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How can P*otel? protel :) I advice u u read a bit this document. With protel only, it might be hard... :) And I heard that this "method" need several prototypes and component implementaton can cause difference as well. Like I've seen something on the inet : I
Hi guys, I wanna FM transmitter diagram with only strip coils (I hate ordinary coils). Can anybody help me? Can anybody give me a url for a freeware which designs a coil as a strip in a pcb? If you need some help let me know may be I can help you. Thanks a lot everybody.
dowload the following
One option is to implement the Wheeler expression .. see .. Then, using normal tracks design/draw this coil .. Regards, IanP
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
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 (...)
Hi, wich software to calculate UHF and VHF pcb coil? (spiral, round, linear ect) Best regards Leemarrow
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.
Hi, i am making a board with a video chip and in the recomended circuit there is a coil components that is suppose to between 0.1 to 0.4n. this component has a note that says: * Formed by the printed circuit pattern (L = 0.5 to 1.0mm/W = 0.5 to 1.0mm) i was wondering how exactly i do that, i never made a coil using the pcb traces (...)
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
some links about it : and on this page there is a software (free) to calculate such coils
Try Murata
Hi, In fact the coil is part of the pcb. Here is the pcb layout
Search for Class C amplifiers. Added after 15 minutes: Usually Class C amplifiers are connected to LC tank circuits because their conduction angle is only about 90 degree which is just quarter of a complete cycle. So they need something like Tank oscillator coil to restore back the original waveform.
I am looking for tag chip , not reader or writer chip. Well, there is a small project with transponder manageable via mcu . It was tested using normal tag via coil direct connection, but in production i would like to place chip, coil and remaining mcu stuff on same pcb, because using manufactored tags seems very poor solution . That is why (...)
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
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,
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 (...)
do want the coils embedded on a pcb?
Hi, I have problem with my pcb. I use several coils (ferrite choke) and I wonder how I must place that coils on the pcb. Best regards Lukee
In order to replace the relays you will need relays that will meet: - The same voltage for the actuator coil as the current relays, in your case seems to be 12 volts. - The same or higher voltage/current ratings on the contacts, your current seems to be 14V 40 A. - The same type SPDT, DPDT, etc. - The same pin configuration.
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
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
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.
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
At 40GHz, you coil will probably be a single turn or similar.. So, you don't need to connect inner end..
I have a Proxxon mains drill VERY pleased with it, metal gearbox end , it came with a full set of collets which will hold down to .005(?) diam. Cost about ?90 20 years ago. As for your question, I would always go for the mains version unless you are going mobile. Collets are different between manufacturers. I had used a "Dremel" type at work and f
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 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
According to tesla coil design, people favour NSTs because they have magnetic shunts that limit the current that can be drawn from them. So what if I was to power my flyback transformer driver from a main transformer rather than stuffing around with heavy car batteries. I would need a transformer that is limited to perhaps 15-20 amps to be safe a
Does anyone know good pcb manufacturers in Taiwan?
Web based calculations. Car Audio: Passive Crossovers/Capacitor & coil Audio: Passive Crossovers Index of Calculators, Charts, and Diagrams
Single/multilayer coil designer
coil calculator
Which software do you use in pcb layout when you design RF circuit? Is there any inofrmation about how to draw pcb board in RF design? Thanks in advnace.
Does anyone know about flush pcb - encoder application? Thanks rocknrule
Hi, Is anybody has pcb in Protel 99, Eagle oe something else except PDF files. I need also doublesided pcb for pcb-3b version Please let me know on PM or mail me at: agrocvet@mt.net.mk Thanks, ***************************************** Please don't reply unless you have useful information to add on this post. Thanks
Hi, I need to know if it is possible to build a simple Antenna for GSM (900 MHz) on a 0.8mm thick FR4 pcb. If not, is there any other simple solution to build an Antenna using a piece of wire (folded or bent in some way), for the GSM 900 band ? I need the antenna to be located inside a small Plastic Box (ABS material), coupled to a standar
hi guys! i have designed a 24v,4A low cost battery charger works in simple constant current mode as stand alone.also it is possible to control its output current/voltage by a microP or even a computer port,if an a/d card is available. its docs (sch & pcb)in protel format is available. if u want it respond to this letter! :smil
Anyone have a design or link to a GSM pcb aerial.
you just need to use a 5/8 wave stub on pcb load it up and couple it to a tight coil pick up system from one sid on pcb to another {this is a good stsem for tuning also} use a gdo and tune it up you can add loading coils as for software i agree there is none to be had (...)
I am looking for 8051 Schematic or pcb Eagle File with EPROM and I/O Connection for design of applikation. Can somebody help me?
Dear public! Will not prompt, what sch/pcb Design - programs for Linux are. Really qualitative packages (probably known, and it it is possible - and not so) firms are interesting. Eagle to not offer :)! pcb and shematic!
somebody knows some machine to make circuits without paper transfer something as printer pcb directly
Hello: I have build a FM radio using STR TEA5757, according Philips Application note AN99041. I have a problem with FM VCO alignment. If you align VCO coil the tunning voltage should change between 0.8V(88MHz) and 1.9V(108MHz), but in my pcb this isn't happen. If I align my VCO coil the tunning voltage is constant in all the FM band. (...)
Is there any source to get CHEAP Pcik and Place machines that work on SMT devices.. I am looking for a low (maybe mediam) production machine, that can successfully pick parts/chips/resistors from reel, place them on a pcb according to placement files..i.e. Fully ataumated (or maybe semi-automated).. Could be used for prototyping, or low production
Please, who can help me to find pcb test points (smd type) to use with standard oscilloscope probe?
Hi, I am willing to produce a pcb around a Motorola 555 microcontroller. But this is a BGA packaged chip and I can't solder it myself. Does anybody know of a company that can solder BGAs for proto boards (ie. not at a high cost and in indicidual quantities) ? PS: I'm in France, so please links only in European Union, thanks
who knows?