Questions tagged [pcb-fabrication]

About the manufacturing of PCBs (Printed Circuit Boards).

Filter by
Sorted by
Tagged with
0
votes
2answers
52 views

MT03-004 EDA Library

Currently working on my Honours project, we're designing a wide area sun sensor for an attitude control system of a picosatellite platform. We've elected to implement a COtS quad-photodiode package, ...
0
votes
0answers
80 views

1oz copper ok for card edge connector in prototype?

I'm doing a small prototype system and would like to fab boards at one of the inexpensive Chinese places like: https://www.elecrow.com/pcb-manufacturing.html I'm going to bus the boards using ribbon-...
25
votes
6answers
9k views

Have I placed too much on this PCB layout?

I am doing my first PCB layout (using Altium) and have finally gotten past the auto-router stage. The result is a mess and there are some missing nets and design rule violations. Have I packed too ...
0
votes
4answers
163 views

How should I connect my PCBs? [closed]

I will need to connect several PCBs within a single enclosure for the project I am working on (They are split to reduce cost should there be a manufacturing error). I need to connect an I2C Bus, 5V , ...
0
votes
2answers
2k views

PCB traces: oz to mil (thickness) conversion (for stripline)

According to http://referencedesigner.com/cal/cal_02.php, the conversion between "oz" and "mil" (thickness) for a PCB trace is 1.37. Also, according to zcalc.exe (...
1
vote
1answer
516 views

Unable to identify minimum trace spacing from Gerber file

I designed different PCBs using KiCAD, exported gerber and drill files and uploaded those to JLCPCB. However, I get the following warning: Can not identify the minimum trace spacing As far as I ...
2
votes
2answers
6k views

PCB base copper weight vs plating thickness

I am using Saturn PCB Design to help get the trace geometries to implement PCB differential characteristic impedances. I have some dimensions from the board house: But I am confused on how to input ...
0
votes
0answers
94 views

Oculus development Kit 2 headset design, main PCB cutout

I've been reviewing the Oculus development Kit 2 headset design. Files here There is a cutout in the PCB that confuses me. It's 1mm wide and there isn't any notch or anything on the assembly to fit ...
3
votes
3answers
266 views

How can I align the PCB and the polygon?

As you can probably tell, I'm new to PCB design and recently did a design of a DIY circuit. Everything looks acceptable (to me), however for some reason I cannot align the PCB edges to the polygon ...
2
votes
1answer
117 views

Custom PCB for temperature measurement [closed]

I have very little knowledge of PCBs and electronics, so bear with me. I have a requirement where I have to read the temperature of an object. The thermocouple part has been figured out and ...
17
votes
7answers
4k views

My PCB manufacturer only requires eagle board file, and not a gerber file is it fine to go about getting the board fabricated with him? [closed]

It's my first time getting a PCB manufactured. My manufacturer only requires eagle board file, but not a Gerber file. Is it fine to go about getting the board fabricated with them? Or should I be ...
2
votes
2answers
166 views

Setting number format for PCB fabrication in Altium

I 'm very new in PCB designer CAD. I have a simple PCB design in Altium which I need to create gerber and drill files before sending it to a milling machine. When I go to: Files-->Fabrication ...
0
votes
1answer
207 views

“etching” transparent conductor on transparent plastic film or glass? [closed]

I've put the word etching in quotations as the method to get conductive tracks on a glass or plastic film might not involve a subtractive approach as with traditional PCBs of applying a conductive ...
0
votes
2answers
84 views

Pcb with led screen display always on [closed]

I have this PCB with led display constantly on consuming all the energy available in the battery I connect. There is a way to switch it off after few seconds? Dc-dc Boost Step up Voltage Converter ...
0
votes
0answers
148 views

Problems with PCB Trace / Signal — But Continuity Present

I've been working with a reasonably sized Chinese PCB fabricator, and we've had random problems with boards for the last few months. I'm not an expert PCB layout guy, but we aren't talking about ...
0
votes
2answers
100 views

Varry line thickness of pcb as resistor

I was wondering about if it’s possible to use different thickness’ of copper on a pcb as a measure to refrain from using resistors.
1
vote
2answers
975 views

Hydrogen Peroxide and Hydrochloric Acid Etching

I am trying to make a PCB stencil by etching thin Aluminum using a toner transfer method. I am using H2O2 3% and HCL 10% in a 1:1 ratio. I have also tried 3:1 and 1:2 ratios. The alu has been ...
0
votes
2answers
526 views

Designing circuit in Eagle with two boards and ribbon cable

In order to fit my circuit in my enclosure neatly I need to create it as two PCBs connected by ribbon cable. It's logically one circuit. It certainly makes sense two design it using a single schematic....
0
votes
2answers
157 views

Automatic SMT Line PCB Soldering [closed]

I am planning to create few circuit boards. I am considering getting the PCB printed from a manufacturer and do the SMT via a machine my self. Do you think it is good idea. The reason i an planning ...
0
votes
3answers
311 views

Silk screen layer over pad resist cutouts on pcb

I am designing a SMD PCB and have noticed that some component silk screen outlines extend over the pad resist cutouts. Is this acceptable? If the resist cutouts are made after the silkscreen process I ...
11
votes
2answers
2k views

Magnetic power connectors (ie. “dots”) for slim power supply connection

This may be more of a mechanical question, but does anyone know what these magnetic power connectors are called? You see these on Fitbits and other IoT devices. I'm building an IoT board, that has ...
10
votes
2answers
678 views

Actual Assembly Yields — 0402 vs. 0201 / 01005

I've been designing boards mainly using 0402s. I can hand solder 0402s all day with a microscope and some tweezers. Our passive supplier (a random Chinese passive company) has told us to get ready ...
2
votes
1answer
393 views

What's the proper track to learning PCB Design? [closed]

I am a Computer Science guy. But recently I became interested in designing PCBs. I have done a few designs on Eagle. But they are quite basic. I tried to move forward, but PCB design just seems to be ...
1
vote
1answer
344 views

Stencil Required for Through Hole Components

I was creating a pcb board that is mostly made of header pins that are suppose to connect to adapters. I was wondering if a stencil is required for soldering through hole components on a bare bone pcb....
1
vote
2answers
385 views

Max acceptable resistance between IC ground and PCB ground plane

I tend to be very paranoid when it comes to making PCB's to the point where I try to use 50+ mil tracks for ground wires when routing the board. After, I fill the remaining space on the board with a ...
0
votes
2answers
94 views

Mounting a solderless tie point

I have an application where popping some solderless tie points on a PCB is a thing to to. I picked up some 1x4 tie points, https://www.elexp.com/ProductDetails.aspx?item_no=03TB-IVR&CatId= The ...
14
votes
1answer
4k views

Why order a laser stencil?

Quick two part question on PCB manufacturing. I am looking to order a prototype PCB and all the manufactures I've gotten a quote from all offer to include a Laser stencil, some charge for the stencil ...
0
votes
2answers
530 views

How to decide PCB specification [closed]

Everything is in the title. Let's say I design a PCB layout. It has 4 layers. How do I decide: The material to use for the PCB (difference between FR TG 130, FR TG170, Aluminium, or other materials) ...
3
votes
1answer
412 views

How can I add Board Shape to output job in Altium Designer?

When I want to add board shape to final output in output job, I draw board shape on a useless layer and then I add that layer to output job. Is it possible to add board shape automatically in Altium ...
8
votes
5answers
2k views

What is the silver strip behind crystal in the PCB?

Consider: I came across a PCB, and I found a silver strip behind the crystal. What is that strip? Has anyone used it?
0
votes
0answers
55 views

Printing resist onto paper pcb

Is there a paper that can go into a printer to be used as a pcb? Basically what I'm looking for is a silicon sheet with a thin layer of copper on top that ink can be printed on to be used a resist. ...
9
votes
2answers
1k views

Red resin in-between closely spaced PCB pads

Closely positioned components on this one sided PCB have red resin separating solder connections and underneath surface mount components. What is it? How is it applied and why do only some ...
1
vote
2answers
509 views

Altium Designer 17.1: importing or copying parameters for 1 project to another at once

Can you please tell me if there is a way to import/copy all parameters (Design>Document options-Parameters) (at once) from other project in which I have already added. Or is there a way to make my ...
2
votes
4answers
299 views

Choosing a PCB Manufacturer/Assembler for the first time [closed]

I've just finished designing my first PCB, and I'm about to send out a batch of emails for quotes from manufacturing/assembly shops. My design is super simple: the only components are 7 identical SMD ...
6
votes
1answer
725 views

What influences prepreg thickness?

I only have experience with low-speed boards that are 4 layers at most. I want to get into full-speed USB 2.0 and 100Mb/s ethernet, so I need some impedance controlled traces. Instead of doing ...
1
vote
1answer
98 views

Can I order PCB/chip manufacture from provided LOTOS specification?

Is there a way to automatically deduct PCB and/or chip design from formal problem specification of a problem (task) which supposed to be solved on a PCB/chip? I'm currently implementing solution with ...
3
votes
2answers
363 views

Inconsistent solder mask on vias

When looking at PCBs in consumer products or PCBs I have ordered from manufacturers myself, I notice that, while many of the vias are covered in soldermask, it seems like a few random vias are missing ...
0
votes
1answer
1k views

How to generate Assembly drawing in eagle

Hi all for the production purpose the ems partner asked me assembly drawing of my pcb is there any easy way to create an assembly drawing with part name inside the boxes as in the picture in eagle?
9
votes
2answers
2k views

Is there a way to make a drill hole only up to half depth of the PCB in Eagle?

I need to solder a through hole ZigBee as though it were an SMD part. The other side of the board is a touch pad so there should not be any solder or components on it. I think it is better if I can ...
0
votes
1answer
66 views

How connections in a multilayered PCB used to be done?

how each layer works do each of them has an individual task or functioning or all are interconnected to each other beacuse i am confused as when they get fabricated how assembly of components on each ...
1
vote
2answers
712 views

Custom/DIY Metal-Core PCB?

I would like to fabricate a slight enhancement over the metal-core PCB's shown here: https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=6071 Specifically, my application requires 2 LED's of ...
0
votes
3answers
258 views

PCB design mistake

I ordered PCB for my prototyping board and I made an inversion about the pin of the microUSB : (If the bullets stand for the pin) Original microUSB : GND ID D+ D- 5V My board : 5V D- D+ ID GND ...
0
votes
1answer
180 views

Stencil for PCB etching?

I have been looking into homemade PCB etching, since ordering PCBs takes longer than I would like. I have seen PCB stencils for applying solder paste, and I am wondering if it is possible to use a ...
-7
votes
2answers
770 views

Difference between single layer and multilayer PCB? [closed]

Please answer my question Difference between single layer and multi layer PCB ?
2
votes
1answer
141 views

Does fast one-day prototype manufacturing exist (with components, etching and pick and place under one roof)? What is the fastest possible? [closed]

We have different prototyping assembly houses, but cycle times are so long that engineers need to work on 2-5 projects in parallel. The typical prototype assembly process is: one day order process, ...
-2
votes
3answers
649 views

Why solder paste is not popular and seems almost illegal? [closed]

Once I found out you can use solder paste to assembly at home I was shocked. Think about it, any hardware startup build a pcb, its cheap, then you get it and you want 5-10 copies, and you also have ...
0
votes
1answer
1k views

Half-etched fiducials Vs through-cut fiducials

While making PCB, I added 8 fiducials (fids) marks so that pick and place machines use these marks as referent points on the PCB to position the surface mount components (Packages) during assembly. ...
1
vote
1answer
410 views

PCB trace routing trick: how safe is it? [duplicate]

In a 2 layer PCB I routed some tracks under unused pins of a MCU to avoid GND polygon crossing, and also saved few vias. For example, using this trick 2 SDIO traces on the left were routed nicely ...
-1
votes
2answers
104 views

can 2 3mm leds fit within a 5mm bi-color led without bending wires?

After creating a circuit calling for a bi-color common-anode LED, I checked places for stock, and to my dismay, all they wanted to sell common-cathode bi-color LED, but the funny thing is I can order ...
2
votes
2answers
1k views

What is the general rule of thumb regarding UL's creepage clearance regulation?

I've read a whole bunch of material but I'm still quite confused regarding creepage clearance, specifically: How to calculate the minimal clearance on a PCB board? How to calculate the width of the ...

1 2 3 4 5 10