an odd lot. Even the people who buy in quantity and repackage are unaware, or ignorant, of the fact that they're sometimes buying counterfeit or rejected parts.

            Places like Newark guarantee the parts they sell are authentic.

            Buy any parts you need for projects in quantity 100 or more. Over time, you'll build up stock of parts that you have actually used. Resistor and capacitor kits are probably an exceptional case where buying before you need is okay.

            If you were in the US, I'd offer to barter parts with you. Over the years, I've purchased full reels of components to get a good price and I have many parts to trade for something more useful. Perhaps there are individuals in a similar situation in your area.

            Whatever you buy, if the price seems too good to be true, it probably is. I buy things from AliExpress and Banggood knowing that they're likely low quality and/or counterfeit. I buy a small lot and decide if it's worth buying more. I recently did this for some wire jumpers with male/female header connectors on them. For less then US$3, I got 120 20cm jumpers for less than it would cost me for the wire. The quality isn't great, but for the price I can't complain.

            Comment


            • #7

              GC are pretty decent, fully professional, you always get a tracking number on larger orders.

              i always got my orders. A few times things were missing, or shipped less than paid for, but always minor. One time I got a refund, another time I got it reshipped, another time I just didnt want to enquire about it.

              MOSFETs, well, there are several kinds, I have seen one kind with brittle legs, so inferior amalgam was used perhaps some recycled copper with impurities. It doesnt matter just breaks off more easily, when you bend them in any kind.

              Also MOSFETs always have the problem if you work them at the margin very hot, sooner or later some will explode. I dont recommend more than 70C outer temperature measured.

              Comment


              • #8
                I have purchased several batches of Mosfets from China. Twice I received counterfeit parts. Example: I ordered IRF1404 mosfets that should have a 0.004 ohm Ron resistance. The parts I received had >0.025 ohm Ron resistance. I found I had more success if I email them first asking about the part I was interested in and that I would test the Ron value. Some did not respond back, the ones that did respond and assured me the parts were genuine, and they delivered good parts. The Chinese do not want negative feedback.

                Comment


                • #9

                  I buy regularly on ebay from China; but I would not recommend it if you are looking for quality or are in a hurry. Orders usually take about a month to arrive -though I just received an order last week that I placed in June- and a very small percentage get lost in the post; but you won't have problems getting a refund.

                  Apart from that, everything else was fine; except for an IC they sent me that was not up to specs... probably a counterfeit.

                  Comment


                  • #10
                    Originally posted by Nancystarkman View Post
                    I buy regularly on ebay from China; but I would not recommend it if you are looking for quality or are in a hurry. Orders usually take about a month to arrive -though I just received an order last week that I placed in June- and a very small percentage get lost in the post; but you won't have problems getting a refund.

                    Apart from that, everything else was fine; except for an IC they sent me that was not up to specs... probably a counterfeit.

                    They arent limited to 8 Amps but at this current, fairly thick cable already heats up considerably.

                    Also consider the MOSFET isnt always continously fully "on", so the average resistance is higher. Depends if you switch slow, or very fast. Well sure you can approach the margins, but you'll see with cheap parts, they'll blow up sometimes before the margin is fully exercized.

                    Bonding wire costs money, after all, good 100% copper is more expensive too.

                    Great idea isnt it? Use unrefined copper from recycling which has impurities- and costs much less.

                    Comment


                    • #11

                      I buy electronic components from ebay all the time. You will save soooo much on shipping that it simply does not matter if you should ever
                      buy from the wrong guy and get ripped off. You have saved so much money over time it doesn't matter.

                      I tend to just use common sense. If the auction store has been established and has lots of components and lots of sales in the past
                      then I have no problem buying from them. These things are soooo cheap who cares if one accidently buys from a vendor that
                      does not act reputably.

                      If they can ship 10 diodes clear from China (halfway around the world) for free then companies in the U.S. actually could do the same
                      or a rather minimal charge. $4.95 shipping for super light parts doesn't cut it.

                      Comment

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