https://groups.google.com/d/forum/sci.electronics.designsci.electronics.designElectronic circuit design.Google Groupsmkr50002016-07-23T16:56:01Zhttps://groups.google.com/d/topic/sci.electronics.design/RRYPvCg0OKg1206 and 0805 -- availabilityMy crap software (that I know how to use in my sleep) works better with 1206 size parts rather than 0805. When it's time to actually buy the parts is 1206 still readily available? basic parts like res, caps, etc -thanksSkybuck Flying2016-07-23T15:49:50Zhttps://groups.google.com/d/topic/sci.electronics.design/UfwO1DsANxsWhich subwoofer sounds most like Gigaworks S750 ?Hello, Within a few days a nice new piece of music will come out, the alt.c64 is a hint at that. Anyway first I will listen to the new music on my current audio setup. However the music will sound even more awesome with a powered-subwoofer, a subwoofer which is currently lacking from myTom Del Rosso2016-07-23T14:23:32Zhttps://groups.google.com/d/topic/sci.electronics.design/rPfrH28ceswSenior VoltOhmystwww.ebay.com/itm/112060621395 It seems to be just a volt/ohm meter, literally, with no current function, but from where does the name Senior VoltOhmyst derive? --rickman2016-07-23T02:34:12Zhttps://groups.google.com/d/topic/sci.electronics.design/KKBLTLbGCp0Thunderbird LightningI use the Lightning calendar and one thing I'd like to change is the small size of the category color in the calendar item. In the month view the item shows as a bar with the background color of the calendar with a very narrow strip on the right edge with the color from the category. I'd likeJohn Larkin2016-07-22T23:56:48Zhttps://groups.google.com/d/topic/sci.electronics.design/wM0SvgA6Bgkjfethttp://www.onsemi.com/PowerSolutions/product.do?id=NSVJ2394SA3&featured=featured This looks similar to the BF862. Noise is characterized as nf relative to 1K ohms, around 1 dB. What is that in nv/rthz? The 1/f corner looks pretty low. -- John Larkin Highland Technology, IncSteffen Koepf2016-07-22T17:10:35Zhttps://groups.google.com/d/topic/sci.electronics.design/D7XbxjFOWEkWhat to do with an unused DVI link at transmitter side?Hi, i am designing a single board computer with a DVI-Interface for video. Only link #0 is used and the question is, what to do with the unused three link #1 channels (3, 4, 5)? According to DVI-Standard Rev 1.0, Single-ended standby (off) output voltage, V OFF is specified as AVcc ±10mV,mkr50002016-07-21T19:30:25Zhttps://groups.google.com/d/topic/sci.electronics.design/FeaDc9lRQc0Long length switched groundAs nothing more than a life long electronics enthusiast without a degree other than popular electronics magazine and a distaste for math, I have the following embarrassing question for the design wizards. My design skills often times are "if it works for a couple of days and doesn't get hotJim Thompson2016-07-20T23:02:13Zhttps://groups.google.com/d/topic/sci.electronics.design/_i73cUUvD58Sziklai Squared ??Seeking a simple unity-gain amplifier with which to make an S-K lowpass filter I came up with this as I compressed functions... <http://www.analog-innovations.com/SED/SziklaiSquared.png> ...Jim Thompson -- | James E.Thompsonbitrex2016-07-20T22:28:51Zhttps://groups.google.com/d/topic/sci.electronics.design/iPlk5UA6q34Driving LEDs with constant voltageI have some 7-segment displays I'd like to drive from a uP output...the segments have a common cathode. 5 volt digital outputs from the uP are available, and the red LED segments have a forward voltage of around 2.something volts. Current-limiting resistor networks are annoying..so I wasbill....@ieee.org2016-07-20T15:07:43Zhttps://groups.google.com/d/topic/sci.electronics.design/lHFkiSHjb8MOT Paleocene-Eocene Thermal Maximum - new paperThe Proceedings of the (American) Nationa Academy of Science has just published a paper giving new data on Paleocene-Eocene Thermal Maximum. The Thermal Maximum - a roughly 6 degree Kelvin temperature rise over a thousand years or so - seems to have been driven by a sudden surge of methaneTim Wescott2016-07-19T23:20:28Zhttps://groups.google.com/d/topic/sci.electronics.design/aBKfFFw74kcItty bitty O-scope probesThe world is getting smaller, and my O-scope probes are the same size as they were in the 1980s. A search on "miniature oscilloscope probes" got hits on stuff not much smaller than I'm using now, although my Google Fu is generally spotty. Does anyone make Really Small oscilloscope probes?John Larkin2016-07-19T18:05:55Zhttps://groups.google.com/d/topic/sci.electronics.design/1y8HhgppZF4cool paper on whiskershttp://nepp.nasa.gov/whisker/reference/tech_papers/2012-Panashchenko-IPC-Art-of-Metal-Whisker-Appreciation.pdf "Whiskers are making a mockery of 60 years of research." -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnologyJeroen Belleman2016-07-19T15:07:37Zhttps://groups.google.com/d/topic/sci.electronics.design/uC9ATsYwa14Anyone has news of Jan Panteltje?Jan Panteltje was a regular poster on this group, but we haven't heard of him since March last year or thereabouts. Does anyone have any news? Jeroen Bellemanorend...@gmail.com2016-07-18T23:16:17Zhttps://groups.google.com/d/topic/sci.electronics.design/NH_wP_MwyksDC DC ConverterHi, anyone know about a DC DC converter with an input range of 300VDC to 450VDC, with an output range of 12VDC to 14VDC at 50A? thanks.Jim Thompson2016-07-18T20:48:14Zhttps://groups.google.com/d/topic/sci.electronics.design/9yZcar5SG8ECurrent Transformer/Sensor at 60HzI need to sense ~200mA AC at 60Hz. Is there a CT rated for such use or should I just cobble up an old filament transformer? ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovationsgm2016-07-18T17:17:43Zhttps://groups.google.com/d/topic/sci.electronics.design/O8P9Fn_nQsscurrent sensor for arduinoHi. Am looking for some ready made solution that i can use for detecting current change. The input can be 220V or 50V AC ( depending from device ). Basically, this will be current limitation based on arduino. When the current is to high, relay will trigger one other device. There is someJohn Larkin2016-07-18T15:42:04Zhttps://groups.google.com/d/topic/sci.electronics.design/R8OZIy9pumgARM is soldhttp://www.reuters.com/article/us-arm-holdings-m-a-softbank-group-idUSKCN0ZY03B This could be bad. Maybe the world needs an open-source RISC architecture. -- John Larkin Highland Technology, Inc lunatic fringe electronicsJohn Doe2016-07-18T12:07:00Zhttps://groups.google.com/d/topic/sci.electronics.design/3iVulXcJcmwOT: Baton Rouge shooter's YouTube channelYoung man ex-Marine. Maybe too frustrated by the criminalization of gender roles (I am still reviewing his videos). So far, nothing having anything to do with religion. I'm working my way towards the beginning where there might be some lamenting about his work as a Marine in Afghanistan/Iraq/wheN_Cook2016-07-18T08:31:24Zhttps://groups.google.com/d/topic/sci.electronics.design/GyhdwMC5Flstemp sensor 3pin IC, marked AZP18On a neat compact SMD device as 3 stage cold alarm, preset temps. I wish to lower the presets about 3 degrees, powered for 10 years of a small Li cell. Assuming no temp sensor inside the PIC chip, 3 pin SMD marked U1 on the overlay, and code marked AZP18, is probably a temp sensor. No infoDaveC2016-07-17T20:13:26Zhttps://groups.google.com/d/topic/sci.electronics.design/4LM317THXRsHelp identifying connectorhttp://imgur.com/a/6qeua (The images of the plug are stills from a video. I don’t have it in my possession.) The header measures approx.: pin dia: 0.6 mm,0.024 in spacing: 3.85 mm, 0.152 in How can I identify the type of shell and pin used in this connector? Thanks.SilverLeo2016-07-17T07:56:50Zhttps://groups.google.com/d/topic/sci.electronics.design/PT8N8rvpT1kPhototransistor fed to a transimpedance amplifierHi all. I'm running through some test of a phototransistor signal conditioner, and I'm facing with wild noise issues. The conditioning is a basic TIA stage: http://i.imgur.com/PcgglKZ.png Feedback resistor is 5K, feedback capacitor is 470pF, negative bias is -12V, and photocurrent is in theJim Thompson2016-07-16T20:49:38Zhttps://groups.google.com/d/topic/sci.electronics.design/dPZc4QwioTgOT: The Californica "Paradise"The Californica "Paradise".... <http://tinyurl.com/gq3m7gp> ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-SignalTim Williams2016-07-16T18:29:51Zhttps://groups.google.com/d/topic/sci.electronics.design/Krt334zB-4wCascode emitter followerWhat think ye? Purpose: increase the output voltage range of an emitter follower. Like, the complementary follower in the output of an audio amp. But maybe not for audio, but for 50 ohm loads, hence the need for high voltages. Since, obviously(?), no 500V+ RF transistors exist*. And ofJim Thompson2016-07-16T14:45:39Zhttps://groups.google.com/d/topic/sci.electronics.design/Y6ZRj90SdpEOT: Brexit's First Success Story...OT: Brexit's First Success Story... < http://dailycaller.com/2016/07/14/britain-shuts-down-its-global-warming-agency/> ...Jim Thompson -- | James E.Thompson | mens | | Analog InnovationsSylvia Else2016-07-16T11:19:07Zhttps://groups.google.com/d/topic/sci.electronics.design/BkKQ3NkoJkUAnother mobile phone radiation devicewww.lif3smartchip.com.au/ This is being marketed in Australia, including in a main-stream store. What are we to make of it? My immediate suspicion is of a large helping of BS. If the device absorbs radiation that would otherwise go through your head, and if that's the direction of the cellPhil Hobbs2016-07-15T19:05:58Zhttps://groups.google.com/d/topic/sci.electronics.design/ll66nVQ5K8QTek TDS 744A -> TDS 784A upgrade hack!Hi, all, Just wanted to report success in upgrading my TDS 744A scope (500 MHz, 2 gigasamples) to a much swoopier TDS 784A (1 GHz, 4 gigasamples). It now identifies itself as a TDS 784A everywhere except the printing on the bezel. Passes all self-tests and SPC. Turns out you just have tospanson benson2016-07-15T18:25:37Zhttps://groups.google.com/d/topic/sci.electronics.design/erpjcuJyw8YBUY MEDICATIONS ONLINE CONTACT:email@example.com/ +19846642645to buy medications from us go our website: www.stvinnycluchclinic.doodlekit.com.We deliver to all countries and we are rliable to deal with and fast in deliveries. :Oxycontin 40 mg = $8 a pill. Minimum order 25 pills $200. 50 pills = $350. - Oxycontin 80 mg = $15 a pill. Minimum order 25 pillsJohn Larkin2016-07-15T00:31:21Zhttps://groups.google.com/d/topic/sci.electronics.design/RpS8zuizgtEinverse betaAnybody know the the typical inverse beta (positive base current, negative collector current) of a typical NPN gumdrop transistor, like a BCX70 maybe? I suppose I could get off my swivel chair and measure it. I want to be sure that a signal stays near ground during powerup, so an NPN with someJM2016-07-14T21:08:30Zhttps://groups.google.com/d/topic/sci.electronics.design/EYS_wTa0nQ4OT Complex analysis book recommendation?I need to get someone up to speed on the application of Z-transforms. My standard reference on this topic is EI Jury's text, but it does assume a knowledge of complex analysis which seems to be a bit beyond that which is taught to engineering undergraduates. ATM, Jury's book it might as wellJim Thompson2016-07-14T19:19:40Zhttps://groups.google.com/d/topic/sci.electronics.design/95J5MFjr9kIOT: Archiving a Sub-Directory, Preserving PathsII have a directory tree: C: PSpice DeviceLib X-Fab XB06 NewLib I want to just zip the contents of directory NewLib (and its subdirectories), but maintain the path information in the archive all the way back to C: (withoutRob2016-07-14T17:57:10Zhttps://groups.google.com/d/topic/sci.electronics.design/mSweceh27QQhints for design of a DDS?I am looking for information and hints for the design of a Direct Digital Synthesizer that should generate a narrow-band FM signal from a reference frequency and numerical parameters. Not to design it to the circuit level myself, but to get some hints about what kind of block diagram to use,Jim Thompson2016-07-14T14:26:09Zhttps://groups.google.com/d/topic/sci.electronics.design/wfuNYRFxls4OT: Sno-o-ort<http://autooverload.com/comical-photos-from-walmart/18/>daku...@gmail.com2016-07-14T04:09:37Zhttps://groups.google.com/d/topic/sci.electronics.design/-eguoFF-vqcReactive energy recoveryCould some electronics guru please shed some light on this topic. What would be a good way to recover reactive electrical energy ? I have searched on Google, several people have claimed it is possible, but lack any details as such information is patent protected. Any hints/suggestions wouldamdx2016-07-14T01:47:12Zhttps://groups.google.com/d/topic/sci.electronics.design/fyF4pvRVyisBad Cap on my air conditionerWife called me and said the house temp was 81* and the thermostat was set to 78*. I poked around and happened to be outside near the compressor/condenser unit when the compressor started. I noted the fan on top did NOT start, (lucky to be in the right place at the right time) I grabbed aJim Thompson2016-07-14T01:33:02Zhttps://groups.google.com/d/topic/sci.electronics.design/I72UAn2hgaIFluorescent FixturesI have five two-tube fluorescent fixtures in my garage/shop. Being lazy I leave them on 24/7 rather than groping for the switch. How much power do those typically pull? If it's significant I'll add motion-sensor turn-on. ...JimM Philbrook2016-07-14T01:10:54Zhttps://groups.google.com/d/topic/sci.electronics.design/BIhhdHhDVHsExttech Clamp Combo meters.I just got a Extech 845 clamp meter to replace the one that never came back after lending it to someone.. For what ever reason, the DC clamp function failed with a large OFFSET error. I used it once for this function to measure a load < 10 amps, and it correctly reported ~ 4 amps. The offsetJohn Larkin2016-07-13T23:29:06Zhttps://groups.google.com/d/topic/sci.electronics.design/Uhs-K3NPqp0Rigol scope step responseshttps://dl.dropboxusercontent.com/u/53724080/Gear/Rigol/Rigols_Step.zip This is pretty weird. I don't think we are doing anything wrong here. -- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlrickman2016-07-13T15:21:51Zhttps://groups.google.com/d/topic/sci.electronics.design/qpiqiLzvz0ESoftware Controlled UpgradesI bet you think this is about features that are largely software which can be enabled by a simple software upgrade... at a fee of course. Or maybe you think this is about software enable to hardware features that cost very little to add but can bring additional revenue and so become "features"Mark Barrie2016-07-13T03:56:02Zhttps://groups.google.com/d/topic/sci.electronics.design/G1Dc5Qb2IFQNew Product WantedMy name is Mark Barrie. I am the Managing Director of EDAC Electronics Australasia. For 26 years plus we have been marketing remote monitoring, control and alarming equipment in Australia and New Zealand. Our website is www.edac.com.au if you would like to have a look. I am currently lookingsms2016-07-13T00:30:43Zhttps://groups.google.com/d/topic/sci.electronics.design/ciQ-exkz8Z8Using Raw Li-Ion Cells with a Protection BoardI need a small Li-Ion charger/protection board for a 3 cell (series) pack, i.e. http://www.tenergy.com/Protection-Circuit-Module-11-1V-Li-Ion-Polymer-15A-Limit. If I understand this correctly, this is for use only with unprotected Li-Ion cells because it has the protection circuit for each ofbitrex2016-07-12T17:52:35Zhttps://groups.google.com/d/topic/sci.electronics.design/1CC--42mzcgDriving 74LS from 3.3V uPPrototyping a little toy for the kiddos out of junk box parts... I have a IV-9 Numitron connected up on a PCB to a 74LS47 BCD to 7 segment driver. uP is a 3.3 volt ATTiny (Adafruit "Trinket" devboard) powered via an on-board LDO directly off a 3.7 V 150mAh lipo. 3.7 volts is boosted to around 5Jim Thompson2016-07-12T15:07:33Zhttps://groups.google.com/d/topic/sci.electronics.design/wim-48AHJLsOT: Speaking of ToastSpeaking of Toast... We have a Toastmaster toaster... "Design by F.A.Porsche" no less... sleek, pretty, which is why my wife bought it, but it's crap for function... uneven toasting, poor repeatability, etc. I'm mostly a "toast for breakfast" person, so I'm looking for a good functionalNicholas Randall Forystek2016-07-12T07:17:29Zhttps://groups.google.com/d/topic/sci.electronics.design/TDOjOPxOeR4.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Kevin Foster2016-07-12T05:47:56Zhttps://groups.google.com/d/topic/sci.electronics.design/pCm5V2sYJIwHartley Oscillator: Two Coils, No CapWould it be possible to build a single transistor Hartley oscillator by substituting a pancake (spiral) coil for each leg of the center-tapped inductor, and then placing one coil flat on top of the other so the insulation between them takes the place of the cap? If the current in each coil isiaeng_pub...@iaeng.org2016-07-12T02:21:13Zhttps://groups.google.com/d/topic/sci.electronics.design/AsVycnhvktQCall for Papers Reminder (extended): World Congress on Engineering and Computer Science WCECS 2016Call for Papers Reminder (extended): World Congress on Engineering and Computer Science WCECS 2016 Draft Paper Submission Deadline (extended): 19 July, 2016 Camera-Ready Papers Due & Registration Deadline: 30 July, 2016 WCECS 2016: San Francisco, USA, 19-21 October, 2016 http://www.iaeng.org/WTim Wescott2016-07-11T17:59:19Zhttps://groups.google.com/d/topic/sci.electronics.design/ssX3yPb8qD4Boring old connectors -- 7.5A, smallest possibleSo, I'm looking for the smallest possible connector that's rated for 7.5A or more. This one is looking OK: http://www.digikey.com/product-detail/en/molex- llc/0026605020/WM4640-ND/87394. The size is reasonable for my application, but the mating housing only takes up to 18-gauge wire. It'sJohn Larkin2016-07-11T15:25:33Zhttps://groups.google.com/d/topic/sci.electronics.design/x9_48m9xZfktea and toasthttp://www.telegraph.co.uk/news/2016/05/10/eu-to-launch-kettle-and-toaster-crackdown-after-brexit-vote2/ Seems to me that the more power you apply in an electric kettle, the more efficient it is. Toasters ditto. -- John Larkin Highland Technology, Inc lunatic fringe electronicsTim Williams2016-07-11T09:09:24Zhttps://groups.google.com/d/topic/sci.electronics.design/_11oNvC2t-EHOTs *can* handle 1200VIn fact, most HOTs (Horizontal Output Transistor -- 1500Vcbo, 5-20A, Vce(sat) 2-5V @ hFE = 2.5) handle 1600-1800V at breakdown. Most trigger in avalanche rather slowly (~100ns), though I've seen a few that go quickly (<50ns?). Trouble is... when they do fire sharply, they only go once, thenJim Thompson2016-07-10T21:38:48Zhttps://groups.google.com/d/topic/sci.electronics.design/NATvxuLOi7cPing Hobbs: JFET NoisePhil, I have a chip situation, differential input, HiZ required. I have available to me NJFET's (sizeable) and good NPN's. What's the best differential configuration for low noise? The customer thinks NJFET follower into the NPN base. Suggestions. Thanks!Bill Bowden2016-07-10T02:48:10Zhttps://groups.google.com/d/topic/sci.electronics.design/xbqErJisGfoFractalsI hear fractals are used for designing cell phone antennas to maximize receptive power in a minimum amount of space. So why can't you just use a length of wire wound in a spiral arrangement to occupy the same space with the same length of wire and do the same thing? Why the complex pattern?