Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [flexible]

See also [fpc] for Flexible Printed Circuits.

45 questions
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Is there a technical reason why most touch screens use glass rather than plastic?

Most modern touch screens in portable devices are made of glass. This glass often breaks if accidentally dropped. Also, it is very reflective, making it difficult to use in strong light. I know that touch screens without glass exist. For example,…
Fiksdal
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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... ...and consists of alternating rows of…
Rev
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Flexible-PCBs: what data is needed for manufacturers?

Can someone explain more about how you generate data for flexible or flexi-rigid PCBs for manufacture? Do I just make more layers and export more gerber files? Is there anything I need to keep in mind when sending these to be manufactured? I've made…
kerblogglobel
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Solder Mask on fPCB starting to degrade

I have a flex-PCB that is acting as a sensor bus for one of my projects. I started getting some wonky readings from one of the sensors, but I found that if I removed the sensor from the bus (with minimal heat) the sensor was working fine. Before…
thron of three
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Flexible Watch Circuit Parts

I'm working on a project to make a wristwatch similar to this one: Now I have the ability to make flexible PCBs since I accidentally bought some crazy thin copper clad. I obviously want to use SMD LEDs since they're pretty small. What type of \$\mu…
NickHalden
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What are standard design rules for a Flex Printed Circuit (FPC)?

For an FPC made out of Kapton (polyimide), what are the: min trace width min trace-trace separation min distance from a trace to the edge of the FPC min drill hole diameter min distance from a drill hole to the edge of the FPC min distance from a…
AlcubierreDrive
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Defining a flex bus in Eagle

How does one go about creating a board file for a board with both "normal" PCB material, and flex materal? I have a project where I want the PCB and a flex bus to be seamlessly joined, like:…
Purrell
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Is it ok to bend a VIA in a Flex Printed Circuit?

On a Flex Printed Circuit (FPC) made out of Kapton polyimide, will anything bad happen if I put a VIA in a part of the FPC that has to bend? VIA size: 0.2 mm hole diameter in 0.4 mm copper diameter FPC bend radius: 0.7 mm Kapton thickness: 0.2…
AlcubierreDrive
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Identify the connectors on those sensors

I'd like to know what is the name of the connectors in those devices. I'm trying to create a sensor for myself, and I think they are very practical when trying to add cables or clincher connectors. The pins are 0.1" apart
Michael Efraimidis
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Join together two flexible electrical cables

I have 2 electrical cables (audio cables) of same diameter that I want to join, with a connection as discreet as possible. It is common to use some dominos for this kind of task, but these are really to visible. In a perfect world, I'd like the…
Oliver
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How to choose the right flexible cable for moving parts?

Is there a generally accepted guide to select a cable, which has to withstand certain bending stress? I am looking for something like this: IEC 12345-6 Wire rigidity How many bending cycles between straight wire and a bow with R = 10 x diameter can…
Jonas Stein
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Fixing the pins in a flex cable

This is a flex cable from a kindle that connects the motherboard to the lcd. The pins at the edge are broken and not making any contact with the connector. Is there any salvation for this? If there's no solution will a universal flex cable work as…
WannabeeDIY
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How much can you bend a flex PCB?

Having never worked with flexible PCB's before I was wondering how much and how often it can be bend? I'm thinking of using a flex PCB inside a pet collar where it would have to fold in order to adjust collar length. Would a flex PCB be able to cope…
Jason Schot
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How to connect flexible flat cable

I'm trying to connect this to this. From another question I asked (I can't find it anymore) the cable is a flexible flat cable, and I should pull out the black plastic piece at the bottom right of the picture in the first link, insert the cable,…
RK.
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Can I slice a flex cable to reduce its width?

I have a cable for my raspberry Pi camera that is bulky in its current wide state. While tricky, is there any downside to slicing it length wise, and stacking the pieces on top of each other? Would there be too much interference? I also have a…
beeudoublez
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