Questions tagged [connector]

Mechanical part providing electrical contacts for a cable or electronic circuit board.

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53
votes
12answers
67k views

How to connect USB Connector shield?

How should I route USB Connector shield on PCB? Should it be connected to GND plane right where USB is placed, or should the shield be isolated from GND, or should it be connected to ground through ...
13
votes
1answer
2k views

What is this type of flexible contact strip called?

The LCD below is from a cheap digital clock which was (obviously) damaged (broken glass). The electrical connection between the PCB and the display was realized with this pink strip. Its flexible... ...
207
votes
7answers
188k views

Why was Mini USB deprecated in favor of Micro USB?

Mini USB connectors were standardized as part of USB 2.0 in 2000. In 2007, the USB Implemeters Forum standardized Micro USB connectors, deprecating Mini USB connectors four months later. Why? What ...
29
votes
1answer
23k views

What to do with third contact in DC barrel plug with only two input contacts

My AC-DC adapter gives output of 12V and GND. I tried to search for suitable DC barrel plugs and found that most of them have three terminals So, pin 1 is positive in my case. 1. Which pin should I ...
13
votes
4answers
10k views

Best edge connector for my pcb?

I am making a PCB where the goal is to keep BOM as low as possible and also the cost to the lowers. It has proven to be quite a difficult task but I am at a final stage now. My PCB needs to be ...
12
votes
4answers
148k views

How to tell polarity expected of a DC barrel jack?

I'm sure this information is somewhere around the internet, but I can't find it. I have a device that takes a DC barrel jack. I don't know the polarity it expects though. There is a marking though. ...
14
votes
4answers
22k views

Deciphering a DC jack schematic

I am trying to include a DC jack on one of my PCBs. I am just setting up the footprints now, and I am not quite sure which pin is which. What do the symbols on the drawing mean? I have included a ...
7
votes
2answers
12k views

Creating a high-current bus on a PCB

I'm planning a custom power-distribution / fuse-board for in-car application, but that requires carrying high currents (50A+ @12v*) on a PCB trace. Since I'd like to keep the board cost, and physical ...
3
votes
2answers
2k views

Mechanical connectors for flexible PCBs?

Does anyone have a good solution for a mechanical connector for flexible printed PCB, like those used for strips of common-cathode RGB LEDs? (You can cut the strip across any of the solder pads and ...
5
votes
1answer
2k views

Castellation metal loop connector

Here's a module with castellated pads attached to an eval board: Module's castellated pads in eval board connector http://g04.s.alicdn.com/kf/HTB1gSjWHpXXXXcpXFXXq6xXFXXXj/wifi-module-Atheros-...
27
votes
2answers
11k views

Connectorless USB on a PCB

I would like to make a board which can be plugged directly into the USB port of a computer, instead of using a separate male "USB-A" connector. I have seen this system used for very small USB memory ...
21
votes
8answers
7k views

Suggestions for small and handy connector for in-circuit programming?

I have many PCBs that use an AVR in SMD packaging, and since I frequently change the firmware in prototype boards, I'm trying to come with the best solution to program the AVR quickly and easily. The ...
15
votes
1answer
5k views

Mysterious LCD interface without wires [duplicate]

I was ripping off a Center 352 Infrared Thermometer. The basic functionality is to sense the temperature and display it on an LCD. The LCD turned out to have no interface to the controller. The PCB ...
7
votes
2answers
2k views

What connector is similar to U.FL but has no pin?

I am trying to identify this connector style: Look at the two RF micro-coax connectors on the left, just next to the PCB antennas. They look identical to U.FL or IPEX but have no central pin. What ...
8
votes
3answers
3k views

Is a screw or push-in terminal better for vibrating environment?

I need to decide what connector to use on my PCB to connect low power wires. Among the available options on Farnell/Mouser etc. The price and size are almost similar. I wonder if using a screw ...
5
votes
3answers
2k views

Through board connector

I'm looking for a connector. Ideally it would be a one pin connector mounted on the back side of a board and the pin would come through the board into connector. Here's an illustration: Does such a ...
3
votes
3answers
956 views

Need connector suggestions

I have an outdoor electronics project which is running 5V DC through 12 AWG wire to power strands of LEDs through 24 AWG wires. The strands are powered in parallel like so: ...
66
votes
11answers
322k views

How can I tell the size of a barrel power connector?

Spring cleaning, and I'm trying to get power supplies for all my devices with missing power supplies. They're all the typical barrel power connector, and I'm having a dickens of a time trying to ...
14
votes
4answers
7k views

How to find socket for keyboard connector?

I am looking for a socket which is able to receive the connector of the ThinkPad X41's keyboard. How do I identify the socket so that I can find it on the (German) market? Background: I want to build ...
20
votes
2answers
15k views

Castellated/Edge-plated PCBs: Comments on Mechanical/Electrical contact reliability

(This is a follow-up to this related question). I'm interested in some feedback from people's design results/experiences with Castellated PCBs as a method of attaching one PCB to another. By ...
16
votes
5answers
11k views

Ideas for attaching / connecting / stacking one PCB onto another with no gap

What methods might be feasible for attaching/stacking one PCB immediately on top of another PCB, with the following conditions: Zero spacing/gap between the two PCBs Electrical contacts are needed, ...
15
votes
3answers
14k views

What is the name of this connector from a fan?

I am EE hobbyist and I often used recycled parts in my projects. I came across this connector to a Heat Sink Fan and would like to know the name of it. Thanks for the help.
11
votes
2answers
6k views

Soldering a high-power cable to a PCB

I want to make a power connection between my PCB and an accumulator. I need it to handle up to 100A, and to be mechanically very strong, because it will be on board of a buggy car model. In the ...
10
votes
4answers
13k views

What is the best way to solder these wires to circuit board?

What is the best way to solder these stranded wires onto a vero board (strip board)? I am thinking maybe using some kind of connector instead of just soldering on. It will make things more flexible. ...
9
votes
5answers
5k views

Connector Problem. How to conveniently connect with cell-phone LiPo batteries

Using a LiPo battery from sparkfun is easy as it comes with a molex connector on it. But how to conveniently connect to a LiPo battery taken from a cellphone? Soldering doesn't work on the exposed ...
4
votes
2answers
2k views

Crimping Connector Issues

I am attempting to make some of my own connectors to attach to a PCB I have made. This was the tool I used to perform the crimps: Source My primary issue is that the connector will not fit into the ...
8
votes
3answers
7k views

Current and Voltage Ratings for Multi-Conductor Connectors

I am currently looking at some multi-conductor connectors that will handle reasonably high currents (approximately 30 A at 24 v). When reading datasheets, I see that the connectors have both a maximum ...
4
votes
1answer
1k views

Potentiometer with four pins?

Normally potentiometers have three pins, but the Song Huei's SL-20V has four. According to the datasheet: 1, 2, 2', and 3 What is the fourth pin for? Update Disassembly shows that @jippie's ...
7
votes
1answer
1k views

What is a good way to in-circuit update the program on a SyncMOS 5964?

I want something that can re-program a PQFP SyncMOS SM5964 chip already soldered to the target circuit board. I picture a ribbon cable that I plug between some sort of 2x8 or so header connector ...
3
votes
1answer
462 views

What do you call the connector type which is soldered on PCB and it holds cables by pressing on them by screws?

Here is a picture of two of them: I searched for these connectors in Digikey and Farnell for an hour, but couldn't find anything similar. Can you please name these connectors for me and/or give a ...
2
votes
1answer
787 views

Dimensional Tolerance for US Standard NEMA 1-15 Plugs

I am trying to find the dimensional tolerance on US electrical plugs. I have tried looking online, but I have only been able to find that they are called NEMA 1-15, and have found the picture below ...
1
vote
2answers
842 views

What is this connector called?

I need to repair some kit that uses several connectors like the one pictured below. The existing connections have become brittle and are breaking off. The wires appear to be crimped into the ...
1
vote
1answer
3k views

Slide lock or flip lock for FPC connector?

I'm looking at different connectors for for an FPC cable, and I've narrowed it down to two nearly identical connectors, whose only difference in the lock. One uses a "slide lock": While the other ...
1
vote
2answers
233 views

What would happen if I choose a connector with current rating smaller than the actual current?

I need a butt splice connector that can handle up to 150A, which is really hard to find. What would happen if I connect it to a 12-10AWG butt splice connector? Other type of connectors are not ...
0
votes
2answers
190 views

What type of connector is this

I've bought a 12VDC pump for a CNC machine I'm building. I want to get a connector that will fit this plug so that I can run it from my power supply source. The problem is that I don't know what ...
0
votes
1answer
133 views

USB3.0 Internal Header Connectors

I've been searching for a set of headers and connectors as defined in the USB 3.0 Internal Connector and Cable Specification document for a casemod project. Unfortunately, after scouring Digi-Key and ...
19
votes
9answers
26k views

How can I make connection on pcb (circuit board) holes without solder (for prototyping)?

I have a Pro Micro board (very small -- see pic below) and it has connector holes in the printed circuit board. Best Non-Solder Connection (Easy and Removable) I'm wondering the best way to make ...
6
votes
5answers
5k views

USB micro B receptacle has 6 mounting tabs. How many do I actually need to ground?

This USB micro B has 6 mounting tabs. If I ground none or only 1 of them, will it ruin the signal? There is a pad for the signal ground that is separate from the mounting tabs. Fyi USB 2.0 has a max ...
16
votes
1answer
2k views

Reasoning behind Ethernet pair order

An Ethernet connector seems to use a surprising choice of signal placement in its RJ45 connector. Does anyone know the reasoning behind: The decision to make pair 2 straddle pair 1? Why Ethernet uses ...
15
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 ...
28
votes
2answers
3k views

Why are the contacts for the Data lines in USB A and B plugs shorter than the contacts for Ground and Power?

I was reading up on USB connectors on Wikipedia and I've noticed that the contacts for the data lines (D+ and D-) are shorter in both the Type A and Type B plug. What could be the reasoning behind ...
8
votes
3answers
8k views

Vertical USB connector, what is the best practice?

I have a board that is vertical to the ground, I need to provide a USB interface to the external world, due to the orientation, this needs to be vertical to the board. (i.e. think of my board standing ...
5
votes
1answer
351 views

What's the name of this nice spring contact?

Ah, it is really a beauty isn't it (see picture below)? Around the package you see some spring contacts, really, really nice. I have some ESP8266MOD modules and like to use these spring contacts ...
9
votes
2answers
906 views

Why do most USB OTG dual-role devices use micro-B connector instead of micro-AB

I mean, this is against the rules! Most USB OTG devices claiming to be host capable (most Android smartphones and tablets) have a simple micro-B connector. Shouldn't they have a micro-AB connectors? ...
7
votes
1answer
2k views

Proprietary Kinect connector [closed]

I'm looking for a source for the mating part to the proprietary USB connector on the Kinect, which includes standard USB signalling and power, and also the special 12V supply rail. The cable version ...
7
votes
6answers
26k views

How can I create a female jumper wire connector

How can I create the female side of wires like these to fit 2.54mm spaced headers? What would the part inside the enclosure be and what is the name of the enclosure? I'm struggling to find them on UK ...
6
votes
4answers
16k views

Connecting a DC barrel jack to a PCB board

I am wondering how I can include a DC jack such as below in my PCB circuit: There are no such PCB packages in my library, so the first step, I presume, is to make a prototype with the exact ...
24
votes
8answers
11k views

Why do USB connectors only fit one way?

Why do USB plugs only fit one way into USB ports? Forgive my ignorance, but there are several types of plugs that are "omnidirectional" and do not have to be oriented a certain way to fit into the ...
17
votes
9answers
15k views

Ideas to stack multiple PCBs on top of each other?

My design has a number of boards stacked on top of each other. I would like to connect signals across the boards. The boards all need the same 10 signals running through them (all boards from top to ...
13
votes
2answers
1k views

Are these pin connectors a standard part? If so, what are they called?

This is a "wet" temperature sensor for a Boilermate 2000 thermal store. The pin connectors are inserted into a plastic plug that connects to the control board (see 2nd image). The pins do not stick ...