Soldering point
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justinnik 1 month ago
Hello everyone, I want to create my first PCB  and  I'm almost done. But I don't know how I can create an area to solder a cable at the Board. I would appreciate the help.
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deskpro256 1 month ago
In the PCB tools box select "Pad" and place it where you want. You can move it later also. ![1.png](//image.easyeda.com/pullimage/OUO6hmSp0hb2HJrzjGBqqinrRmd0N7lHxxpVFnh2.png) In a PCB of mine I had already placed 2, the oval pads under label "RPROG". Select the pad to change its properties. ![2.png](//image.easyeda.com/pullimage/GJpL49BErrg7perCjAGOAt1pDOlmMtgCP6QXjhfs.png) Choose the layer it's on: top, bottom or multi-layer; Choose the shape as you like: round, oval or square; Make sure you put the NET label the same as the trace you want to connect to, let's say GND or VCC or BAT whatever you have chosen. Change the width and height of your pad as you please. Hope that helps!
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justinnik 1 month ago
Thanks for the answer. I don't know that I choose the layer and its look like a hole, because of the standard ist multi layer.
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andyfierman 1 month ago
Beware that your pads in the PCB may he deleted when you do Update PCB if they are not represented in the schematic by suitable symbols. Please see (2.2) 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) to avoid this.
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andyfierman 1 month ago
Please also the checklists, (4) and (6) 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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justinnik 1 month ago
I have now finished the PCB. I want to run 10 LEDs (105ma 3,3V) with 105ma and 6,6V for this I have a 1050ma constant current source. So I connected 10 LEDs in parallel and 2 in series. Does the circuit on the PCB work?
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justinnik 1 month ago
![dasdaswdasd.png](//image.easyeda.com/pullimage/UlzWQstIjrofEGfwUg85czAGGJuPjXD0al95PRT8.png)!
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andyfierman 1 month ago
Probably not very well. Your tracks are way too thin for 105mA let alone the 1050mA that you will have at the pads. Search the web for: **trace width vs current calculator** Putting LEDs in series is good because they all have the same current flowing through them. Putting LEDs in parallel with no series current sharing resistances is a bad plan. Therefore the LEDs in any given pair will have the pretty much the same brightness but there may be very different brightnesses between the pairs. [https://easyeda\.com/andyfierman/LEDs\_must\_have\_series\_resistors\-OoGYgCK2k](https://easyeda.com/andyfierman/LEDs_must_have_series_resistors-OoGYgCK2k) You would do a lot better connecting all the LEDs in series and using a dedicated LED driver chip like: [https://www.diodes.com/products/power-management/led-drivers/medium-voltage-dc-dc-led-drivers/#Topologies%20(Buck):["No"]](https://www.diodes.com/products/power-management/led-drivers/medium-voltage-dc-dc-led-drivers/#Topologies%20%28Buck%29:%5B%22No%22%5D) or maybe: [https://www.diodes.com/products/power-management/led-drivers/low-voltage-dc-dc-led-drivers/#Topology:["Boost"]](https://www.diodes.com/products/power-management/led-drivers/low-voltage-dc-dc-led-drivers/#Topology:%5B%22Boost%22%5D)
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