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)

1
vote
1answer
38 views

microcontroller bring-up

I'm in the process of assembling a microcontroller PCB design. It's essentially just a breakout board. I'm trying to think of the best way to test the board after assembly. My first thought is to ...
1
vote
0answers
41 views

PCB layout for high side switch (high current)

I'm working on a PCB layout for two high side switches. You can see below a picture of my current layout. The copper weight of the future PCB will probably be 2 oz/ft² (double sided). I use two ...
2
votes
2answers
279 views

PCB Design - dashed lines on layers

While taking a look at some other peoples PCB designs I noticed something that I haven't seen yet. In some designs, I see regions marked by unconnected, small dots on the signal layers. Here are two ...
1
vote
3answers
76 views

100W Soldering Iron Risks And Arduino

So I bought a 20W soldering iron a while ago and I found the experience very frustrating as the tip does not get hot enough quickly and when it does melt the solder it gets cold so quick I cant get ...
0
votes
3answers
75 views

Can this circuit board be repaired?

This is a board out of a Super Nintendo game cartridge. It appears to have damage from a few of the leads, and this game definitely doesn't work when tested. The game is very rare and worth my time ...
0
votes
1answer
62 views

Question about MCU's, and Audio Manipulation

Ok, so I've been doing some research trying to find something like an audio MCU\DSP with a built in audio filter; for instance, something that I could manipulate audio with to get a final filtered ...
3
votes
3answers
72 views

What is the easiest way to stagger a signal chain on a stack of identical boards?

I am designing a stack of identical boards that each generate an analog signal. What I am trying to do is take the signal from the board above, mix it with the signal from this board, and then send it ...
0
votes
3answers
75 views

How to order a custom PCB

I need a tiny PCB for a tiny IC. Is this something I have to design in autocad? Do I have to go to a shop to print it for me? Ultimately I want to be able to flux solder the IC on the tiny board so ...
0
votes
3answers
86 views

Working with a tiny IC

I have recently purchased several Atmel's touch sensor IC's AT42QT1010 which are extremely tiny (1.6mm x 2.9mm) and I would like to be able to mount them on a breadboard. I have tried soldering them ...
0
votes
1answer
30 views

Dupont connector for 5A

I have to do a connector adapter, that has to handle 5A current, from a pwm motor driving circuit(power mosfet), to the motor. I have not found the current rating for dupont connectors It is ...
0
votes
1answer
41 views

Voltage regulator VS power supply

I made a circuit with some components (arduino, wifi board, ultrasonic sensor, sound sensor, light sensor, temperature sensor, humidity sensor, some leds and other components) on a breadboard. The ...
0
votes
2answers
42 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 ...
0
votes
1answer
47 views

PCB software and companies that make [closed]

I am looking for a free software tool to make PCB for my circuit and submit it to a company to make it. My circuit components include surface mount devices and antennas. Any suggestions.
1
vote
0answers
44 views

Cooling the IC on a board printed by hand

I'm building a battery charger circuit with BQ24278. The battery draws 500mA minimum and 2.5A maximum current; therefore, I must prevent IC from overheating. I printed the board onto single sided ...
-6
votes
0answers
33 views

It's possible to update set top box receiver IR hex code(remote) via USB or any method [closed]

I wanna to know about SET TOP BOX(satellite tv receiver) IR codes where itz saved in set top box and it can be updatable by USB port or download by satellite dish download linking. And the HEX ...
1
vote
2answers
40 views

How should I design a schematic component for a component library?

This is my first time making schematic components, of which I will then be making the footprints for PCB designs. I'm using KiCad. I don't know the best "layout" for the components I'm making. For ...
3
votes
1answer
75 views

PCB Short Issue

I recently designed two boards and had them manufactured for a project I am working on. Before I soldered any components, I checked the continuity of some of my connections and discovered that there ...
0
votes
1answer
33 views

VCC powerplane layout

On a 4 layer stackup with signals routed on top/bottom; 2nd layer VCC powerplane; 3rd layer GND powerplane. How should the VCC powerplane be layed out? Should it be surrounded with a few mm of GND ...
0
votes
3answers
29 views

Connections for Panel Mount 12VDC Power Supply

I'm using a 12V Panel Mount Power Supply, taking a 110/220VAC input and giving a 12V/5V DC output. What is the best practice for connecting this power supply to the AC mains? And how should this ...
-1
votes
0answers
31 views

sizing of trace of pcb? [duplicate]

Dose any one have example (picture) of real pcb board of various size traces .like 40th 60th....etc.actually i designed pcb on software as my term assignment .but i want to which width looks like how ...
0
votes
1answer
48 views

STM32F411 Nucleo board - what the ferrite bead is used for?

I'm trying to design my own pcb for the stm32f411 and when i saw the datasheet of the stm32f411 ( http://www.st.com/st-web-ui/static/active/en/resource/technical/document/datasheet/DM00115249.pdf ) ...
0
votes
1answer
29 views

Question about Audio signal trace layout (TLV320AIC3204)

I am using the TLV320AIC3204 in an audio project. The part is a stereo audio codec from TI. I'm curious about how the traces are to be laid out. With other chips such as the AD1939, you need to ...
3
votes
2answers
160 views

Cleaning filthy PCB pads

I am looking at this PCB board I've got and these pads are terrible looking. It still works, but this sure doesn't look right. What can I use to clean those up?
0
votes
1answer
49 views

Is it mandatory to use thermals in hand soldered PCBs?

I understand thermals are used to prevent tombstoning during oven soldering by allowing all pads to heat up more evenly, but are they necessary when the PCB is going to be soldered by hand? Consider ...
0
votes
2answers
58 views

How to apply temporary pins to PCB

I want to temporarily solder a pin on my pcb where I know for a fact that it's going to be moved soon. Is there a better way? Is there like a plastic piece I can attach to the other side of the ...
0
votes
2answers
49 views

Component naming conventions [duplicate]

Some very common parts have standard acronyms on schematics: resistors are usually named R#, capacitors C#, and integrated circuits U#. Is there a typical standard for these names? If I want my BOM ...
0
votes
1answer
70 views

How can I link battery life to resistivity of a phone PCB?

Are there any equations/relevant explanations that can link resistivity of the "wiring"* (or other components) on a phone's PCB to its battery life, i.e. can I prove that using silver wires would ...
0
votes
1answer
30 views

Proteus Ground Plane with thin trace in Pad

I am doing a project on Proteus Ares and applying a ground plan. However, the points of the terminals that are connected to ground to ground-pad connection is by a thin trail. Is there any way to ...
6
votes
1answer
100 views

What design limitations does a higher-than-average resistance trace impose?

There's a Kickstarter running right now for a machine that prints circuit boards. Rather than a traditional etching process, they use conductive (silver-based) ink to print traces and pads. It has a ...
2
votes
0answers
52 views

LED module design considerations for an aluminium board

I need to design a LED module something similar to below. Could anyone who is experience tell me if there is any SW (or tools) to determine how to place the LEDs to have a good and evenly ...
3
votes
1answer
85 views

Are there any disadvantages to having a thicker PCB?

Similiar to the question What are the advantages and disadvantages of thinner PCB thickness (<1.6 mm)?, but going the other way. If we look at the picture in the previous question's answer, we ...
1
vote
3answers
117 views

How safely to send signal between logic and higher current pcb?

I'm designing a PCB with 4 FETs. These are driven in the same board by totem pole drivers, and their load are about 5A total. I am using PWM at 1000Hz. The signal comes from a logic IC in another ...
1
vote
1answer
54 views

why is the ic rf shielding exposed

I assume this rectangle around the IC is for RF shielding, but why when is it exposed? I have seen this occasionally and I am not sure of it's exact purpose or why its exposed. Googling the title ...
4
votes
2answers
245 views

Can a via go in the middle of a trace?

Is it a bad practice for any reason to put a via in the middle of a trace? For example, in terms of impedance, or reflection? I have a power trace which I need to get across a bunch of signal traces ...
1
vote
1answer
34 views

How to PCB layout WM7230 MEMS digital microphone?

I'm trying to figure out how I'm supposed to get traces to the four internal data pins of the Wolfson WM7230 Digital Microphone part. It's got a ground ring that is supposed to have a tight solder ...
6
votes
2answers
98 views

Mixed Signal PCB, 2 or 4 Layer?

I'm currently designing a mixed-signal PCB for a client and I've been reading a lot about signal integrity and most of the books recommend a 4 layer board (or more) because of the noise resistance ...
1
vote
0answers
69 views

How to remove silk screen from PCB?

Last batch of PBCs I got from a manufacturer had some silk screen splashes (dots) all over the board ruining the design. I don't have and don't want to have any silk screen on the board. The whole ...
3
votes
3answers
104 views

What does this symbol with white rectangles around my vias mean in Altium?

I'm doing a PCB in Altium and I don't know what these white rectangles beside my vias are meant to indicate. A screen shot is below:
0
votes
5answers
85 views

Vias in footprint with no thermal relief?

I'm making a small board for a PIC18F26K22 microcontroller and the provided footprint in Microchip's Altium Vault is shown below: I'm assuming the polygon under the IC is a GND pad, but am not 100% ...
4
votes
0answers
117 views

Things to be aware of when using voronoi shaped traces

I was thinking of giving voronoi shaped traces (e.g. http://publications.csail.mit.edu/abstracts/abstracts05/rus/rus.html for those who need an example, or just google image search it) a try. In ...
11
votes
2answers
255 views

How much larger should a plated-through hole be than lead diameter to get good solder wetting?

I'm designing a new PCB where I have a whack of connectors that have to line up with the metalwork. These are a two-piece Neutrik XLR connector where the insert is soldered to the PCB and then mates ...
7
votes
2answers
567 views

How to determine the power supply needed for a PCB

I am doing a project in PCB design and I am fairly new on this. The board I am creating has various components among them an Ethernet, USB controller some DDR memory and an FPGA. I have found ...
0
votes
0answers
44 views

Over 100 pins ic packages in Eagle [duplicate]

I want to use Eagle or Kicad to design a board using Maxim chips MAXQ1103 and MAX32550 http://datasheets.maximintegrated.com/en/ds/MAXQ1103.pdf and ...
1
vote
2answers
80 views

Explanation for super-sensitive loose contact inside potentiometer?

Symptom I have a mixing console, where one 6-pin stereo pot is errartic. When I turn it all the way down I sometimes can still hear the left channel at full volume. Explanation The circuit is a ...
0
votes
1answer
24 views

What is the recommended exposure time for presentisized positive photoresist board? [duplicate]

What is the recommended exposure time for presentisized positive photoresist board using UV light, fluorescent light, CFL bulb and (will it also work with LED light)? How do we also determine if the ...
2
votes
1answer
135 views

Recommended Footprint width smaller than actual pad width

I was just about to create a footprint for a Kingbright LED from the KP-2012 series. From looking at the data sheet I am somewhat irritated: As you can see, the package pad with is 1.25mm, while ...
2
votes
1answer
80 views

Should vias be used for every GND connection?

When making a two layer board with the bottom layer being a GND plane, should every GND pad for ICs and passives be directly connected to the GND plane using a via, or should I route all of the GND ...
0
votes
2answers
103 views

Finding serial port on generic IP Camera PCB

Background story is that during firmware update of a generic IP Camera, with great wisdom, I managed to wipe part of the embedded Linux files, and in order to recover it, I need to access the ...
1
vote
1answer
69 views

Load capacitance for a microcontroller crystal?

I know there are lots of similar questions on here, but I've read many of them and am still a little confused. I'm a student making a board similar to the Arduino Pro Micro, using a Atmega32U4 ...
0
votes
2answers
85 views

How to measure trace impedance?

I have seen that trace impedances in PCB's are maintained 50 ohm & so on. How to measure this impedance using a simple multimeter?