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How to find parts when no exact match is found
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Pierre Demartines 5 years ago
Hello, I am quite new to EasyEDA. So far so good, it's great and intuitive! However, I keep having trouble with the "search part" phase. It seems that the search is mostly keyword-based. Is there some form of faceted search available? Can I search by package type, or by pitch, width and number of pins? When a specific part isn't in the library, is there a way to find by package type and component function? I have read several posts and documents, including: * [https://docs.easyeda.com/en/Schematic/Libraries/index.html](https://docs.easyeda.com/en/Schematic/Libraries/index.html), * [https://easyeda\.com/andyfierman/Welcome\_to\_EasyEDA\-31e1288f882e49e582699b8eb7fe9b1f](https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f), in particular 2.3 that leads to: * [https://docs.google.com/document/d/1ZRkPPMID68mBz9j9RMIJARNSXK12PDULZXP7kiThvDg](https://docs.google.com/document/d/1ZRkPPMID68mBz9j9RMIJARNSXK12PDULZXP7kiThvDg/edit) but I still don't understand the search phase itself and how to achieve better reuse of existing parts. Let's take a concrete example. I happen to have a quad resistor array from Digi-Key: [YC324J-2.2KCT-ND](https://www.digikey.com/product-detail/en/yageo/YC324-JK-072K2L/YC324J-2.2KCT-ND). That specific part is not currently found anywhere in the library. So, what are the next steps from there? I've tried at least a dozen search queries to try to get something similar and usable, but to no avail. How do I relax my search to find something that will work with minimal customization (perhaps a similar resistor array with same package dimension, possibly different resistance value)? How about starting with some generic package type (here: 8-pin, 2012, Convex, Long Side Terminals)? Otherwise, am I just encouraged to create a new part, specifically with that part number?  Given the plethora of parts out there, if everybody goes ahead and creates their own specific parts for what should be common ones, without composability of traits and characteristics, IMHO that severely reduces reuse and encourages entropy (a "zoo"). What am I missing?
Comments
Pablo Moreno 3 years ago
I have the same problem, **CD74HC4067M96 is a very common mux chip, but CD74HC4067M96G4 which is the same chip but larger is no where to be found at the database, so I am stuck..**
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andyfierman 3 years ago
@pm7091, You are referring to the same device in different packaging and therefore different footprints. See PACKAGING INFORMATION on Addendum page 1 in [https://www.ti.com/lit/ds/symlink/cd74hc4067.pdf](https://www.ti.com/lit/ds/symlink/cd74hc4067.pdf)<br> <br> If you can find a suitable symbol but in the wrong footprint: 1. Search the library for the footprint you want and make a note of it; 2. Place the symbol into the schematic; 3. Edit and update the Footprint attribute in the symbol using the Footprint Manager to assign the desired footprint to the symbol; Done. If you can find a suitable footprint but not the symbol then you can make your own symbol and assign the footprint to it. If you can find a suitable symbol but not the footprint then you can make your own footprint and assign that footprint to the symbol. For more please read the Tutorial. For more about symbols and footprints please read (2.3) in (2) in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)
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Markus_ee 3 years ago
Hi! You can also visit [LCSC site](https://lcsc.com/en) and see if there is a suitable component there. Then just type their part number (starts with C and a few numbers after that)to the component library search and see if there is a footprint available that way. ![image.png](//image.easyeda.com/pullimage/ixs9te90HTF7G8SLNgDSxla2Dv8Y6zuD5BVsOd9d.png) Regards, Markus Virtanen HW / Electronics Designer
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Pablo Moreno 3 years ago
@andyfierman. Very nice, thanks, I already buy 25 of them for a big project.
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Pablo Moreno 3 years ago
mean _bought.. sorry_
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bogus105 9 months ago
I have found part in LSCS library - C856772 (20 ohm chip resistor in 0805 package) but instead of "PLACE" option to place it in my schematic i can see "NO PART YET". It is in my basket already and there is stock available. So how to place it correctly so i can later use component placement on PCB option?
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haidy_easyeda 9 months ago
<font _mstmutation="1">@bogus105 </font><font _mstmutation="1">Hello, the component C856772 has not been plotted yet, so it is not available. I will submit a drawing request for this component for you, please re-search in 2 days to check.</font> <font _mstmutation="1"></font>
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bruizer 9 months ago
@haidy_easyeda would there be any chance to get the resistor [C2103821](https://www.lcsc.com/product-detail/Chip-Resistor-Surface-Mount_ROHM-Semicon-ESR03EZPF2200_C2103821.html) added as well? Apologies if this is inappropriate way to ask. I was searching for what to do when it says "No Part Yet" and stumbled upon this thread.
Reply
haidy_easyeda 9 months ago
@bruizer Hello, this is because the component is not yet mapped by us and therefore not available. I've already requested a new component for you and it will be done in about two working days, so please go back to the editor and search again in two days. If you still need to draw a new component, please check out this tutorial service: [Require New Part - EasyEDA](https://easyeda.com/page/apply-new-part)
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bruizer 9 months ago
@haidy_easyeda Thank you so much - and thanks for the link!
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