led array design
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bodydropped72 4 days ago
im trying to design an led array and need help on how i can add the specific number of leds to my layout instead of adding each one at a time. specifically this will be 2 rows of 3mm through holes with 351 in each row thanks in advance
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andyfierman 4 days ago
Start with a Schematic than copy and paste the LEDs in that. If you lay them out in the schematic roughly as they will be in the PCB then after you have done Convert to PCB, this post will help you to get them in roughly the right layout on the PCB. Then use **Find Similar Objects...** ![image.png](//image.easyeda.com/pullimage/bM1U1Gepn64UTTEJwDW6kHHlly9auUuPISp1UN22.png) to find and select all the LEDS and then use the **Format > Distribute Array...** tool: ![image.png](//image.easyeda.com/pullimage/aHtoQcTKtdTSD8GvvoTfy2LkRFvP0oZX5IcrsY1R.png)
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bodydropped72 4 days ago
So on the schematic it doesn’t have to be to the board dimension, that is done in the next step correct?
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andyfierman 4 days ago
@bodydropped72, Sorry! I forgot to include the link to "...this post..." [https://easyeda.com/forum/topic/Component-autoplacement-into-PCB-3f0f310db0d74a9bbf848953c4c8048d](https://easyeda.com/forum/topic/Component-autoplacement-into-PCB-3f0f310db0d74a9bbf848953c4c8048d) But you are correct. The schematic has no concept of dimension but CTRL+ SHIFT+X preserves the relative positions from the Schematic into to the PCB. Actually, you don't have to do the CTRL+ SHIFT+X step because the Find Similar Objects... will still find all the LEDs and then they'll be arranged by the Distribute Array... tool.
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bodydropped72 3 days ago
what is the symbol for a simple wire to board connection? i plan on connecting the 5 input circuits and ground wires directly to the board
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andyfierman 3 days ago
@bodydropped72, You can select a suitable connector from the LCSC library or just use any symbol for a connector or header with the required number of pins and then find a suitable PCB Footprint the name of which you then assign to the schematic symbol Footprint attribute. This is all covered in the Tutorial  (1), with more in (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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