Questions tagged [flexible]
See also [fpc] for Flexible Printed Circuits.
54 questions
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Transparent Flexible display with good definition
I'm looking for any technology (not a specific model, which would be against the SO rules) which would allow a display with the following properties:
transparent (would be used on some kind of ...
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What kind of via, or pad is this?
All I can tell that it carries some of the paths from the top layer to the bottom layer for the edge connector. How do I reproduce this?
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84
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Handling flexible PCB coverlay openings in fine-pitch footprints
I'm trying to understand how to handle fine-pitch pads on flexible PCBs. For example, a LIS2DH12 accelerometer uses an LGA-12 (2mmx2mm) footprint with 0.25mm wide pads on a 0.5mm grid.
I'm doing a ...
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Does the minimum value of the S11 (return loss curve) at the resonance frequency depend on the resistance of the antenna?
I was trying to fabricate a flexible NFC antenna. Initially, I fabricated my design on a copper PCB. It worked perfectly fine with my NFC chip and facilitated NFC communication. I observed its S11 ...
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Flexible solar cell powered LED
I want to make flexible solar cell-powered LED. The flexible solar cell that I want to use is ONP1.2-12X24 and I just want to use chip LED.
When I connect only one ONP1.2-12X24, it shows near 1.2V. ...
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How to specify the stiffener for ordering Flex-PCBs at JLCPCB
I have a Flex-PCB design that contains several areas that are supported by stiffeners. I am trying to order the PCB at JLCPCB but can not figure out how to specify the areas where the stiffener is ...
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297
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How can I calculate the resistance of a complex PCB trace?
I want to design a flex PCB heater. In the design requirement, there is a value such as 7.5 ohms and 18 watts. When I calculate with copper, my PCB area is not sufficient for the desired resistance ...
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What are the strongest wire connection points on flexible PCB
Wires have to be soldered onto the bottom pads, however these pads are really fragile and often get loose from the flexible PCB. Now I'm trying to create these PCBS myself but with different ...
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Create footprints on flexible PCB
I'm completely new to PCB design but I'm trying to create my own flexible PCB. Now I want to recreate the board below but with different contact pads on the bottom (because they are really fragile). ...
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Possibility of mixed PCB that flex part covers rigid part after coming out of board cutout
I want to design a board with mixed rigid-flex approach, the flex part is carrying some traces from different rigid layers, comes out as a mid layer from a cutout of rigid board but it should covers ...
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Most probable cause for unwanted capacitance on serial line?
I'm a PCB rookie and just got the first sample of a 4 layer flex-rigid board that I made.
I'm using 3.3V TTL-UART @ 115200 baud, the stackup is as follows:
CU 35 (signal)
Prepreg 0.7mm
CU 35µm (GND)
...
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What is a 7 or more pin flexible connector that fits in a 12.5 mm gap?
I am making a very compact embedded clamshell device. it has two boards, connected by one hinge.
I only have a 12.5 mm gap where I can put a connector, and I can't really trim the number of lines down ...
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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.
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Is there any way to get 2 sided FPC with stiffener?
We need to design an FPC board that consists of components like mezzanine connectors that are centered on 2 sides, top and bottom layers. We have concerns about attaching the FPC board to the main PCB ...
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Techniques how to join two wearable-flexible pcb parts
I am looking at pictures/videos that show people wear fully flexible PCBs, and I wonder how they join their ends together. They never show the part where the flexible parts are joined together, so I ...
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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:
...
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Need help to identify this PCB connector
I really need to identify the name of this connector type.
It is the PCB end of a lightning connector on a FLIR thermal camera for IOS.
Mine is just like this but with lightning instead of this USB-C
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Is it possible to mount a 7-Segment on an FPC and what points need to be considered?
I am designing a project with a flat flex PCB, in which I would need a 7-Segment display similar to below picture.
I would like to avoid to add an extra PCB with a connector or hot-bar just for the ...
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363
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Flexible, flat - and adhesive - connectors for PCB pin pads?
Apologies in advance that the question is a bit of "does this exist" - but I really cannot remember whether I've actually seen a prototype for something like this; or I've seen an ad for an ...
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How do I connect wires to this micro stepper motor?
I want to use these motors for a small tactile display but I'm not sure how to connect to the motor connections they're so small.
I was thinking about potentially using a semi-rigid PCB. If so is this ...
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537
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Thin FR4 versus Polyimide Flex
I'm looking at prototyping a PCB that needs to make many connections over a curved surface. To develop this, I'm looking at using thin/flexible PCBs. For a 2-layer design, I'm comparing a thin (0.2mm-...
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Flexible heater
Im design flexible heater for camera lens holder with thick trace (5 mil),
According bto Ohm law, the trace resistance is 7 ohm, with 2.5V the total power is 1W.
Do you think is good heater design?
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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 ...
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101
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Using Flat-Flex for CAN connection
I am currently developing a robot with multiple modules that have to be connected using CAN (at 5V or 3.3V). The robot has 2 strong DC motors (with spikes over 100A) and also operates close to ...
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438
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What kind of connection to use between two circuit boards that move with respect to each other?
I need to connect two circuit boards - one with a microcontroller, power circuitry, display, etc to another with several sensors on. The connection will require somewhere between 4-10 lines - 5V power,...
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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 ...
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Identify that connector - Is it reusable?
I have an Asus Zenfone AR which has had the screen replaced 3 times. Last time I replaced it myself, Asus the first 2 times.
Screen replacement went fine but once together I discovered up volume ...
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Crimp and Solder connectors for flexible electronic
I am desperately looking for crimped connectors compatible with flexible PCB and devices such as the one depicted in the following figure :
This is a pressure sensor based on a piezoelectric polymer. ...
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LVDS Flex Cables - Optimizing Trace Layout for 10 GbE
I want to run a 10 Gigabit Ethernet (GbE) signal over a 15 pin LVDS flex cable like this one:
My PCB will accept an RJ45 connector, and those traces will run over the PCB to the flex jumper, then ...
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I need to do a membrane pcb for a keyboard or a flexible PCB like a membrane PCB
I need to design a membrane PCB for a keyboard and/or flexible double sided PCB that works like a membrane PCB. My problem here is that I don't know how to do the buttons, with one contact of the ...
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Bending insensitive connection or highly flexible/thin cable
I want to attach several accelerometer data loggers to different parts of the human body (i.e. my own, it's not gonna be a commercial product). The individual units save their data to sd card so they ...
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Which material is used in flex PCB circuits ?
We are planning to use flexible PCB circuit in our application. Can anyone please suggest the material used in flexible PCBs ? We are looking for the flex PCB material similar to the one used in ...
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SPI max distance on flexible circuit
I want to run a number of sensors up the length of a flex circuit, they all communicate via SPI and I will run chip selects individually to each device.
I need the flex circuit width to be minimal so ...
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Unifilar (non-stranded) copper wires flexibilty
we all know the 26 AWG wires that come inside UTP cables. Those surely are flexible. But what a bout an AWG 15-16 such copper wire, is it flexible enough to use as feeding cable for the 12 V car ...
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752
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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 ...
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Will a 0.400mm thick PCB be too flexible?
My PCB will roughly have the following stackup:
35um copper foil (tracks)
100um FR4 prepreg
200um FR4 core
100um FR4 prepreg
35um copper foil (tracks)
This gives a total board thickness of around ....
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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 ...
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Flat flex cable soldered to PCB is developing a short circuit over time
I'm facing the issue that an OLED display develops a short over time and stops working. The short always occurs at the solder point where the flat flex cable gets soldered to the PCB.
Touching the ...
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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 ...
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how to remove dialshock 2 ribbon flex board?
my dualshock 2 has a connector to the ribbon board and looks like this
connector
can someone tell me the proper way to remove the flex board from this connector while leaving the connector in working ...
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How to manufacture cheap custom flexible circuit boards? (strips)
Let's suppose I need two long series of IR emitters and receivers to detect position of people along a hallway (corridor). I would use surface mount components to make the sensors less noticeable, and ...
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Flexing Peltier Plate (Physical Question)
I am doing research into Peltier plates for a project, which requires a flexible component. From what I have found, no commercially made flexing Peltier plates seem to exist. My question is, what is ...
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How could I power flexible oled screens with wearable power source and could I transmit data onto it with bluetooth via app [closed]
How could I power flexible oled screens with solar power and could I transmit data onto it with bluetooth via app?
Would this be possible? please can you help thank you
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Flexible long wire for high currents
I have an ATX power supply which has got multiple 5v outputs (at a maximum 40 amp current). I am willing to use it to power up a moving mechanical system 5-10 meters away. The problem is that since ...
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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...
...
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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: http://...
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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
...
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How do I interface to this flexible flat cable connector?
I've noticed this connector on a lot of boards, and I was wondering if anyone knew where to source them? I can't seem to find them on digikey.com anywhere. What I'd really like is to get a male ...
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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 ...
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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 ...
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