Search Engine

Coil Pcb

Add Question

53 Threads found on Coil Pcb
We wish to use the EPCOS ETD291610 horizontal coil former for our Flyback SMPS transformer. It is seen on page 4 of the following? This former has a height of 25mm above the pcb. This is too high for us?..we can accept no more than 22mm. However, the former has some ?fingers? whi
Hi, I'm going to put together a rough 1/4 wave vertical monopole with poor ground plane in the form of a pcb trace (pcb will be mounted perpendicular to the earth). I know I'll be giving up a lot of efficiency but it's the old story of space and manufacturing cost trade-off. So I'm thinking that current is going to be strongest towards the fo
Besure to have adequate exposed copper for acceptable, Rca. and the coil ambient is not room temp but that heatsink rise plus ambient. The datasheet is not at fault and appears to be well designed to achieve this with a large 2520 conductive internal case footprint to the small pads. Keep in mind the Rca with 1 sq in of double sided copper with
If pcb design of switching power supplies is your interest here, then this document , on pcb layout of SMPS, will be of use.. - - - Updated - - - Ringing in gate drives sounds like insufficient damping in the gate drive loop, or the loops involving the gate drive not being narrow-area enough so having st
I am having a modeling problem in HFSS and would like to know if anyone with more CAD or modeling experience has any input. In the past, I have been able to successfully been able to simulate flat, printed coils on flexible substrates. These look similar to these pcb spiral coils, but printed on a flexible plastic. 126248[/ATTA
Hi everyone, I designed a coil of traces (meant to simulate wire) to span between top and bottom layer of pcb in CST MW studio. It looks perfect in CST and now I would like to export it to Gerber for fabrication. I align my 'local WCS' to the top layer and exported it (repeated for bottom layer) Unfortunately both layers do not include the Vi
use standard common emitter driver with base resistor and freewheeling diode. I usually put a ceramc capacitor close to the relay coil in order to provide some additional spike suppression.
Hi, i have chosen SSR based MOSFET PLA140 (pcb mount) for AC and DC digital output application. Pls suggest output filter for DC load and AC load load rate AC = 240VAC 100mA inductive load (AC coil Relay) DC = 12 to 110VDc inductive load (DC coil Relay) Application: Energy meter - Depends on the KVA output card will contro
schematic needed to comment. you need to use a differential amplifier to null out the coil noise...not sure if it is magnetic pickup or ground loop problems.
I have used it for simulation of RFID coupler coils and pcb trace self and mutual inductance as well as skin effect losses. Yes, you need some time to become familiar with the description language. You can also visualize your geometry file with the FastModel tool.
Hello, i am doing this mini solid state tesla coil : pcb: think i sol
I constructed micro-strip pcb inductor (coil ) in ADS 2009 for a particular application, The setup is a 2 layered system which houses the coil on 1 side and layout for a few IC's on the bottom side. PFA the setup image. 104287 Now the issue arises when i export the layout in the form of a gerber, is that all t
Make sure you have a coil (filter) on the DC bias sources. These hidden signals could perturb you device.
What parts did you use. What coil and with what current rating you use? You didnt show values of resistors in circuit. Probably you have problems in circuit parts values. Post photo of your pcb with parts, and complete circuit with parts values what you have.
You can check the speaker coil resistance, if they are almost equal and have a small value then something is wrong with the amplifier. Check also for any obvious damage to the pcb.
how is that inductor constructed? if you had used two sections of a core, the core or loosemenss of coil might cause the audible 'whine'. ensure that the coil core fixed with some sealant. and the coil itself is tight and packed .
i am trying to simulate a core-less pcb transformer with maxwell 14 3d . my problem is that i have assigned coil terminals to 2 faces of a copper spiral but when i validate the design i get this error for my terminal: Project3 (C:/Users/mine/Documents/Ansoft/) Maxwell3DDesign1 (Transient) Illegal external terminal 'Coi
yes. I have put protecting diods to supress back emf of coils.
RFID coil is effectively a pure AC magnetic problem that don't need a full featured EM solver. Nevertheless should it give correct results. I read about a cellsize setting of 20 cells/wavelength, which refers to a cell size of about 1.1 m. Don't know if this is a problem.
I am from a Printed Circuit Board shop, recently, we have a lot of order with integrated inductance design on board. The coil trace is etched on both outer layer and inner layer. I am looking for a effective tester to perform online inductance test. Can anyone introduce: - The manufacturer of pcb inductance tester? - How to calculate the ind
I reviewed the available SM130 documents and think, they are missing important informations about the designed antenna matching. ISO14443/Mifare will be using a tuned multiple turn pcb coil, but the details depend on the reader characteristic, that isn't given. Can you tell the chip manufacturer/type of the reader IC? I expect, that you'll be able
At 40GHz, you coil will probably be a single turn or similar.. So, you don't need to connect inner end..
...The freewheel diode is across the coil, no additional diodes are needed. The circuit is acting as a buck converter with the coil inductance as storage inductor. Maybe the wide distance between solenoid and switching circuitry at pcb may disseminate a large amount of ESR noise to enviroment around. Special care must
Hi, I am controlling 6A coil contactor, using a 12V relay by the micro controller. Circuit is working fine even there are noises, but when i connect the ground of CRO to the Circuit ground, when the contactor is energized, the controller resets. Is there any solution for this..
Notice that the ferrit body is conductive so the voltage applied between the coil of the inductor and the track under the inductor will be applied on the insulation of the inductor wire and the solder mask. The solder mask thickness can vary but it's usually thinner on narrow tracks (due to cappiliar effects). The wire insulation is also quite thin
It's not particularly a coil, rather than a short straight pcb trace. You'll have higher parasitic inductances a many places in your circuit. Unless you're targetting to a mutiple GHz microwave circuit, the note sounds rather ignorant. Strictly spoken, the inductance of a pcb trace can't be calculated without knowing the substrate height an
You shouldn't need the 1N4007 - the ULQ2003AD has built in diodes - just connect pin 9 to +28V. The relay you linked to is 6V, not 28V. Are you sure you have linked to the correct one? If so, you cannot use 28V for the relay coil. Keith.
Hi Tpmj, I believe; you must differenciate between coil & inductance... A TX (& RX too) must have some selections circuits, even if you dont like it, and you must apply some SAW/XTAL or L-C elements for that. Other question is; how do you realize your L-C circuit: as a coil + w. extra/parasitic capacitances or as a pcb/printed (...)
Hi, where do I buy pcb wil coil, 100 microns Cu winding width, 35 microns winding height, 200 microns winding pitch, and a number of windings between 4 to 10? Thank you.
hello everyone, anyone know what's important we need to calculate single layer air coil inductance and how to calculate air coil inductance? Thanks, kyg
Hi, wich software to calculate UHF and VHF pcb coil? (spiral, round, linear ect) Best regards Leemarrow
Here is an FM transmitter circuit that does not use any coils. It uses a 10.7MHz crystal filter in an oscillator and is amplified by Cmos logic inverters so its output is many harmonics of 10.7MHz including its 9th harmonic at 96.3MHz in the middle of the FM broadcast band. If the FM receiver is extremely sensitive then the range might be as fa
Can anyone explain or point me towards any papers that have been published to describe coil behaviour beyond the self resonance of a spiral pcb coil. I have created two different length pcb coils, both with similar inductance and self resonant frequecies but viewing the impedance of the (...)
hello everyone! is here any alternate method to sense ac current without using coil thanks
i have built a pcb with an atmel tiny2313 which drives a few relays. the mcu drives the relays through the 2N3904 transistor. parallel with the relay's coil a 1N4148 diode and a 1k resistor with a led are connected. the power supply of my circuit is 24V. The problem is that, without the mcu on board the leds of each relay are always on. what is goi
I am working on project named RFID using EM4095 as part of receiver module. As transpoder I use EM4102. I designed coil L = 400 uH. I designed pcb with all pheripheral components (capacitors,resistors as shown in datasheet). I started to measure the RFID system.The problem is: on demod_out rectangle signal .If I haven't attached transponder the
do want the coils embedded on a pcb?
A rough rule of thumb is 1nH per millimeter of straight track so 6.2nH is a very small inductor paticularly if you need some bends in it. Printed coils have high flux leakage and are affected by close metal objects such as other components or a metal box. You may need to fabricate several iterations of the pcb design or do a full electromagneti
One option is to implement the Wheeler expression .. see .. Then, using normal tracks design/draw this coil .. Regards, IanP
Hi I have a high frequency coil that has no RLC model but instead has just its 2 port S parameters. I want to include this coil in a pcb that i am modelling in HFSS, but there is no way to assign S parameters to a particular device and model the whole thing. I tried to do it in designer and then export to hfss but to no avail. The only (...)
Yes it is possible to make antenna on pcb. For help see posts about patch antenna. For coils see posts about microstrip inductors.
Can I make an on pcb antenna? coil? how? And can the antenna be horizontal as the pcb is, though it be omni-directive? Please help out, Thanks alot, Ahmad,
"coils on pcb": Regards, IanP
dowload the following
hi all 1- how can i calc. the inductance of etched inductor on pcb ???? 2- does any one have a circuit for 30 MHz (sine wave) oscillator without coil?? thx all
what are the advantages and disadvantages of these types of antennas. for a short range only between 1-10 meters. thanks in advance.
Hi, Inductor its a device that have a coil (conducting the current) and a "magnetizable" core; depending on the material of the core you can achive diferents magnetic permeability's producing diferents inductances. Ferrite its one of the manys diferent cores..... HH NeuralC
Yes, an air-coil wire antenna is better than a pcb antenna assuming that you are using an usual FR4 material. This due to higher loss. You can try to use a wire length of lambda/8. Theoretically the circularly coil give the best radiated resistance. You can flattened the coil and measure what gain you get, before and (...)
Hi, In fact the coil is part of the pcb. Here is the pcb layout