Problem with diode orientation?
82 15
Biophob 4 days ago
Hi, first time poster here. I don't get this situation. I put diodes in the schematic the right way, but the PCB keeps reversing it's orientation. Is it bug or I'm being stupid here? The pins of this socket are 100% correct. What is going on? ![obraz.png](//image.easyeda.com/pullimage/nuNOAWvDduBXscRo87w17oT0da8yymK2zARNJnOT.png)
Comments
Markus_ee 4 days ago
Hi Biophob! Is the current supposed to flow towards JP1(pin9&10) with D1? If that is the case, then your diode D1 is wrong way around in schematic, which means that D2 is also wrong way around. You have dual power supply. positive rail should be connected from anode to cathode going towards JP1. Negative rail should be connected from cathode to anode going towards JP1 assuming that JP1 is power output connector. Regards, Markus Virtanen HW / Electronics Designer
Reply
Biophob 4 days ago
Thank you for response. No, the JP1 supplies the device. It is dual supply with positive and negative voltages. But what I mean is the symbol of the diode is reversed on PCB compared to schematic. Here is example how it should look like and how it looks currently. The marking bar on a diode switched sides. Am i doing something wrong? ![obraz.png](//image.easyeda.com/pullimage/VoumAHmlBt1TMciD19MbNGXVDg98wwqMunLkGWpE.png)
Reply
Biophob 4 days ago
And the schematic is OK.![obraz.png](//image.easyeda.com/pullimage/GjbQkLOv7vWwordnEujuQ8YmrGiKWZLB99sW80Nh.png)
Reply
andyfierman 4 days ago
Select the Schematic Symbol for the device then click on the Footprint (a.k.a. package) attribute in the right hand panel. This will show you the pin mapping. Edit the symbol pin or the footprint pad numbering so that the symbol pins map onto the footprint pads in the correct order or orientation. Then click Update. Then close the Footprint Manager. If you use the right click Find Similar Objects... tool then you can select and edit all the diodes at once.
Reply
Biophob 4 days ago
Thank you @andyfierman, but it didn't change the orientation of diodes on PCB. Would be great to elliminate the cause of the disorder, not just the effect. It can make big problems. I don't get it, why is it happening? I'm lucky I have spotted this one.
Reply
andyfierman 4 days ago
@Biophob, Have you done **Update PCB...** or **Import Changes...** to pull the changes in the Schematic into the PCB?
Reply
andyfierman 4 days ago
"I'm lucky I have spotted this one." Not quite. Strictly, you should have found and corrected this error before you did **Convert to PCB...**. This is what the Essential Checklists (4) and (6) are for 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)
Reply
Biophob 4 days ago
This is nuts! What is happening? It looks like it treats the diode pinouts randomly! How to prevent it? Does it happen only for 2-pin elements? Or do I have to check EVERY COMPONENT i use? Even the ones with 3 pins or more? I dont have pinouts of every existing component in my head to check it every time. Besides, i have not found (4) or (6) in your link. It does not contain the words "essential" or "checklist" so I'm assuming you put the wrong link. ![obraz.png](//image.easyeda.com/pullimage/fqQwCtaogW1pGwES9GQi4FQmhTzzySoojg19RNUi.png)
Reply
andyfierman 4 days ago
@Biophob, Have you done the steps described above? * _Select the Schematic Symbol for the device then click on the Footprint (a.k.a. package) attribute in the right hand panel._ * _This will show you the pin mapping._ * _Edit the symbol pin or the footprint pad numbering so that the symbol pins map onto the footprint pads in the correct order or orientation._ * _Then click Update._ * _Then close the Footprint Manager._ * _If you use the right click Find Similar Objects... tool then you can select and edit all the diodes at once._ "Besides, i have not found (4) or (6) in your link. It does not contain the words "essential" or "checklist" so I'm assuming you put the wrong link." You have misread the instructions: _This is what the Essential Checklists (4) and (6) are for 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) You open the doucment in the link then you read it at least until you get to and open the link in this bit: ![image.png](//image.easyeda.com/pullimage/lHsgU5khxnfu6VmHD5ivpMeDX2Xmusxvv6I7UJEw.png) then you find: ![image.png](//image.easyeda.com/pullimage/LANE5UE8wETdgzi7iEvQF0lV5tBqPF9SS0rbITXV.png)
Reply
andyfierman 4 days ago
If you are using User Contributed parts then you **must** check them.
Reply
Markus_ee 4 days ago
@Biophob I do suggest using LCSC part numbers. That way you can be pretty sure that the cathodes and anodes are in the correct way. Using user contributed parts is always a risk if you don't check the component footprint. ![C78613.jpg](//image.easyeda.com/pullimage/PVgowvvU8OTrUyeeCbE3ljnljWEdAaY6GeE7MNhH.jpeg) Regards, Markus Virtanen HW / Electronics Designer
Reply
Biophob 4 days ago
All components were from the System library. And all of the diodes in the screen i put above. Sorry, I did not expect link inception. Scarcely your screen has an answer. Editing in Footprint Manager didn't swap the diode pinouts. Now i'm trying to find properly oriented diodes. I can't believe it. Thanks for your help. I am going to report all diodes with false footprints.
Reply
andyfierman 4 days ago
This part in the System library is wrong: ![image.png](//image.easyeda.com/pullimage/eizNJDjmXa9dVvVO4cbUTZ1iRGYgIWRlpveuyRka.png) If you find a mistake in **any** part please submit an error report about it clearly stating what is wrong and what action needs to be taken to correct the error using the **Report Error** menu option: ![image.png](//image.easyeda.com/pullimage/PFWDmHg1eRJixpgebXsvyN5NRZ8EY9KLsK9WM1ES.png) ![image.png](//image.easyeda.com/pullimage/5m55M2Oox5ZZZ4U8jUmZyZvOFIsfR8fJIIbBUVgX.png) Please note that I have submitted this report.
Reply
andyfierman 4 days ago
@Biophob, Hmmm, I'm not suprised that you're confused. It looks to me like the Footprint Manager is broken. Please see: [https://easyeda.com/forum/topic/Pin-numbers-but-not-pin-names-can-be-corrected-in-the-Footprint-Manager-7b2d4c883e0249639722c68db2263556](https://easyeda.com/forum/topic/Pin-numbers-but-not-pin-names-can-be-corrected-in-the-Footprint-Manager-7b2d4c883e0249639722c68db2263556)
Reply
UserSupport 3 days ago
Hi All It fixed now. we re-assign a footprint for it. and at LCSC classe has a PMLL4148L,115, it is correct, suggest using LCSC part first. Thank you for report. ![图片.png](//image.easyeda.com/pullimage/ydPbRrJBpIFucsPrRQn3tjL055adlaH1U5DSMh1G.png)
Reply
Login or Register to add a comment
goToTop
你现在访问的是EasyEDA海外版,使用建立访问速度更快的国内版 https://lceda.cn(需要重新注册)
如果需要转移工程请在个人中心 - 工程 - 工程高级设置 - 下载工程,下载后在https://lceda.cn/editor 打开保存即可。
有问题联系QQ 3001956291 不再提醒
svg-battery svg-battery-wifi svg-books svg-more svg-paste svg-pencil svg-plant svg-ruler svg-share svg-user svg-logo-cn svg-double-arrow
We use cookies to offer you a better experience. Detailed information on the use of cookies on this website is provided in our Privacy Policy. By using this site, you consent to the use of our cookies.