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)

-8
votes
0answers
44 views

11-lead TO-220 package & 16-pin MSOP eagle parts [on hold]

I need to realise a circuit with opa2544 amplifier it is an 11-lead TO-220 package so I search on any part with the same package on eagle to realize a layout but I can't found anyone also I need a ...
0
votes
2answers
37 views

Altium: how to explode an imported 3D model

I've imported a 3D model of an enclosure and I want to check if my PCB will fit inside the box but I can't "open" the box inside Altium. How can I explode or take a 3D model apart in Altium?
-1
votes
1answer
65 views

How to make an enclosure for my PCB [on hold]

I am thinking of launching a product, and I need to make a nice enclosure. When I asked the Chinese for prices , it was 4500-5000USD for an injection mould. I see tons of Indiegogo projects which sell ...
1
vote
2answers
43 views

PCB Trace Impedance - Multiple Layers

I'm in the process of designing an 8 layer PCB with a stackup of: Signal, GND plane, Signal, Power plane, Power plane, Signal, GND plane, Signal. For calculating the trace widths necessary for ...
0
votes
3answers
57 views

Why do smd components in eagle have padding?

I'm new to eagle and I don't understand why there is a small padding to the left and right of some SMD components (for example the 0402 cap in the image). Having the physical board in my hand ... ...
0
votes
2answers
85 views

How to connect multiple micro-controllers' USB ports on the same PCB?

I'm designing a PCB with 3 Atmel ATmega16U4-AU micro-controllers on it. I will be programming them through SPI. Therefore, I will not be using D+ and D- ports on the USB interface. Then how do I ...
-4
votes
1answer
41 views

How to know the voltages between inductors? [on hold]

I've got a schematic as below, but I don't know what voltage is a output. simulate this circuit – Schematic created using CircuitLab
2
votes
2answers
299 views

Non plated through hole to PTH

I have defined Plated through holes on my PCB design.But somehow my pcb manufacturer has drilled it as non plated through hole and PCB has arrived.Now I need a suggestion to convert this non plated ...
1
vote
1answer
41 views

Warm/hot starting a GSM/GPS module

I am new to electronics and trying to understand how a "warm/hot start" works. I am currently working with someone to design a PCB schematic for the SIM928A, a GSM/GPS module. In the hardware design ...
-1
votes
0answers
18 views

power distribution and interfaces bridging between set of boards in the system [on hold]

Here is concept of autonoumus quadrotor control system composed as set of open source (mostly) projects. Look at the picture. The heart of that system is Zynq-7000 based Z-turn board (top of the ...
0
votes
1answer
31 views

pcb power connector lipo [on hold]

I have liPo battery with TAMIYA/TRAXXAS/DEANS/EC3 male adapters. Look at the picture: But there is no luck to find some compatible pcb surface mount female connector to power up my board from liPo ...
0
votes
1answer
39 views

Battery voltage drops when connected to PCB

I have a circuit containing an atmega328p microcontroller with hc-05 bluetooth module. microcontroller is powered via 7805 regulator. When 7805 is supplied the source voltage by a 9V battery, the ...
1
vote
1answer
71 views

I designed a PCB in Fritzing, but forgot to mirror it. How do I fix it?

I designed my first PCB in Fritzing, intending to have it milled at the local hackerspace (they want Gerber files) and then assemble it with THT components. But now all the copper is on the top side ...
-1
votes
1answer
35 views

Impact of positioning of heatsink [closed]

We have assembled a few copper heatsinks, which are custom made. The position of heatsinks in Pcb is in-between the drain terminal tab and Pcb pad. The mosfet is operating less than 100khz range. ...
0
votes
2answers
30 views

Merge polygon pours in Altium Designer

I need to know if there is a way to merge two or more polygon pours of the same type, in order to have only one. So two objects that become one. Is this possible? Because anytime I need to redefine a ...
1
vote
3answers
363 views

howto align mount holes in 2 pcb the right way?

I'm tring to make some sort of shield board (it's not an arduino): first board was made in orcad, I have source files gerbers and so on... I'm making a 2nd board in eagle. When trying to align the ...
0
votes
1answer
42 views

Heatsinking a TO 220 Case

There are modules that I have purchased that are already built on a PCB, and I would like to integrate them into my board. There is a TO-220 case which is a transistor on the bottom side, and it is ...
0
votes
1answer
96 views

Does a motor really need all this circuit to run?

This is the pcb of an Ikea screwdriver, you can see I desoldered the 18650 battery, from B+ and B-, and desoldered the motor from the legs of the switch which is on the other side. So the circuit ...
0
votes
1answer
25 views

How to remove pin name from Eagle Device Page? [See Image]

How to remove those pin name from Eagle Device Page?
23
votes
1answer
942 views

Unusual chemical reaction on PCB (SMPS circuit)

I have a PCB with smps circuit on it 220V to 5V (using Viper22a). Here is the schematic: And here is the board layout: In the yellow circle region, I am seeing some sort of white deposition in a ...
1
vote
1answer
44 views

Printing PCBs using conductive paint? [closed]

Has anyone tried to use a programmable cutting machine like a Silhouette CAMEO to cut a stencil for a circuit and then used conductive paint to transfer it to a board? Could that work? What kind of ...
2
votes
1answer
86 views

Is one big PCB cheaper than multiple smaller ones, if so how to do this in Eagle PCB?

I have heard/read somewhere that one bigger PCB is cheaper than multiple smaller PCBs, is this correct? If so, then rather than order seperate PCBs for different parts of a project e.g main board ...
2
votes
2answers
76 views

Principles for premature failure analysis of PCB tracks and vias

I have just given a task to implement a setup to detect whether or not a track or via on a PCB is going to fail in any time in the future. The PCBs are supposed to be used in harsh environment e.g. ...
0
votes
1answer
54 views

Should vias really have bridges?

I have been always using bridges with vias. I gues that doesnt hurt but recently I though is it really necessary? I know that they're purpose is for the soldering process to be easier, otherwise ...
0
votes
1answer
56 views

How to remove this board to board connector? (Home Theater Amp)

I am trying to revive a months-dead home theater amp/audio unit (Panasonic SA-XR50) that a family member cooked after a move and was not sure what "OVERLOAD" on the front panel meant before it went ...
2
votes
1answer
74 views

Creating a PCB mount RJ45 male plug

I am wondering on how one could build a male RJ45 connector with PCB Mount. I searched and, as I expected, I did not found any existant connector like this. However, I found this interresting item : ...
1
vote
1answer
20 views

Create breakout for iM880A-L

I currently need to work with the iM880A-L. As it is annoying and shaky to solder that thing on perfboard and attach cables, I want to create a breakout board with JTAG and SWD plug and pins for all ...
0
votes
0answers
42 views

DisplayPort cable 2.5V for non standard use

I want to use a DisplayPort connector and cable for transmission of a custom 8b/10b protocol (not the DisplayPort protocol). Does anyone know if these cables are good for use at 2.5V instead of 3.3V ...
1
vote
1answer
49 views

LMR10510 - Simple switcher “breakoutboard” output measures 0V

I have a problem concerning this Simple Switcher found here. I used the design example 3 for the LMR10510Y found on page 17 of the datasheet, however measuring the output pins of the switcher returns ...
-6
votes
2answers
80 views

Chip vs printed circuit board [closed]

What is the difference between a chip, wafer, and PCB? Are PCB individual components cut out from bigger wafers?
-4
votes
1answer
85 views

Help identify part

Anyone know what this is, I need the particular part name. The photo is of an audio amplifier:
2
votes
2answers
348 views

Accidentally removed SMD pad

I had been attempting to desolder some SMD ceramic capacitors off a PCB to measure their capacitance. Unfortunately I am quite new to soldering and have managed to screw up. The below picture shows ...
-5
votes
0answers
46 views

a circuit consisting an alarm which helps to switch off the stove before milk boils and spills out of the sauce pan

I need to know whether the following idea works? I plan to make a lid which has a circuit mounted on it with a buzzer and 9v battery.An adjustable bolt is also screwed on it.one end of the battery is ...
-1
votes
1answer
97 views

How is the microcontroller on this dev board programmed?

I am trying to understand this schematic page 36-41: Tiva™ C Series TM4C1294 Connected LaunchPad Evaluation Kit. I would like to know what path the serial stream of "code" follows from the usb ...
1
vote
2answers
64 views

Grounding options between three PCB's

I have a PCB (let's call it PCB #1) that has a Li-ion battery as its power source, sourcing 12V to 17V. The power from the battery is used to step down to 6V using a buck converter on PCB #1. A cable ...
0
votes
0answers
20 views

RGMII Length actual maximum

The specification for RGMII states recommended maximum trace length of 6 inches. In the lab we have cables up to 10.5 inches carrying RGMII signals. Has anyone actually tested RGMII's maximum length? ...
1
vote
1answer
80 views

When to stop working on a PCB layout

I currently have this PCB layout for a project: Now I'm unsure if I should invest more time to get rid of some vias or if I just should finish it off and order the board. Do vias matter for such ...
2
votes
1answer
83 views

What kind of motor to use in a PCB drill?

I'm trying to use this super-cheap PCB drill that I bought recently, but it's too weak for human convenience (takes about 10 seconds to get through standard 1.6mm FR4). The drill uses a small DC ...
5
votes
5answers
98 views

How to test SMD bluetooth modules without soldering them to a board [duplicate]

I have made a costum PCB with components and a WT51822-S2 bluetooth module. After testing, there seems to be a low percentage of modules that have a fault in them. Since they are SMD modules, with ...
2
votes
2answers
80 views

Coin cell battery retainer, problems and best practices

I use Memory Protection Devices BK-913 CR2032 Through hole battery retainer. I use Adafruit's CR2032 PCB footprint, which is almost identical to the recommended footprint in the datasheet for the ...
6
votes
3answers
938 views

How do pick and place machines pick up components?

I first thought they used a vacuum of air so they don't dislodge the components after they've placed them?
1
vote
0answers
42 views

RF Inductor orientation

In RF PCB design ~1GHz, when should I worry about orientation of inductors in relation to the magnetic fields, I have seen application notes from manufactures where they pointed out, that it was very ...
1
vote
2answers
66 views

On board signal termination

and thanks for bothering with my problem. I have a two signals A and B that I want to route using several alternative paths via jumpers on my board. In one of the occasions I need to use the same ...
0
votes
1answer
78 views

Alternatives to mounting tube sockets on a PCB

It occurred to me that since tubes get inserted and removed that this could cause some flexing in the board and break things. Whats the alternative to not mounting it on the PCB for a more physically ...
6
votes
6answers
1k views

PCB 90 degree angles [duplicate]

Not a dup of which barely attends to the technical reasons for or against using 90 degree routes. As a hobbyist who's enrolling in an EE program in the fall, should I just get in the habit of ...
1
vote
3answers
131 views

Can I use this 950° soldering iron on electronics?

I purchased this soldering iron yesterday and after doing some research I'm not convinced it is safe to use on electronics. It doesn't state the wattage anywhere and I can't find it online. It only ...
0
votes
0answers
33 views

Clarification on decoupling capacitors placement

I've seen a lot of conflicting advice regarding FPGA decoupling capacitors and decoupling in general and wanted to double check that I'm doing it correctly. So I'm directly connecting the power pins ...
4
votes
1answer
98 views

Optional feature in PCB layout of MMCX board edge connector. What's it for?

I'm designing a circuit requiring MMCX board edge connectors, specifically using the Molex 73415-0961 jack. When looking through the datasheet for suggested PCB layout, I see mention of an additional ...
1
vote
1answer
75 views

Altium Designer - Printout templates

When i've to generate PDF files with printout layers, i must always add the missing layer i need. For example i usually draw the board outline on keepout layer, so everytime i have to add the keepout ...
1
vote
3answers
79 views

Given only a gerber file how do I automatically find out the number of pads that are there on the PCB

I am building a website right now , and am trying to automatically calculate the number of PCB pads that are there given only a gerber file. One way is to manually review this. Is there any other way ...