| Search found 259 matches on edaboard.com: enclosure enclosure abs plastic enclosure heatsink inside enclosure |
second harmonic in gsm(900)
in gsm 900, the gsm modem i am using has a radiated second harmonic more than -30 dbm (violates etsi). testing the modem revealed that the conducted second harmonic at 1800 was -42 dbm. my antenna gain at 1800 is 3 dbm. i am not sure where the 9 db g...
RF, Microwave, Antennas and Optics :: 19 Nov 2009 15:52 :: Wilson_yu_chen :: Replies: 8 :: Views: 807
sae j1939 signal simulator
now the long waiting six editions of au sae-j1939 simulator are well tested and released.these six editions of au sae-j1939 simulator are listed here: engine basic edition (h) engine premium edition (li) vehicle platinum edition (na) engi...
Microcontrollers :: 17 Nov 2009 2:49 :: funnynypd :: Replies: 15 :: Views: 2670
common mode noise absent?
he fet.there are no switch mode transformers.so can i assume that i havent got any common mode noise? -since there is nothing near the circuit to act to couple the noise out, except a gropunded metal enclosure -but thats at least 5mm away from any pa...
Power Electronics :: 06 Nov 2009 19:03 :: eem2am :: Replies: 0 :: Views: 51
difference between transceiver and transmitter-receiver?
hi allwhts the difference between transceiver and transmitter-receiver?thanks...
Analog Circuit Design :: 04 Nov 2009 8:00 :: Z-match :: Replies: 2 :: Views: 93
3d step models for altium?
hi,does anyone have a source or a link to a website that has 3d models for common components for use with altium designer?thanks...
PCB Routing & Schematic Layout software & Simulation :: 03 Nov 2009 2:39 :: Keith-Richman :: Replies: 15 :: Views: 1788
project to replace cy7c64613 in the icd2
i am evaluating the posibitity to replace the cypress usb on the icd2 with a pic18f2550 or similarreasons for this are:-cy7c64613 seems to be dificult to obtain. -lower price ($20 vs $10). -smd package requires a pcb and more or less skilled solderin...
Microcontrollers :: 23 Oct 2009 17:33 :: SG61-addict :: Replies: 1847 :: Views: 374297
help with wiring a voltage regulator
hello and tia!im trying to power a wireless camera off of a battery pack. but in doing so ive found out that it goes through batteries pretty quickly and so i started learning about them. so i am trying to use rechargeable batteries but have need of ...
Electronic Elementary Questions :: 14 Oct 2009 22:56 :: GhettoBSD :: Replies: 23 :: Views: 570
compact pickit2 pcb for diyer & fans, cost as less as $5
pickit2 diy print circuit board (pcb):http://images.elektroda.net/51_1194908985.jpgbare pcb board cost only us$5; component kits are also available..major features:fully compatible with microchip mplab idefull speed usbenhanced additional power suppl...
PC Programming and Interfacing :: 13 Oct 2009 0:58 :: funnynypd :: Replies: 24 :: Views: 4435
ne5532 versus tl072
hi,having tl072 high pass filter. but i want more crystal clear quality so decided to replace with 5532. may i do it without modifying the circuit??is it give good result?? or any other suitable and hi-fi chip available??thx...
Hobby Circuits and Small Projects Problems :: 12 Oct 2009 16:55 :: pauloynski :: Replies: 23 :: Views: 612
avago "3w mini-emitter" power led temperature
i tried playing with the 3w avago power leds. i soldered two of them onto a very thin piece of pcb material (0.5mm / 20 mil) and connected them in series. also added a resistor to limit the current to about 700ma when connected to a 12v source. the m...
Electronic Elementary Questions :: 11 Oct 2009 12:13 :: jumper2high :: Replies: 8 :: Views: 255
need enclosure for rf barcode reader
hi,i need enclosure for my product (handheld rf barcode reader with keypad), do you know where can i find suitable enclosure? thanks for advice....
Professional Hardware and Electronics Design :: 10 Oct 2009 7:00 :: pranam77 :: Replies: 3 :: Views: 521
patch antenna for gps receiver
l active antenna which i fix above the car.for reliability i prefer to use a patch antenna and embed it with the gps module.my question is could the patch antenna work fine if its embedded within the enclosure of the device?and if the whole device is...
RF, Microwave, Antennas and Optics :: 08 Oct 2009 12:20 :: alzomor :: Replies: 4 :: Views: 228
awr ultra wide band - long simulation times
hello i m designing ultra wideband antenna using partial ground plane in awr v8.03 but after making another layer for grnd plane, it takes a long time to simulate. i think i m not doing in the right way so please help me out. i m using mwo for the...
Electromagnetic Design and Simulation :: 07 Oct 2009 6:21 :: Manjunatha_hv :: Replies: 3 :: Views: 240
simple amp design question
is it possiable to make a audio amplifier for my mp3 player using the following components.two h945 http://www.datasheet4u.com/download.php?id=517451one mje13005 http://www.datasheetcatalog.com/datasheets_pdf/m/j/e/1/mje13005.shtmlone 6n c4242one c34...
Electronic Elementary Questions :: 05 Oct 2009 16:09 :: Audioguru :: Replies: 3 :: Views: 132
irfp250n - how to check input impedents and input db becs
i have irfp250n mosfet power amp(200w rms output with 35-0-35 rail) and want to know the input impedents and input db becs i am not getting output in driver even i am giving 20 db input. its better if i get a good preamp circuit for this..thx in adv...
Hobby Circuits and Small Projects Problems :: 01 Oct 2009 14:06 :: Audioguru :: Replies: 11 :: Views: 696
pcb design and fabrication service
i am looking for designers that can do pcb layout and get the board fabricated(initially prototype quantities) and assemble(parts supplied by me) it. i know there are many big companies that can do this but i have a very limited budget so i am lookin...
EDA Jobs, Promotions, Advertising :: 24 Sep 2009 6:46 :: EmbDes :: Replies: 8 :: Views: 957
pcb design help (315mhz with 1/4 wave dipole)
hi, i have never done rf layout before. this is a really simple board but i would like maximum range. :) i have a transceiver chip and antenna that are both matched at 50ohms and tuned for 315mhz. my problem is how to get a trace from chip to antenna...
RF, Microwave, Antennas and Optics :: 21 Sep 2009 17:22 :: biff44 :: Replies: 5 :: Views: 369
looking for metal enclosure manuf in china
i am looking for a manufacturer in china that can manufacture batches 100-500 pcs of small electronic sheet metal enclosures. enclosure will have a few cutouts, so some laser cutting or precision punching will be needed. surface finish to be powder ...
Mechanical Engineering and Design :: 19 Sep 2009 15:19 :: Unitechs :: Replies: 3 :: Views: 974
esd standard 61000-4-2
someone plz provide me esd testing standard 61000-4-2 or link to iti need it urgentlthanks in advance...
RF, Microwave, Antennas and Optics :: 12 Sep 2009 23:47 :: gian793 :: Replies: 7 :: Views: 1707
i need the iec62056 standard
i need the iec62056 standard.can you give me a help?my e-mail :aboutjiming@163.com thank u....
Professional Hardware and Electronics Design :: 05 Sep 2009 7:25 :: kanaknpk :: Replies: 3 :: Views: 1209
sim300d esd problem
hi all we did esd testing on the sim connector connected to a sim300d module in power off state.before the test everything was working fine but after the test i am constantly getting on request of at+cpin?cpin: sim errormy vdd_sim is showing 0v.one t...
Professional Hardware and Electronics Design :: 03 Sep 2009 10:01 :: angel_n_daemon :: Replies: 13 :: Views: 1045
auto switch circuit for bike light?
helloas this is my first post ill introduce myself. i am an aircraft technician in the army and am involved in the mech side of life. however i have a basic understanding of electrics and electronic circuits. ie. ohms law, power etc. i design and bui...
Hobby Circuits and Small Projects Problems :: 27 Aug 2009 20:47 :: betwixt :: Replies: 9 :: Views: 1000
temperature in led headlamp gets too hot?
ics knowledge.however, its the thermal situation thats hardest.as you know, some customers will have the headlights on in the daytime, in arizona at the height of summer. -because they can.the lamp enclosure is sealed, there is obviously no fan in ...
Professional Hardware and Electronics Design :: 25 Aug 2009 22:25 :: JMG :: Replies: 4 :: Views: 445
can the direction of the microwave be directed using magnets
hi guys,i wanted if the direction of the microwave can be directed using magnets.thanks...
RF, Microwave, Antennas and Optics :: 22 Aug 2009 12:52 :: pakitos :: Replies: 4 :: Views: 255
awr - partial ground plane antenna design
can anybody say to me if awr is capable to perform simulations of a planar antenna design using partial ground planes?...
RF, Microwave, Antennas and Optics :: 21 Aug 2009 21:01 :: alejor00 :: Replies: 5 :: Views: 468
building the pickit2 from scratch
microchip has offered the schematic here :http://www.microchip.com/stellent/idcplg?idcservice=ss_get_page&nodeid=1406&ddocname=en023805from what i gather, the firmware is also available here.so, before i build it myself, i would like to know if anybo...
Microcontrollers :: 20 Aug 2009 0:40 :: CanaKit :: Replies: 37 :: Views: 16236
transistor tester
has any body got a good reliable transistor tester schematics ic or microcontroler based ive searched the web but not found any that seem to be goodcheers snaper :?:...
Hobby Circuits and Small Projects Problems :: 08 Aug 2009 19:32 :: hadihf :: Replies: 151 :: Views: 37708
can air be heated?
dear friends.we need atmospheric air to be heated up to 500+ degrees celsius for an industrial application. but as per our various experiments since 2-3 years, we have seen the coil and the enclosure may heat more than 700+ degrees celsius but the a...
General :: 08 Aug 2009 17:55 :: mvs sarma :: Replies: 4 :: Views: 260
how to make 3d of our pcb design
hi all,i have encountered 3d model of our pcb beforewe make the pcb real one. could you let me knowhow to make the 3d model and what software used?thankssiswanto...
PCB Routing & Schematic Layout software & Simulation :: 04 Aug 2009 13:53 :: chakravarthy80pcb :: Replies: 17 :: Views: 10582
au fleet management syetem (fms) can signal simulators
july-13-2009au group electronics celebrates the new release of au truck / bus fleet management system (fms) can signal simulators:http://www.auelectronics.com/system-fleetmanagementsystemsimulator.htmhttp://images.elektroda.net/12_1247524961.gifsix ...
Microcontrollers :: 03 Aug 2009 15:16 :: funnynypd :: Replies: 4 :: Views: 531
pic12f683 magstripe reader
hi i m looking for a very small n low power portable magstripe reader i need circuit design pcb diagram sorce code to progran the pic chip download program for the dta store n in usb port help urgent...
Microcontrollers :: 03 Aug 2009 4:02 :: blueroomelectronics :: Replies: 5 :: Views: 207
linear led current regulator too hot?
hello,we have several linear led current regulators which powers altogether 52 red leds from a 13.5v batterythe power dissipated in the leds is 6 watts.the linear regulators (their resistors and transistors dissipate 3.5w.)all the leds and the regula...
Power Electronics :: 31 Jul 2009 14:37 :: Dmitron :: Replies: 3 :: Views: 333
antenna inside enclosure
if i am going to put an antenna inside a plastic enclosure what should i need to consider?what i can/cannot dothis is a zigbee applicationwill plastic have a great effect on my gain?directivity?front: lcd display+microcontroller (digital)back: power ...
RF, Microwave, Antennas and Optics :: 25 Jul 2009 12:31 :: biff44 :: Replies: 6 :: Views: 444
electronics inside car headlight
hello,i have to design smps led driver to go inside the enclosure of a car headlight.with the lamp off, (yes, off), on a baking hot sunny day of 35 deg c, how hot will it be inside the lamp enclosure? (roughly)-assuming the headlight is in the sun an...
Electronic Elementary Questions :: 24 Jul 2009 1:33 :: Audioguru :: Replies: 5 :: Views: 294
poly layer route
i am using poly layer to connect two gates.the distance between the two gates is 2 um and i am using it in a nand layout. i am working on 65nm process.1.is it necessary to cover the poly routing connecting the two gates with n-implant or p-implant la...
Analog IC Design & Layout :: 22 Jul 2009 7:52 :: kumarans :: Replies: 14 :: Views: 672
10w smps fails emc
hello,i work in a company that makes led lighting products that run off car batteries at about 13.5v and we are in washington.there are 5 members of staff in the electronics dept.eighteen months ago, the electronics dept was asked to design and buil...
Power Electronics :: 13 Jul 2009 18:46 :: dfullmer :: Replies: 4 :: Views: 385
feko help
plz someone provide me help/material to calculate shielding effectiveness of enclosure> how to calculate field at desired points i used ideal rec antenna but results are unsatisfatory or i m making mistakehelp plz...
Software Problems, Hints and Reviews :: 09 Jul 2009 2:14 :: minhdo :: Replies: 3 :: Views: 398
powerpc mpc8572 development platform for network equipment
powerquicc iii mpc8572 development platform for networking communication applicationto help the network equipment manufacturers simplify the system design and establish the intelligent network application, micetek provides mpc8572 development platfor...
Professional Hardware and Electronics Design :: 06 Jul 2009 6:46 :: candy227 :: Replies: 0 :: Views: 194
automotive abs ecu can simulator.
au group electronics is pleased to announce successfully developed an abs ecu can simulator with speed input. this device can be used to measure the vehicle wheel speed from the hall sensor and broadcast the speed information in a vehicle (e.g. subar...
Microcontrollers :: 04 Jul 2009 18:25 :: funnynypd :: Replies: 1 :: Views: 720
microchip icd3 is released today.
http://www.microchip.com/stellent/groups/devtools_sg/documents/devtools/%7eexport/en537580%7e5%7een006096%7epressreleaselayout/91640-1.pngmplab icd 3 has improved speed as compared with mplab icd 2 and supports most microchip pic and dspic devices.fe...
Microcontrollers :: 04 Jul 2009 12:30 :: funnynypd :: Replies: 10 :: Views: 4854
error when importing gds and cif files using cadence
hello, hope somebody can help me with thisi export a layout to a cif file using cadence / pipo 5.0.0, when importing i get a few warnings and error:*warning* invalid cell view -- 167679020*warning* invalid cell view -- (unknown)*warning* dbgetcellvie...
Analog IC Design & Layout :: 02 Jul 2009 0:33 :: rod_pro :: Replies: 0 :: Views: 137
vme chassis
hai what is vme chassis?? and what 4u, 6u or 9u inidactes in datasheets?? and what is backplane??...
Electronic Elementary Questions :: 09 Jun 2009 15:19 :: priyadarsini g :: Replies: 4 :: Views: 447
how to use mwo emsight? or emsight tutorial?
im all wet when trying to use emsight the first time. have a ton of errors and have no idea what it means (schematic ampgain). i think it has to do with port assignments but im not so sure. im grateful if you can look into my attached file to guide m...
RF, Microwave, Antennas and Optics :: 02 Jun 2009 23:08 :: UKnowWhat :: Replies: 3 :: Views: 294
boost converter emc
hello.i am doing a boost converter 12v in (battery) 20v out. just 12w.it is to go in a metal enclosure which is not connected to earth ground.now some of the circuit current will couple to the enclosure (magnetically and capacitively due to stray in...
Power Electronics :: 01 Jun 2009 20:00 :: eem2am :: Replies: 3 :: Views: 576
led lamps vs fluorescent lamps
hello,i have been working on domestic mains white led lighting (for sale to the cheap-end, mass market) for a while.i have been working at the 15w level as this is equivalent luminous output to a 60w incandescent.however, there are multiple problem...
Power Electronics :: 31 May 2009 1:16 :: 20pilot :: Replies: 1 :: Views: 2092
electromagnetic simulation
hi guys someone please give help to following simulation problems i facedi simulated a honey comb installed on a enclosure on cst results are accuratebut feko gives not more than 80db (shielding effectiveness)wheras cst gives upto 180db.on hfss i am...
Electromagnetic Design and Simulation :: 21 May 2009 15:55 :: emc44 :: Replies: 0 :: Views: 270
where to get enclosure like this
hi,i would like to know its english name also:...
Hobby Circuits and Small Projects Problems :: 21 May 2009 12:42 :: banjo :: Replies: 1 :: Views: 255
air flow & heatsink- convert cubic feet per minute to li
sing a to220 heetsink for a power resistor, the heatsink datasheet include a graph of the thermal resistance versus the air flow velocity in linear feet per minute.the pcb will be inclosed in a metal enclosure, the fans in this enclosure produce prod...
Analog Circuit Design :: 15 May 2009 14:54 :: eem2am :: Replies: 1 :: Views: 168
schematics for icd2
is there someone who has the schemtaic for icd 2 ?...
Microcontrollers :: 08 May 2009 8:28 :: neokid :: Replies: 271 :: Views: 121185
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ads and hfss mmic integrated simulation
is a series ofmicrostrip+active device+microstripthe three are connected together by bondwire, and enclosed in a box.i also have the rfow measurements of the active device.i design in hfss the entire enclosure by putting the microstrip parts and wire...
Electromagnetic Design and Simulation :: 02 May 2009 18:17 :: millioby :: Replies: 2 :: Views: 324
grounding the enclosure on shielding effectiveness
i need suggestions from people about affcets of ground the enclosure on shielding effectiveness.somebooks says there is no need to groun the enclosure (isolated, no penetration) as far as shielding effectiveness is concerned.and i see currents in enc...
Electromagnetic Design and Simulation :: 30 Apr 2009 12:08 :: waseem44 :: Replies: 3 :: Views: 297
these are many signal isolators datasheets,share to you.
detailed info:din3 series low cost, small size passive isolation amplifier.http://www.szsunyuan.com/sy/upload/din3%20iso4-20ma.pdf(1) 0 ~ ± 10v / 0 ~ ± 20ma dc signal isolation converters, low-cost, small size, can be welded dir...
EDA Jobs, Promotions, Advertising :: 28 Apr 2009 2:17 :: Candy8866 :: Replies: 0 :: Views: 720
free sample list...
someone ever seen a page which links all companies who offer online sample ordering?might be also a good choice for selecting certain companies over others......
Professional Hardware and Electronics Design :: 20 Apr 2009 8:43 :: ozenk :: Replies: 313 :: Views: 148188
why my s21 is different in momentum simulation?
hi friends, i am simulating bandstop filter(5.5g~6.5ghz) in momentum.when i set the stop frequency as 7.5ghz,i got:http://images.elektroda.net/68_1238980989_thumb.jpgand if i set the stop frequency is 8ghz,i can get:http://images.elektroda.net/29_...
RF, Microwave, Antennas and Optics :: 08 Apr 2009 18:30 :: biff44 :: Replies: 8 :: Views: 429
screw on pcb? can i put thread on the pcb? or bolt/nut?
hi, everyone.i have a question of the screw on pcb. i want to put some screw holes on my pcb for fastening it on an enclosure. can i put the thread on the pcb? or can i use bolt/nut?should i use the major diameter, pitch diameter or minor diameter of...
PCB Routing & Schematic Layout software & Simulation :: 04 Apr 2009 22:50 :: cyberrat :: Replies: 2 :: Views: 300
suggestions for high power high voltage led buck driver
leds in series. i would like to drive it from about 0-1a at about 12-16v. my supply voltage will range from 30-48v. i will be using an avr to control this. due to the high power, and how small of an enclosure this will be in, im looking to maximize ...
Analog Circuit Design :: 04 Apr 2009 16:42 :: uoficowboy :: Replies: 0 :: Views: 309
microstrip patch atenna in microwave office problem
hi friendsim trying to simulate microstrip patch atenna by using microwave office software on dielectric substrate of second layer of 2 layers enclosure. 1st layer is air with er=1. it is suppose that the height of the 1st air layer is not active on...
RF, Microwave, Antennas and Optics :: 29 Mar 2009 19:40 :: hasanalhasnawy :: Replies: 5 :: Views: 666
feko help
someone please help me i have recently started using feko i modelled a enclosure and wat t calculate shielding effectivness my problem is i change the thickness but cannot see difference in shielding effectveness smeone plz help me how thicknessare p...
Electromagnetic Design and Simulation :: 16 Mar 2009 16:30 :: waseem44 :: Replies: 9 :: Views: 381
ethernet shield connecting, where to put...
dear all,i am developing a board with ethernet on-board (phy+transf).due to size constraint i cannot mount an rj45 connector on the pcb but i have toconnect the tx+-, rx+- signal with four wires that go from the board and connect them with a twisted ...
Professional Hardware and Electronics Design :: 13 Mar 2009 8:31 :: mondoemme :: Replies: 5 :: Views: 258
capacitive power supply
hi guys,i used this capacitive power supply to run some led from 240vac.r1=2w10r metal oxide resistorc1=1.5uf 450vac(x2 type)c2=220uf 35vd1=24vd2=1n4007the output around 35vdc. everything running smoothly. but when i switched off the main 240vac, the...
Professional Hardware and Electronics Design :: 08 Mar 2009 9:39 :: me_guitarist :: Replies: 14 :: Views: 924
pbg/ebg microstrip filter in annsoft desginerfilter
hi,please any one knows how to set the port in ansoft desginer for a finite ground plane.regards...
Electromagnetic Design and Simulation :: 03 Mar 2009 18:00 :: si14 :: Replies: 8 :: Views: 963
emc/emi
hii alll , i am new in pcb designing using allegro 15.7 .can any body please help me to know , wat is emc and emi and in pcb wat are the things which affects it ,thanks in advance...
PCB Routing & Schematic Layout software & Simulation :: 02 Mar 2009 1:34 :: pcbdesigner34 :: Replies: 3 :: Views: 663
rf unit / shielding enclosure / rf going through usb cable
hello!i think this the right place for my issue :-)ok, i got a 2.4ghz receiving rf unit with:- an rf part- a microcontroller part - an uart to usb circuit. i use an alubos enclosure. see http://www.bopla.de/en/product-catalog/enclosure-technology/pro...
RF, Microwave, Antennas and Optics :: 28 Feb 2009 10:08 :: jabidof :: Replies: 6 :: Views: 1929
what type/size of fan for my enclosure?
i am building an enclosure for some electronic equipment (made of sheet metal) and am planning to add a fan (fans?) for cooling. i guess the type of fans would be dc axial fans, but i am wondering about the size, flow ratings etc. also, should the ai...
Professional Hardware and Electronics Design :: 27 Feb 2009 5:40 :: cameo_2007 :: Replies: 1 :: Views: 123
four car speakers - ideas for a good use for them
i have four car speakers and im tryin to figure out a good use for them. any ideas of what i can make?...
Electronic Elementary Questions :: 23 Feb 2009 23:43 :: AndyECE :: Replies: 2 :: Views: 201
2.4g antenna issue - basic questions
hello all,i am a newbee in antenna design and stuff. i have been working on a 2.4g rf module. i have some basic questions about the usage of antennawith this module.1 > what is relation ship between the gain of an antenna and the distance it can ...
RF, Microwave, Antennas and Optics :: 23 Feb 2009 17:15 :: vfone :: Replies: 3 :: Views: 330
new service: online machining
as many pcb users will ask for metal parts, enclosures etc., we started our online machining service several weeks before. its a extreme easy and cost effective way to make custom parts online. what you need to do is just click mouse for several seco...
EDA Jobs, Promotions, Advertising :: 20 Feb 2009 4:37 :: gigahertz :: Replies: 2 :: Views: 330
most suitable temperature for a coolinf fan to turn on
i hv searching for the most suitable temperature for a coolinf fan to turn on. anybody can help me with it?...
Hobby Circuits and Small Projects Problems :: 17 Feb 2009 13:57 :: intan :: Replies: 4 :: Views: 159
dfm
can anyone tell me the flow of dfm or can anyone provide me a book on dfm..........dfm flow was asked by intel people to me can anyone give me the details of this plz as i am badly in need of it bye take care...
ASIC Design Methodologies & Tools (Digital) :: 17 Feb 2009 8:03 :: sreevyas :: Replies: 8 :: Views: 597
design of low noise amplifier in 'tech_c35b4'
hello, i have a great problem...i have to design a low noise amplifier , who has the following features:1)v dd = 3v2)zindiff = 200Ω (rsdiff = 200Ω)3)i bias = 5ma4)f 0 = 1.8ghz5) all the transistor should have minimum legth-i have to use a d...
Analog IC Design & Layout :: 11 Feb 2009 8:47 :: macg84 :: Replies: 4 :: Views: 333
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