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Is this right/copper area?
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Josh Katz 6 years ago
Hey, Just a simple board, 2 LED's and jumper for power in, ground and 3 hole linked to ground. All the routing is done on the front. Is there anything else I need to do before sending it? Do I need the copper area tool, bit confused by it. And is there a way to have multiple of these next to each other in a grid? [https://easyeda.com/jkatz098/737-annun](https://easyeda.com/jkatz098/737-annun)
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UserSupport 6 years ago
Your PCB haven't copper area you need to use this tool ![image.png](//image.easyeda.com/pullimage/bSKlLeSx75XWqBTh3DxMat5Cddip046hLqLvAHYT.png) [https://docs.easyeda.com/en/PCB/Copper-Pour/index.html](https://docs.easyeda.com/en/PCB/Copper-Pour/index.html)
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Josh Katz 6 years ago
Is that correct now? I only need to do Top? Or do I need to do the Bottom?
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Josh Katz 6 years ago
@UserSupport I added tracks to the bottom and made copper area for top and bottom, so I can solder on either side. Is that correct?
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andyfierman 6 years ago
@Josh Katz, It's not possible to tell exactly what LED current you are drawing because you have no Supplier, Supplier, Manufacturer or other BoM information in the project however, it looks like you're using low current (20mA? 40mA total?) LEDs so you probably don't need to use a copper area because the voltage drop/temperature rise in your tracks will be negligible. Do you need to connect the fixings to ground? If so, then put a copper area on one or both sides and give it the same net name as the track to the LEDS that you are expecting to be the ground track. Better still net name that track GND and then name the net attribute for the copper area to be GND too. Then, to ensure the fixing is properly grounded to the copper area, replace the central hole with a Muti-layer Pad with a hole very slightly larger than your original hole diameter (to allow for the copper through-plating) and give that pad net name of GND too. Note that you need to check that the other track (or both tracks if you don't add the GND copper area) is well clear of the fixing nuts/washers etc. that you may be using that central hole for. Note that it is not good practice to try to drive LEDs in parallel without current sharing resistors in series with each one. For an explanation of why this is so, please see: [https://easyeda\.com/andyfierman/LEDs\_must\_have\_series\_resistors\-OoGYgCK2k](https://easyeda.com/andyfierman/LEDs_must_have_series_resistors-OoGYgCK2k)
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Josh Katz 6 years ago
@andyfierman Thanks so much for the reply Andy! Basically the pcb is just so it makes it easier for mounting the LEDs I have a system board from a manufacturer that gives me 8 pins able to drive dual LEDs (Resistors included) and 1 ground pin So from say pin 1 I will go into the +5v hole and through the 20mA or so dual LEDs then out the ground to the ground on the system board. The joint ground hole will then go to the next ground hole on the next identical pcb So with that all said, do I need a copper area, or can I just run it as power planes?
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andyfierman 6 years ago
Can you draw a schematic of what you're trying to achieve? Then there's no room for misunderstanding. :)
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Josh Katz 6 years ago
Sorry I thought it was in there [https://easyeda.com/jkatz098/737-annun](https://easyeda.com/jkatz098/737-annun) But basically it doesn't need any resistors or a copper area. It's simply to hold the LED's and make connecting easier. It takes it's power from a system board that regulates resistance. It's more about is it cheaper to just run power planes or copper pour? Using this software can I just draw the track lines and thats it?
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andyfierman 6 years ago
It makes no difference to the price. If you connect both LEDs in parallel and fed by a single current limiting resistance, you may find that there's a noticeable difference in brightness between them. In your earlier reply, you implied that there's more than one pair of LEDs that you want to drive. I understand how the PCB is wired up. Your schematic just shows that. I meant can you draw a circuit diagram showing how the LEDs connect to whatever is driving them.
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Josh Katz 6 years ago
Oh right, its a bit more complicated, its a duty cycle not resistors anyway. But it basically has pins that go to each pcb I'm making and then all the ground on my pcbs link I'm basing it off a design I've seen so I know it works. Was just confused if I could just run it as power planes. Because of the other comment saying I had to have a copper area. So realistically should I go back to my original design or is the current fine and leave it as is?
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andyfierman 6 years ago
Is this a hobbyist project or is it part of something you're going to sell it in quantity?  ask because if you're using PWM to drive the LEDs then you have a potential EMC emissions problem. In which case you would be better to put a ground plane on one side of the PCB and the led anode connection tracks on the other. And just because the LEDs are driven by PWM does not alter the comments about the current sharing resistors. Also, just because someone else has done what you're copying does not necessarily make it good practice. :)
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Josh Katz 6 years ago
Its for a home cockpit ![fds-b737ng-main-hw-2-0-5_1024x1024@2x (1)f.jpg](//image.easyeda.com/pullimage/0XkB047kddDrSLAKNFCb1payQaaNyRLP6oAs1g3E.jpeg)
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Josh Katz 6 years ago
Thats the more technical version but its just a simple design. But I'm ok to just use power planes right? no need to use the copper area tool? If I just draw tracks thats enough right?
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andyfierman 6 years ago
Your replies don't actually explain if it's a commercial or a one off project so it's not clear how much effort you need to put into meeting the relevant EMC Regulatory approvals. You can do it either using the Copper Area tool to create top and bottom layer planes or use simple copper ttacks. For something this simple just do it with tracks.
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Josh Katz 6 years ago
It's one off. Thanks Andy!
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Josh Katz 6 years ago
Are all pads plated? Can I solder either side of the board without having tracks on both sides?
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andyfierman 6 years ago
Pads for through hole parts have pads on both sides of the bottom and are plated through the hole so yes, you can insert and solder from either side. Through hole pads are multi-layer so they also connect to any inner layers.
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Josh Katz 6 years ago
Is there a specific tool I need to insert through hole pads? Or is it just any pad that goes all the way through is automatically a plated through hole?
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Josh Katz 6 years ago
Also is there a standard hole and pad size for hand placed/hand soldered parts?
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andyfierman 6 years ago
"Is there a specific tool I need to insert through hole pads? " PCB tools > Pad and select Multi-layer in the right hand panel. "is there a standard hole and pad size for hand placed/hand soldered parts?" No. EasyEDA has many schematic symbols which already have the appropriate PCB footprint  - and therefore pad types and dimensions - assigned to them. Please follow the Design Flow Chart: [https://docs.easyeda.com/en/Introduction/Design-Flow-by-Using-EasyEDA/index.html](https://docs.easyeda.com/en/Introduction/Design-Flow-by-Using-EasyEDA/index.html) And also see: [https://easyeda\.com/andyfierman/Welcome\_to\_EasyEDA\-31e1288f882e49e582699b8eb7fe9b1f](https://easyeda.com/andyfierman/Welcome_to_EasyEDA-31e1288f882e49e582699b8eb7fe9b1f) And: [https://docs.google.com/document/d/1ZRkPPMID68mBz9j9RMIJARNSXK12PDULZXP7kiThvDg/edit?usp=sharing](https://docs.google.com/document/d/1ZRkPPMID68mBz9j9RMIJARNSXK12PDULZXP7kiThvDg/edit?usp=sharing)
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