PCB is the acronym to Printed Circuit Board. A PCB is a carrier for the circuit's components and their electrical connections.

learn more… | top users | synonyms (2)

0
votes
0answers
45 views

PCB Power grid trace

I am currently working on my PCB layout and having trouble laying the power traces. I am trying to avoid running any tracks under signal traces and keeping power somewhat separate. I tried doing ...
0
votes
0answers
15 views

Kicad plotting/printing

I made a really simple scheme/pcb using Kicad (on Ubuntu 14.04). Now I'd like to print this and make my PCB, but I can't figure out how to properly plot the damn thing! When I plot using gerber ...
0
votes
1answer
42 views

what does this symboles means Unm, Uni?

I found in some documents that the creepage and the clearance distance for PCB are calculated according to the value of the tensions Unm and Uni. What does this symboles means ?
1
vote
2answers
292 views

Designing a high-power PCB

I'm trying to build a Raspberry Pi cluster (at least 32 Pi's) and I need a convenient way to power them all. So I'd like to design a power distribution board. The distribution board will have USB ...
1
vote
0answers
30 views

Critique and dos/don'ts for an H-bridge PCB design?

Honestly have no idea if this is something this site was made for, but I have a couple of questions about my design, mainly it comes down to "Will it work?" and "Why would it break?". JC1 and JC2 are ...
0
votes
2answers
27 views

Can I mount LTC6102 on breadboard?

LTC6102 is a shunt resistor current sensor with the following datasheet: http://cds.linear.com/docs/en/datasheet/6102fe.pdf The package Description has come on page 24. If everything is in mm, then ...
1
vote
1answer
52 views

A USB SD card reader on your own PCB

I'm actively looking for a solution about this since nearly 2 months: I need to build a USB SD card reader slot for my project www.samplerbox.org. I tried various solutions: buy some cheap USB SD ...
0
votes
1answer
114 views

What runs a g-shock watch?

I am currently trying to learn more about watches and what it takes to build them. I currently own a watch called the G-Shock 7900b and was wondering what runs it inside. Here is a link to the watch: ...
0
votes
3answers
50 views

Panel mount DC barrel jack on PCB

Is it possible to solder the panel mounted DC connector shown in the image below on to a PCB? I was unable to find an Eagle library for the same. If it is not possible to solder on to a PCB, any ideas ...
1
vote
1answer
48 views

Altium PCB: what do these patterns on traces and vias mean?

I was just checking a PCB design, and found these box-patterns on some of the nets. What do they mean?
0
votes
0answers
16 views

Eagle PCB & cnc milling machine export format

I made a pretty PCB board in eagle cadsoft 7.2. I have a CNC milling machine i'm tring to export the vectorial file as HPG format then import the file to the cnc miling machine software. I only ...
0
votes
0answers
20 views

Why am I gerring this drill size error in Eagle Cad?

Why do I keep getting this drill size error in eagle cad. It seems like no combination of trace width or drill size will make it go away.
0
votes
1answer
35 views

How to determine BGA land pad diameter for given ball diameter?

I'm working on a project which requires the use of a CSP package. The product's datasheet provides ball pitch in each axis as X:710um Y:580um and ball diameter as 250um but nothing about the preferred ...
0
votes
0answers
42 views

Drawing Schematics for different boards

I am an entry level electronics engineer. I have been assigned a task to start off with drawing schematics for the connection of these boards: Picozed Zynq module + SBC + Gimbal + Power Supply using ...
2
votes
1answer
64 views

Multiple Ground Planes

I use a PCB mill to make my boards, and it doesn't etch off excess copper. I'm designing a breakout board for an RF tuner (400MHz), and I planned to have the ground plane on the top and the traces on ...
11
votes
2answers
558 views

Should each trace carrying RF be 50Ohm in characteristic impedance? How?

I have to translate a VHF (160MHz) receiver schematic into a PCB. After looking here and there, I am a bit confused. It seems like the main issues with RF are to avoid stray inductors and ...
1
vote
1answer
33 views

pollution degree and creepage distance

I read in some books that pollution degree can influence the creepage distance in electronic circuits, is there any relation (mathematical) between the pollution degree and the creepage distance.
1
vote
2answers
274 views

What are the “No Connect” terminals on this multiplexer and what purpose do they serve?

I was looking through the datasheet for the ADG506A/ADG507A and on the chip there are these terminal marked as NC and underneath the image it says "NC = NO CONNECT". They are also not explained in the ...
1
vote
1answer
68 views

Should PCBs be rinsed after being cleaned with IPA?

A lot of people recommend using 99% IPA to clean flux (and other stuff) off PCBs. I haven't been rinsing off boards after cleaning with IPA as to my knowledge it's not corrosive, but I'd like to hear ...
10
votes
7answers
811 views

Mains Voltage on Strip Board

I need to prototype something quickly as a proof of concept. Is it safe to use mains (UK 230V) on stripboard? It will be going to a transformer so I can control some appliance. Or should I design a ...
0
votes
1answer
66 views

Trace vs Plane on Multi-Layer Board

Designing a 4-layer board (signal+pwr, gnd, signal+pwr, gnd), and I have some newbie doubts about the best option to connect different connector's pin or IC's pad to power lines, or sometimes to ...
10
votes
2answers
299 views

what is the current limit through a trace?

Similar questions and topics have been asked before such as Standard PCB trace widths? Formula for voltage drop vs PCB trace width, temperature, current, and trace length I've used PCB Toolkit in ...
1
vote
2answers
57 views

How do you measure the actual package temperature of PCB components?

We have an IR thermometer at work, but sometimes I feel like the results aren't completely accurate due to the beam width (especially on small components) or material emissivity. Another way I've ...
3
votes
4answers
428 views

Return path on a PCB

I've spent the weekend absorbing video lectures from Eric Bogatin and reading his book "Signal and Power Integrity - Simplified" He states that the the return path for the PCB may be any DC plane ...
0
votes
0answers
14 views

How Create a Model in Proteus and Ares?

I need to create a model for the INA128 in the Proteus and Ares. There are many tutorials on how to create a model in Proteus, but I did not find one good tutorial for Ares.
0
votes
2answers
44 views

How to create ground and vcc pins

I try to create a GND pin and a VCC pin to connect them to a battery. On my eagle pcb I haven't found them. They should be like 5mm x 5mm. On the schematic I added a ground and vcc pin, but I can't ...
0
votes
1answer
56 views

Loops in ground planes

Working on a PCB layout and just did some ground plane pour. From working with tube amplifier designs I know that a good star shaped ground design helps a lot to keep hum out of the circuit. Ground ...
2
votes
2answers
109 views

Is it possible to recover from this un-soldering mistake?

I did a real mistake when un-soldering this PCB : The metal part of the PCB was accidentally removed. Now it is impossible to solder anything at this place again: the solder material (what's the ...
0
votes
1answer
24 views

Is an edge coupled microstrip / stripline a differential pair or any two adjacent traces?

I got a suggested layer stack, and and it makes mention of "edge coupled offset stripline" and "edge coupled coated microstrip". Are edge coupled traces differential pair traces or are they any ...
0
votes
1answer
77 views

Is this board trace repairable? [closed]

The attached picture shows the main board of my Canon S110 camera. The camera was subjected to a shock with the USB cable connected. This resulted in the connector breaking loose from the board with ...
0
votes
3answers
90 views

Is there such a thing as a pin (or pogo pin) clamp for testing?

I'm an amateur tinkerer of electronic components, and was wondering if a product like I'm about to describe exists for testing components. Say you have an arduino pro mini board. You want to access ...
1
vote
3answers
79 views

Height of the substrate in online PCB impedance calculators

Is the height of the substrate just the non conductive portion between copper layers ? Using this calculator as an example In a 4L board, if the top and bottom traces are of the same thickness and ...
0
votes
1answer
33 views

How do implement my pic24 onto a pcb board?

I have a microstick development board for the pic24, shown here. The microstick contains many other components and parts other than the pic24 that are used for voltage regulating, debuggers, etc. In ...
-1
votes
1answer
60 views

ATtiny85 Breakout Board [closed]

I've made a PCB... I'm not sure if it will work. I've came here for some help. I'd just like to know if there is anything obviously wrong with it. I have attached a image of my PCB so can anyone ...
5
votes
2answers
247 views

Trace Length Tolerance Calculation - High Speed PCB Design

I have to interface a video format converter with a ADC IC, which converters RGB analog data to digital. The connection between this ADC and Converter is a 20 bit data bus which clocks at about ...
2
votes
0answers
51 views

What are the kinds of drill bits can I get for this? [closed]

I have this PCB drill bit I bought during my college years and lucky enough, it still works! But I was hoping that there are other kinds of bits that I can use this other than drilling holes. I was ...
1
vote
0answers
29 views

How are PCB's programmed? [migrated]

So recently I have been looking into prototyping my arduino project and there are a lot of tutorials online on how to take your Arduino and using a software such as Eagle to make a PCB layout but I ...
1
vote
1answer
38 views

Drill size for thermal via (and how many)

Following my previous question, I'm putting via's under an SOIC-8, the thermal pad is 0.12 x 0.09". So how big a drill and how many thermal vias? I was talking to a smart guy at work today. And he ...
-3
votes
0answers
41 views

PCB fabrication in Gerber files

I designed my PCB Fabrication in eagle, but not sure how to generate Gerber files, so anyone can help? I need to order the board ASAP.
10
votes
3answers
668 views

What are these cream plastic-like blobs on my circuit board?

I see these white/cream colored blobs all over the board (I've surrounded them with red rectangles in the image above), something which I've never encountered before. They're plastic like in texture, ...
0
votes
1answer
35 views

Pre-paired bluetooth chips

Is it possible to buy two pre-coupled bluetooth chips? So all i have to worry about is sending USB/Serial data to the master node.. Best regards, Morten
-2
votes
4answers
113 views

Output of voltage supply drops to about 1V from 5V

I have fabricated a PCB board. It consists of the following circuitry: 9V - 78L05C - (a circuit consisting of resistors, opamps, comparators, analog multiplexers). I have attached the pictures of ...
0
votes
2answers
68 views

PCB via, increase annular ring or increase hole size?

I have to use via to route small analog signals. If I want to minimize the effect of via on the signal, should I increase the annular ring size or hole size. Lets say the total via diameter is same in ...
1
vote
0answers
27 views

Place logo on Top layer in Altium

I use the "PCB Logo Creator" script to convert my BMP logo and import it into the top layer. It works well. But I don't want to do this "conversion" every time, so I made the generated logo to a part ...
0
votes
4answers
94 views

PCB Ground Plane

I am designed a PCB in Eagle and I am new to doing this. I have created a ground plane on the bottom layer that covers the whole board but I still have a few traces running through the bottom layer ...
2
votes
1answer
144 views

What's the meaning of the “key” symbols in Altium?

I'm routing a PCB board with Altium. Today I find when my mouse hover on the pads, it shows some shadowed "key" symbols. What's the meaning of them?
0
votes
1answer
35 views

Eagle Cad: change default drill size list

Eagle Cad specifies certain drill and hole sizes, for example, used for VIAs, when routing. I know that I can enter the drill size in the combo box and it will be remembered. But all the other ...
0
votes
2answers
34 views

How to fix line to line spacing error in Allegro?

I have a line to line spacing error in Allegro. I don't know how to fix it. If I make the width of the trace smaller, it gives me a line to width error. And I also don't understand Why I get this ...
1
vote
1answer
29 views

Effects of encasing bluetooth chip and rechargeable battery in an adhesive encapsulate?

I am thinking to encase my entire bluetooth PCB along and connected battery in an adhesive such as a soft urethane or silicone encapsulate. My board and battery are each about the size of two stacked ...
0
votes
2answers
59 views

Desoldered Resistors on rotary encoder breakout can I just short them togather

Someone gave me this rotary encoder breakout, but they unsoldered the SMT resistors for some other project. Now I don't have any SMT resistors on hand and can't justify buying a roll of them. So would ...