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

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29 views

Problem with massive gerber files from Eagle

I'm trying to export an 8" square design that is mostly copper to a gerber file but the board house is complaining that the front copper layer is crashing their software since its about 14mb. Is ...
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2answers
22 views

Altium clear region

I have a four layer board: Signal, GND (internal power plane), VCC (internal ground plane), signal. My design includes a chip antenna that requires a completely cleared region at the edge of the PCB. ...
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3answers
80 views

Securing a pcb to be used in a keyboard to its case

I'm looking for a way to secure a pcb I will be making for a cherry mx (homemade) keyboard to a case which I'll also be making. Obviously, I don't want the pcb to move. I could use standoffs/screws, ...
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1answer
45 views

interface component for screwing to make electric contact

Is there a component that allows you to stack two PCB on top of each other and screw them together to make electric contact? Thanks!
2
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2answers
203 views

whatis the difference between mounting holes and through holes?

I am new to pcb design, and I am using eagle for this purpose. I am confused by mounting holes and through holes. They are all holes, what's the difference? In eagle, layer of drills(layer 44) is ...
11
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2answers
494 views

How are vias made commercially?

How are or were vias made commercially? Wikipedia (http://en.wikipedia.org/wiki/Via_(electronics)) mentions "The hole is made conductive by electroplating, or is lined with a tube or a rivet" Can ...
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1answer
39 views

Is there risks or limitations to install driver board under a pinball playfield?

I'm currently designing the electronic for a pinball. I would like to reduce the usual cable mess under the playfield. I'm thinking of creating small driver card that handle small amounts of switch, ...
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0answers
34 views

PCB Identifying Ground [closed]

This should be very simple. I believe I know the answer but can't afford to be wrong. I have a simple desktop video card which uses spdif in for hdmi audio. There are 2 pins the cable plugs into. I ...
2
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1answer
121 views

Brown PCB Traces - Explanation?

I just received my first PCB back from the manufacturer. After soldering on the SMT components I found that the board works absolutely fine. The only thing I'm puzzled about is that both the ground ...
6
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1answer
91 views

PCB layout for 8-16MHz crystal very near WiFi module AND small DC motor

I'm designing an "Internet of Things" appliance where space and layout are constrained by mechanical and cost requirements. The main processor is a PIC18 and its crystal (probably 8MHz, maybe 16) is ...
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1answer
60 views

Correcting printed PCB (add a via)

This board is a prototype for the project and is for testing. It is missing the soldermask and silkscreen layers, so correcting mistakes is very possible. The board was printed correctly, but somehow ...
2
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1answer
201 views

Differences between mini USB and micro USB in circuit design?

Hopefully a quick and silly question - I am looking to modify a reference design such as this one: http://www.microbuilder.eu/Files/Projects/LPC1343RefDesign/LPC1343_Schematic_v1.6.pdf And was ...
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0answers
61 views

Half a meter long camera cable

I'm currently in a project using an image sensor but I'm a bit stuck at this moment. My current design consist of an image sensor OV2640 connected directly to a SIM5218 which stores and sends ...
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0answers
27 views

How to calculate wiring tolerance when dealing with high frequency signals

guys. I am designing a DA board that treats digital signals up to 300Mhz. What I learn from book is that I have to concern signal integrity problem when the signal is quicker than 100Mhz. So I plan to ...
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1answer
52 views

Headphone jack PCB connection

Im connecting a PCB mounted headphone jack to a circuit Im designing that takes a gnd, V+ and V- input from the 3 way 3.5mm headphone jack. However when I read its data sheet it has three connections ...
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3answers
144 views

Microcontroller programming: do I need vendor's IDE?

I am very interested in the following ARM Cortex-M0 microcontroller: http://www.nxp.com/products/microcontrollers/cortex_m0_m0/lpc1100/LPC11U24FBD48.html#overview However I'm turned off at the ...
1
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1answer
99 views

Designing/looking for a circuit board for a vaporizer

I recently decided to look for/create a board for a vaporizer and have no idea where to start. I will probably end up programming the program in C or C++. To better explain this, I will explain the ...
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2answers
75 views

Connecting copper pours in Cadence (OrCAD) PCB Designer

I'm trying to climb the Cadence learning curve, coming from an Eagle background. My board is four-layer, with a ground plane underneath the top layer. I have a surface mount IC that has an exposed ...
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1answer
33 views

Eagle PCB: how to get BOM from a library part?

I am using a library part in my Eagle PCB schematic. I would love to learn more about what's inside / what sub-components the library owner used to make it. Is there any way to do this? For example ...
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3answers
129 views

How to uniquely identify which PCB is plugged in / connected

I am designing a board (Main PCB) into which any one of about 60 slightly different boards (Peripheral PCB) may be connected/plugged-in. The challenge I'm facing is to autonomously identify which of ...
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1answer
156 views

Identifying an IC with markings: 0270000 DCP1227 0601

I have a chip on one of my boards, and I cannot identify it. I tried differnet variations of search patterns but I cannot find it anywhere. The marking on the chip are in three rows as following: ...
2
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2answers
94 views

Minimal distortion in transmission line

In a transmission line, the condition for minimal distortion (caused by the line) are when (R/L = G/C) in the line, right? However, I don't see any reference to that in any application notes or ...
2
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1answer
54 views

Eagle PCB: “No Supply for Power Pin …” error

I am new to Eagle and trying to wire up a schematic. I have an IC and the first basic task I'm doing is connecting ground pins to a GND symbol. Here is what I tried with the error: (Note: I'm ...
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2answers
41 views

Best temperature storage IC? EEPROM or SRAM IC

I am trying to integrate a temperature sensor along with the storage capability with it. Both temperature sensor and the storage device will be controlled by FPGA. Which device would be the most ...
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0answers
15 views

Issue booting the TE0701-03 with USB

I'm trying to get a TE0701-03 board mounted with a TE7020 Zynq to run on my computer (Windows 7). I have the board powered up but when i try to connect it to my computer, using a USB cable (to the ...
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3answers
63 views

Converting a circuit from Multisim into a PCB

I drew this metal detector circuit in Multisim. How can I make a PCB board from it? Is there an option in Multisim to convert it to PCB or do I need another program?
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1answer
88 views

Will motors cause more noise when connected to a ground plane instead of directly to batteries?

I am making a small robot using an Arduino and two servo motors. There are two ways that I can provide power to the motors: 1) Run power and GND wires from the battery holder to the motors, then ...
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40 views

Relation between thermal resistance and via diameter

I have a power loss of 1W. I distribute that 1W into all solder pads such that there is even distribution of heat (solder pads are my heat source), according to the formula below: $$Heat \, Loss = ...
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69 views

PCB voltage and current

I am building new project, which I will power up the water tank heater from my smartphone. I have few safety though I want to ask here to get your opinion.. I am going to use AVR to run a relay, that ...
2
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1answer
108 views

What IC is in this particular black blob on my pocket calculator? [duplicate]

I've taken apart my pocket calculator, and I'd like to know what IC is inside the black blob. Is there an IC commonly used in such applications?
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1answer
38 views

Is the Delay in Strain Data Due to Capacitance?

I have designed a sensor board which gives a strain o/p based on wheatstone bridge principle(change in stress is measured through change in resistance). But the starting value is not at zero level,it ...
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0answers
82 views

Simplest possible hardware debounce

I'm building a 737 EFIS panel and I'm looking on some input on my debouncing circuit. I wanted something simple (So no Shcmitt stuff) but still done in hardware because i want to use interrupts for ...
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2answers
80 views

What power strategy should I use for this board? [closed]

(Similar but not quite the same question here. ) I'm repurposing an existing synth board which is powered like so: -15VDC GND +12VDC I'd like to power it ...
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1answer
76 views

Custom PCB for USB to Serial output?

I'm really quite a beginner, so bear with me. :) I'm starting to work with RF transmitters, and I only have one Arduino (It's an Uno R3). I have the transmitter and receiver set, but without another ...
6
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1answer
121 views

Tying ground planes together with a non-zero Resistor

I was reviewing the schematic of a motor driver board and noticed that the digital and analog grounds are tied together with a 3.9 ohm 1/4 watt resistor. I am still trying to find the gerber files to ...
9
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2answers
426 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?
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1answer
84 views

FR4 measurement tolerances

I am going to get a PCB produced, but was wondering how the FR4 thickness measurements work, i.e. how thick are 1.6 and 0.8 FR4, in millimeters, to a few decimal places?
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2answers
191 views

Is this a good layout for a 5A buck converter?

I have updated this question with the suggestions in comments and answers. Make sure you read everything. I want to make a PCB for a switching regulator (buck converter). It's a TL5001-based ...
4
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2answers
169 views

What are the most common data storage devices in small consumer electronics?

What are the standard ways of data storage in small consumer electronics (routers, phones, etc.)? For simple devices I guess microcontrolles with in-system programmable flash are enough, but for ...
17
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5answers
1k views

What reasons are there to avoid vertical through-hole resistors?

I'm working on a layout for a PCB and I need to include a handful of pull-up resistors. The board I'm working on will be a proof of concept, and it is likely I will only need one (and order two). That ...
1
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1answer
53 views

Standing Wave Ratio(SWR) Measurement

I'm trying to find a way to measure SWR digitally. Generally SWR is measured with analogue equipments and it is not practical on self designed PCB. I did not find so much resource on how to do it ...
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0answers
52 views

Orcad Layout plus 10.5 RCA Footprint

I am new to Orcad 10.5 and I am designing a PCB. I used an RCA jack in my project but I can't find an RCA package in Layout Plus. Can you help me with this problem?
8
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3answers
201 views

When should I use a ground plane?

I am new to PCB design. My circuit contain a voltage of 3.3V, maximum signal frequency of 400 kHz and less than 10 components connected to ground. Do I really need a ground plane in my PCB? Or to be ...
2
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0answers
37 views

How is CC3000 placed in Simple Configuration mode?

I've ordered a CC3000MODR and soldered it to a simple breakout board. In the First Time Configuration it mentions a Simple Configuration mode: The CC3000 is placed in Simple Configuration mode and ...
6
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2answers
142 views

Soldering guidelines for freezer applications?

I'd like to do a home project where I take temperatures inside of my freezer and inside liquids. Liquid-compatibility aside, I'm mostly curious about whether or not anyone can recommend some best ...
1
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1answer
46 views

Calculating Signal Loss (dB) Through Vias

Does anyone have any useful calculations or links to material covering good ways to calculate signal loss through vias? What would be perfect is a graph with typical loss in dB over the range 1GHz ...
4
votes
1answer
65 views

Replace SMA Connectors with Direct Connection

I am combining the layout for two PCBs, one with an RF output SMA jack, and the other with an input jack, into a single PCB. We were originally connecting the separate boards with a ~3" segment of ...
2
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4answers
518 views

Advice Needed On Removing Stubborn Circuit

I'm new to soldering and I've done some research on what I need in terms of material and tools and what I need to do in terms of removing and replacing a circuit. The circuit I'm replacing is a Laptop ...
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1answer
98 views

How can I quickly build PCB prototypes? [duplicate]

The development cycle of the company I work include building alfa prototypes, sometimes in breadboards, and beta prototypes in printed circuit board assembly. A considerable slice of the development ...
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1answer
157 views

How to solder a connector when spacing of PCB pads is not equal to spacing of component pads?

After delivery of my PCB, I realized that the spacing of PCB pads is not equal to the connector pitch (the PCB footprint is bigger than the OLED connector)! (sad) Look: Any idea how to solve this ...