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Questions tagged [eagle]

EAGLE is a low-cost PCB design software package.

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20
votes
6answers
28k views

How do I facilitate keeping multiple grounds, (i.e. AGND, DGND, etc…) separated in the layout when using Eagle?

I've designed several PCBs where I needed to keep the ground returns of different parts of the circuit separated, i.e. analog, digital and high power. I use Cadsoft Eagle for schematic capture and ...
4
votes
2answers
1k views

How to draw a polygon with clear spaces inside in EAGLE

As title EAGLE don't allow me to draw a clear space inside a polygon. I've a GND polygon plane and I don't want that a zone inside it is filled with this plane. How I can do that?
27
votes
2answers
11k views

Connectorless USB on a PCB

I would like to make a board which can be plugged directly into the USB port of a computer, instead of using a separate male "USB-A" connector. I have seen this system used for very small USB memory ...
20
votes
3answers
22k views

Design a veroboard/stripboard layout from an Eagle schematic

So I have just finished learning the basics of Eagle (Lite) and I really like it. As I don't have the full kit to start home PCB etching yet (something I am looking into now) I would like a tool that ...
7
votes
3answers
12k views

Missing components in Eagle Library

I am missing libraries of certain ICs for use in Eagle. Can someone guide me to a source where I can find these IC libraries? I am asking this question to find out if there is any central repository ...
11
votes
2answers
4k views

Acute angle routes in PCB

Following is from a PCB that I am presently working on. That particular path signals are of 100-400kHz signals. Is there any problem in having routes of this kind?
9
votes
2answers
10k views

Eliminating Thermal Isolation Pads in Eagle

When creating a ground plane in Eagle, Eagle automatically creates a thermal isolation for the pad. My first question is, does this isolation limit the current compared to a pad that is "completely"...
8
votes
5answers
11k views

How can I make a decent ground plane in Eagle?

I've made a couple of simple PCBs as a hobbyist, and for the first time now I want to add a ground plane pour but I'm having some issues. As I have currently understood I need to: Create a polygon ...
28
votes
4answers
39k views

Eagle - How to attach a pin not shown on schematic symbol?

In Eagle, I would like to include SN74HC595 shift registers in my project. I found a library online a few months ago (can't find source anymore) that has this part. The symbol looks like this: ...
8
votes
2answers
9k views

How to create “wireless” networks in Eagle Cad

In this schematic they've somehow created "wireless" networks, meaning networks that connect two components but don't have an actual wire in the schematics. What are these called, and how can I ...
6
votes
3answers
6k views

Vias on QFN centre pad in Eagle PCB

I'm using some QFN devices in a PCB I'm designing using the Eagle PCB software. The QFN packages have a centre pad that is grounded and intended to help with thermal dissipation. When creating the ...
13
votes
1answer
5k views

Why do I get warnings for all my voltage supply connections in Eagle CAD?

Take a look at the following list of ERC errors: Why is Eagle CAD showing Warnings for the voltage supply connections? For example: POWER pin U1 VIN connected to VBUS I know these pins are ...
10
votes
3answers
10k views

Blind/buried vs. through hole vias?

I'm trying to learn PCB design and, from what I've read and seen, there appear to be three different types of vias: Through hole - goes all the way through the board Blind - goes from the top or ...
9
votes
2answers
22k views

Arrows on connections in schematics

Im using eagle, and was wondering how i'd produce arrows like this: Is there a specific name for these? That show connections between many schematics.
5
votes
1answer
1k views

How to connect same signal pads in Package Editor in Eagle?

So, I'm trying to make a circular pad for a project: To try to make my life easier when changing inner and outer diameters I created a package which consists of 2 pads: one horizontal, which connects ...
3
votes
2answers
7k views

Eagle printed PCB scale problem

I have made a layout using eagle then save it as PDF to print a test paper before routing. I didn't design any package its all eagle's packages. I exported PDF as shown on the image but the problem ...
1
vote
1answer
685 views

Power Resistor in Eagle

I'm making a PCB in Eagle. First I found my components, and now I have to put them in Eagle so I can draw the actual board. Now the problem is, I have found this power resistor (I need 0.5 Ohm ...
1
vote
2answers
3k views

How to add vias and more traces?

I am getting a Drill Size error and overlapping errors because I added a new via and a wire to my PCB. I'm not really sure why I am getting these errors. Is there a way to add a new wire and get it to ...
1
vote
1answer
360 views

Seperate Signal Planes in Eagle

I am trying to make separate signal planes in eagle using the polygon tool. The problem is that when I draw the first polygon, regardless of whether I draw it small or large once I name it to GND and ...
0
votes
2answers
1k views

Eagle: supply pin vcc overwritten with more than one signal

in some words, my circuit is feeded from battery (VBATT). The VBATT is taken with a voltage divider for read voltage by Atmega, and is routed into a voltage regulator (from 0.8/3.2 to 3.3) VREG. All ...
24
votes
8answers
12k views

Advice on going from rat's nest to routed PCB

Can anyone offer any useful strategies on going from a rat's nest to a routed PCB? (I'm using Eagle and aiming to make single/double sided PCBs at home) Drawing the schematic is fine, but when it ...
25
votes
5answers
7k views

How to create measurement points on a PCB for diagnostics?

What is the best way to implement a point on a PCB, where a voltage (e. g. output of a regulator) could be measured with multimeter for the purpose of verification of the assembly or diagnostics in ...
21
votes
3answers
25k views

Mounting hole on a PCB

Here is a picture of 3 mounting holes on three different PCBs. The red one is what I prepared on Eagle CAD and used "hole" button on the left side menu , something like this: Do I need to use "...
14
votes
1answer
26k views

Solder Mask and Cream in Eagle

I've got this part specification for the Paste Mask excerpted from the datasheet: There's a lot of lingo in this short paragraph that I would like to better understand conceptually. Specifically I ...
5
votes
2answers
16k views

Enabling extra routing layers in Eagle (paid version) PCB design

I started a PCB design in the freeware version of Eagle, now I have the full version, but it won't let me route tracks to the extra route layers (i.e: only top and bottom). Starting a new design in ...
10
votes
2answers
3k views

Is it normal to have a rats-nest of VCC/GND traces under an IC?

I'm attempting to route a simple board, the first I've done in 15 years since I routed a 12V linear power supply in the equivalent of mspaint. This board consists mainly of an LPC2387, which is an ...
7
votes
2answers
831 views

PCB Panelization tool/SW and adding test connections

I prepared 4 different PCB layouts on Eagle CAD and generated Gerber files. As I can see Eagle CAD doesn't have any option to panelization. Is there any free tool/program that can allow me to ...
5
votes
1answer
9k views

How do I define a tented via-in-pad in Eagle?

How do I define a tented via-in-pad in a parts library in Eagle PCB? (Example of result here:) Once I define the large pad underneath the QFN, I seem to be able to turn the soldermask on and off. ...
5
votes
2answers
3k views

Designing castellations/half holes using EAGLE

I wish to use some castellated pads or 'half holes' for board to board connections but I'm having a hard time finding a reference detailing how to specify these in my CAD package of choice (EAGLE). My ...
4
votes
3answers
6k views

How to create complex copper shapes in Eagle

I'm new to eagle but for a project I need to create a pcb with a complex arrangement of exposed copper contacts. The board is going to be used as a simple touch sensor made up of concentric and ...
3
votes
1answer
820 views

Eagle CAD pins with same function

I would like to design a tactile switch footprint, where there are clearly two pads and two pins on each side of the switch, but let eagle cad's router know that it can route to either pair of pins. I ...
10
votes
2answers
16k views

EAGLE Matched Length Pairs / Groups

What facilities does EAGLE CAD have for helping to do layout with matched length groups and differential pairs? Can you apply such a constraint in the auto-router? As a follow-on to this, what (other) ...
8
votes
2answers
8k views

Hide particular airwires/nets in eagle

Is it possible to hide particular airwires in eagle, without hiding all of them? So if there's a net I am not currently interested in, but it has a lot of connections, confusing where other airwires ...
7
votes
3answers
894 views

Angles and measurement - PCB design help

I have started doing PCB design from last month and very new to this. I have done tiny bits on eagle cad and Altium cad but still learning things everyday. Now I got a challenging board to do. Though ...
7
votes
3answers
2k views

What happens to copper pours that are 'too narrow'?

What happens to copper pours that are narrower than PCB manufacturer spec? Let's say spec is 10/10 mils (trace/space) and the copper pour in between soic-08 is only 5mils because it can't be wider (...
7
votes
3answers
2k views

CAD Schematic pin arrangement approach

I was looking for related questions here, and the closest one I could find was this one: Industry Practices for Schematic Design? However, it does not address my specific question, so here goes: I am ...
5
votes
2answers
5k views

Eagle - non solder mask defined (NSMD) pads

I am designing a PCB layout in Eagle and in the datasheet of my modul it is said that "Non solder mask defined (NSMD) type is recommended for the solder pads on the PCB". Does it mean that there will ...
5
votes
4answers
595 views

How to deal with devices connected via a connectors in schematics?

I have a few sensors (potoresistor, temp sensor...) that connect to the board indirectly. The PCB will have a connector such as the molex 4pin fan connector that will in turn connect to the sensor/...
4
votes
1answer
3k views

Eagle via diameter discrepancy

I made a part in eagle with vias using a set diameter (smaller then auto), but when I use the part on a board, the vias go back to having a diameter of auto. any ideas? The left window shows the ...
3
votes
1answer
7k views

Thermal vias in Eagle (CAD)

I'm making a part in Eagle (4.15) for a SOIC-8 package. There is a thermal pad in the center and I'm trying to add vias stitching the top and bottom pads together. In the Eagle package editor there ...
1
vote
3answers
3k views

PCB tracing - Ground plane and Power plane?

Is it generally a bad idea, in simple or moderately heavy circuits, having two layers, to have a power plane in the top and a ground plane on the bottom? The tracing would become much easier, there ...
-3
votes
3answers
4k views

Need help making an STM32 development board

I have been playing around Arduino and wanted to make my own development board for a long time. I have decided to use the STM32F103C8T6 microcontroller for this. But being relatively inexperienced in ...
9
votes
2answers
1k views

How to deal with LFBGA217 package when building prototype boards by hand

I am involved in a project in which I need to create a few prototype boards that will use the AT91SAM9G20B-CU processor in the LFBGA217_J package. Because this is ...
6
votes
7answers
2k views

How do I find a short in an unpopulated 4-layer PCB?

I have a 4-layer PCB, designed in Eagle CAD 6.5. The stack-up is: Signal GND (ground) DVDD (digital power) Signal GND and DVDD are solid planes, with vias connecting them to layers 1 and 4. I have ...
4
votes
3answers
4k views

How do I pan in EagleCAD with an Apple MagicMouse

I'm using a MacBook Pro with OS X Mountain Lion, but can't figure out how to pan the schematics?
4
votes
2answers
742 views

Precisely drawing component footprints in EAGLE

Whats the recommended way for placing components accurately and quickly when creating EAGLE parts? For example in the drawing below, using grids with 0.01 grids will give us the control needed for ...
3
votes
1answer
104 views

Missing pad tCream

I've just finished my first component footprint and then I figured out that there is a pad without tCream, which I guess it is generated automatically. What could be went wrong? By the way, does it ...
2
votes
1answer
5k views

Non Plated Through Holes in Eagle

I am thinking about a project that has need for various different complicated wiring connections. I would like to make a single board that would make it as easy as possible to make arbitrary ...
2
votes
1answer
2k views

How do I add the board of a pre-existing controller to my project?

I have a DigiSpark board that has the schematics and board files released in their website. I am making a PCB where I need to have that part in my circuit. Right now I have tried editing the ...
2
votes
2answers
5k views

Combining multiple EAGLE PCBs to one

I made 6 different sensors , unfortunately they are separate designs, and it cots more for production as well. I tested the prototypes and everything is working perfectly. So i dont want to change ...