Questions tagged [board]

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31
votes
11answers
17k views

What is the most amazing PCB artwork you've ever seen?

Have you ever looked at a PCB and burst out laughing? Have you ever looked at a PCB and said "Wow, that is amazing"? Have you ever seen a PCB that artistically expressed criticism of society's ...
24
votes
8answers
3k views

LEDs on boards - pros and cons?

OK - I tend to design high value low volume boards so my view of this is biased. I like to sprinkle a lot of LEDs around my boards. One (red) LED for every power voltage on the board. Multiple s/w ...
16
votes
4answers
5k views

OK to connect boards perpendicularly like this?

Are there any disadvantages in using the following method to accomplish a perpendicular board-to-board connection? (i.e., any disadvantages in terms of board manufacturing capability/cost assembly ...
15
votes
11answers
38k views

How to cut the tracks of a stripboard

Since I've started electronics I'm using this kind of board for permanent projects: But sometimes it's a bit annoying, especially when I need a line going from the top to bottom of the board. I've ...
14
votes
6answers
1k views

What are some 'gotchas' of high-frequency board design?

I'd like to design a PCB for an analog loop controller.. something with an A/D, D/A, and processor on board. (Either DSP or FPGA, I haven't decided.) Since this should modulate analog signals at 10 ...
12
votes
4answers
36k views

How to easily find or create parts for Eagle schematic/board layout

For Eagle CAD software, during schematic or board layout, how can I search for parts/footprints already created by other people out there, to make my life easier? And if I'm still unable to find what ...
11
votes
5answers
5k views

Are circuit boards necessary?

Can I solder the components together? I just started to learn and I don't have a circuit board.
10
votes
2answers
2k views

What is this waxy stuff?

I just opened up an old piece of electronics. While salvaging, I found a board with this waxy stuff on it? What is this and what is its use? P.S. The substance I am talking about is the lightly ...
8
votes
2answers
4k views

Using copper clad for RF projects

As a novice reading "Build Your Own Transistor Radios" by Ronald Quan I was kind of mystified by the author's statement that using "vector" board would be easier than using prototype boards, but the ...
8
votes
1answer
660 views

Name for this type of connector?

Can Anyone help me to identify this board to board connector? 7 springs connector on top and 8 on the bottom. answer Found a Korean company producing it. Thanks. This is the plug on the other end.....
6
votes
2answers
4k views

Best development board for ARM9? [closed]

I am looking for a cheap but powerful dev board for an ARM9 processor. It needs to be able to run linux. I am unsure about the exact specifications for RAM and such(thats partly why I'm posting this ...
6
votes
5answers
2k views

How do we test reliability and quality so as to minimize the risk of board failure in the field?

We are developing a smart cable for a customer. The market potential is hundreds of thousands of units. The vendor who designs and supplies the boards (with firmware) that will be built into the ...
6
votes
3answers
506 views

Does PCB artwork affect operation and how is the effect validated?

Sometimes PCB designers will draw some art on unused PCB areas. Like here and here. Looks great, but does this affect schema functioning? According to answers to this question an entirely isolated ...
6
votes
5answers
5k views

Good ARM development board for bare-metal development

I'm looking for an ARM development board for bare-metal (no underlying OS) development. Some criteria that I value: 1) External SRAM/SDRAM, at least 1MB 2) External Flash, at least 512kB 3) Built-in ...
5
votes
7answers
10k views

Zigbee starter kit, any suggestions?

i want to start a home automation project, so finally i choose zigbee as the communication system between the devices. I need something easy to start, so, what do you recomend to buy? there is some ...
5
votes
1answer
189 views

Named nets not connected in Eagle board design

I set up my schematic in Eagle and used named nets to make all of the connections. If I highlight any of the connections in the schematic everything lights up properly. When I switch to board design ...
5
votes
1answer
224 views

Do I need some kind of licence or any papers if I want to sell a pcb board that I made to different people?

I have made a watch with a microcontroller and a display which shows a real time clock. I want to sell it to my friends officially. Before I do that, do I have to obtain specific certificates for my ...
4
votes
5answers
2k views

MSP430 programmer

I was hoping you would share with me info on making my own board for programming. I recently came into a handful of MSP430F20xx that I'd like to play around with, but my student budget isn't offering ...
4
votes
1answer
3k views

What item could this PCB board be from? (NOT serious, misc. question) [closed]

This is a fun, light-hearted question and not meant to be taken too seriously. As a little fun thing between a group of friends, we found this question on a desk at work sometime ago about a PCB that ...
4
votes
1answer
4k views

Yellow X in Eagle

I am trying to connect two points of my board with a bottom and top route, connected with a via. Whenever I link the two routes, a yellow x appears. Placing the via on top of the connection doesn't ...
4
votes
1answer
217 views

Dave Jones' uCurrent Gold - trace to shunt resistors has no soldermask

I was going through the uCurrent project and noticed something that seemed unusual to me. In the image, the trace connecting R1 to the input jack is (a) of differing trace widths, and (b) has no ...
4
votes
1answer
1k views

Eagle: use device in schematic, but hide it on board

How can I hide a device on a board, but still use it in the schematic? For example, I want to have relays in my schematic which are on an other board, to make the schematic more understandable.
4
votes
3answers
2k views

Why do most battery protection circuits have 2.5V discharge cap?

I was looking for a battery charge- discharge circuit from ebay, and most if not all, state to have overdischarge protection voltage at ~2,5V. Isn't this way too low? By my knowledge Lithium batteries ...
4
votes
1answer
8k views

Rotate Board and Components in Altium

Can I rotate the components and the board at once? I try hold click + Space bar but it just rotates the component only. Say I already have a 20mm x 10mm board size and I want to make it 10mm x 20mm. I ...
4
votes
2answers
1k views

Kinds of PCB Boards

I'm new to the world of etching PCBs. I etched my first board yesterday, and though it was a success I didn't like the PCB look. I saw this picture (attached) and I like the material of this boards ...
4
votes
4answers
845 views

What is the application of the SMA connectors on the DE2 115 FPGA board

The SMA connectors are expected to be used for clock IO. However, the board already has oscillator and the PLLs can be used to generate a variety of clock frequencies. Besides, for any daughter board ...
3
votes
1answer
3k views

Build ATMEGA16 Board

First of all, I'm a newbie regarding electronics&robotics so please bear with me. I have been working as a programmer for a few years but I just got interested in playing with microcontrollers. ...
3
votes
1answer
3k views

SOT23-5 Package vs SOT23-5L…Differences?

I'm designing a board which uses an LDO that comes in the SOT23-5 package. I have these parts in my possession, and on the part label (from Digikey) it displays that it is a SOT23-5, which makes sense....
2
votes
3answers
2k views

Why does Altera DE2-115 board GPIO expansion header contain 5V & 3.3V power but the IO standard has no 5V?

The altera DE2-115 board user manual section 4.8 page 47 describes the GPIO expansion header. It is clear that it has 3.3V and 5V power supply. However, it later says that "The voltage level of the I/...
2
votes
3answers
412 views

What do you use a board like this for?

I'll start by saying that I'm a software guy, I know literally nothing about electronics. I recently bought a raspberry pi, and while browsing at my local electronics shop, saw this board for $5. I ...
2
votes
1answer
222 views

PCB Layout Issue

My PCB has drill holes in it as it needs to be screwed onto a case. Since some of the components too close to the screws were shorting, I moved components around to solve the problem. This resulted ...
2
votes
2answers
237 views

Can motherboard heatsink screws change the inductance of nearby traces?

I have bought motherboard and heat sink. The heat sink uses metal screws and the screw heads are isolated from the board with thin mica insulators. But the screws end up being above some traces on the ...
2
votes
2answers
131 views

Copper layer delaminates on Printed Circuit Board

I have been making the PCB boards by the conventional process since last few years (pressing, etching, drilling, soldering). I usually iron the photo paper to the PCB board for around 15-20 minutes ...
2
votes
1answer
194 views

Can anyone tell me if there are any logic gates built into this circuit board?

We have these circuit boards that we use at work for indication of whether a door is open or closed... To be honest, I have no idea how they work. I drew up a diagram of it to see if anyone can ...
2
votes
3answers
2k views

Impedance matching routes in Eagle board

I am making my second board using Eagle CAD. I have different components with a set of different sizes. I set the minimum width for lines to be x. That way, the autorouter creates EVERY line in that ...
2
votes
1answer
401 views

Build PIC development board on bread board

I have PIC24FJ128GA202 IC only. Since development boards cost too much, I would like to build a development board on a bread board and try some sample programs on it. Like the image below: Is it ...
2
votes
1answer
142 views

anyone knows miniature wireless system with data rate >= 2000 Hz?

I am currently using TS7250 board from "embeddedarm" for my sensor and having it set up at 30 KHz for data rate. However, the board is too big for my current application. Can anyone recommend another ...
2
votes
1answer
72 views

What is the role of the four-pin header on this USB relay board?

This is a commonly available relay board with a USB HID-like interface. I haven't been able to find a datasheet for it on the sites that sell it. On its right side there's a four pin header. I'm ...
2
votes
1answer
2k views

Can I use a 22 microfarad capacitor in place of a 10 microfarad capacitor?

I have a bad 10 microfarad capacitor 400V but can not get a replacement. Can I use 22 microfarads 400V instead?
2
votes
2answers
639 views

Error sending data to LED Display board from a microcontroller

I have a LED Display which has a RS232 connector so that we can connect it to our system. Display board accept whatever data we type in hyper terminal and display it. For e.g if I type ...
2
votes
2answers
741 views

Minimal requirements for a dedicated VNC client

On many occasions I've considered doing a small hobby project to design a minimal dedicated VNC client, in essence with a goal of a $2 cloud-based computer! (ok $2 is chosen completely arbitrarily). ...
2
votes
2answers
156 views

Is a loginway PIC-01 development board enough to program a PIC?

I have a loginway PIC-01 Development board (it was sat in a cupboard for years). Does this board require additional adaptor hardware to blow a PIC (ICSP stuff etc), or can the on board serial port be ...
2
votes
1answer
299 views

Cases for Phidgets boards [closed]

Are there cases for Phidgets IO boards such as the 1019 ?
2
votes
1answer
239 views

Low cost connector for two stacked PCBs

I know we should not ask for product advice here, but I searched a lot for a specific board connection solution lately and it almost drives me crazy that I have only found so little options. I need ...
2
votes
1answer
233 views

Completing circuits with transistors and arduino

Hello and thanks to anyone who helps. I am trying to create a test bench for a control board we commonly work on at our business. One control board has 11 pins that a ribbon cable would be connected ...
2
votes
1answer
772 views

Troubleshooting ready board with LM339 IC?

I thought, I will not bother any more with this project of mine, but I really run out of ideas trying to get it to work. When using breadboard, the design works as expected (did it couple of times ...
2
votes
1answer
91 views

Searching for standalone unix development board to connect DC motors

I though a bit about the board and came to the conclusion that it may be more intelligent to use a stand-alone component which provides serial ports and an unix os which I then can control over the ...
2
votes
1answer
1k views

Development with InvenSense MPU-6000/6050 - where to begin?

I'd like to use a MPU-6000 chip for an AR app on an Android device. However I have no clue where to begin, which parts I need or whatsoever. I'm familiar a bit with Arduino, but only as a newbie. ...
2
votes
0answers
46 views

What programmable board should I use for my project? [closed]

I have a small project going on, you can call this a research project that I needed to pass a certain class。 But the thing is, I don't know what I should use Arduino? Raspberry Pi? Im a complete ...
1
vote
2answers
318 views

What is this little board I've found in an ATX PSU?

I have dissembled and old ATX power supply, and I've found this small board between the male AC input socket and the main board. What is it?