hybridfree/eevblog-posts huggingface dataset:
IBIS models? New to me - Page 1
Forum section: electronics / projects

author: Northy
author_rank: Regular Contributor
timestamp: October 18, 2023, 05:40:27 pm
content: Hi all,I asked Microchip for the output impedance of a driver output and all they are able to do for me is give me the IBIS model.If I'm totally honest I have no idea what it is or how to use it?Can somebody give me a dummys guide to them please?Thanks,G

author: ataradov
author_rank: Super Contributor
timestamp: October 18, 2023, 05:58:45 pm
content: https://blog.lamsimenterprises.com/2010/12/22/drivers-output-impedance-from-ibis/IBIS models contain a set of I/V curves under various test conditions. From this information you can derive other parameters.There was also a visual viewer from Siemens, but it is no longer available due to "Recent changes in US federal regulations". Which is stupid because it was a trivial application with Win95 style interface. There may be other sources that have is archived. But that viewer is not all that useful anyway, it just lets you see the information in a graphical form, it does not do a lot of calculationsYou can just look at it in a text editor, the structure of the file is self evident, and there is a formal description of the format for minor parts that are not clear.
IBM Lenovo have software to monitor and control battery recharge, capacity. - Page 1
Forum section: electronics / projects

author: Lawsen
author_rank: Frequent Contributor
timestamp: May 20, 2011, 07:52:47 pm
content: I got the battery gauage software to calibrate to the actual current and voltage of the aftermarket Sanyo Electric LiMn2O4 battery. I got it to set at 80% capacity, a good 10% improvement from 18 Wh to 20 Wh. The theoretical limit is 25 Wh. It seems to limit it 10% less than the theoretical for a safety margin to prevent over heating the LiMn2O4 battery. 20 Wh will give the tablet PC run time around 1 hour and 50 minutes, just 2 hours for a compact, smaller, and lighter battery. I Pad 2 has the advantage of 8 hours theoretical run time, but actual run time is more like 6 hours and needs replacement every two years. The actual is not the same as theoretical specifications written on the brochures. You have to try it, before knowing it like tasting food, trying clothes, test riding and driving. I tilt the tablet PC up to exposed the battery surface to air for better cooling during the calibration and discharge and recharge, keep the battery as cool as possible. I fixed it.The Lenovo IBM battery monitoring and recharge software is conservative to prevent the overheating and fire of the Sanyo Electric LiMn2O4, lithium di manganese tetra oxide battery. Li ion is generic name of large variety of ionic chemistry compounds and endurance, electron density capacity, internal resistance, and safety. I used another X41 set for a larger capacity battery to condition the lower capacity battery to give it a full charge and recalibrate the X41 software that is under charging the battery. The problem is only aftermarket batteries are available for six years old X41. Lenovo IBM no longer support vintage tablet PC.Lawsen
IBM PC/XT workalike project - Page 1
Forum section: electronics / projects

author: technix
author_rank: Super Contributor
timestamp: March 28, 2017, 09:11:18 am
content: I have found all chips for an IBM PC/XT workalike. This is going to be a retro-style design challenge.Design goal:* Single-side load only.* Preferably double-side board.* No larger than ATX form factor. Should the size match a standard PC motherboard size (e.g. 170x170 mini-ITX,) match the mechanical requirements too.* Follow IBM PC/XT architecture as close as possibleChips to be used:* 80C88 CPU* Socket for FPU* 82C84 clock generator* 82C88 bus controller* 3x 74HC573 bus latch* 2x 82C37 DMA* 2x 82C59 PIC* 2x 82C53 PIT* 2x AS7C4096 512k x8 SRAM* AT28C256 64k x8 EEPROM (BIOS)* CH395 Ethernet interface* CH375 USB Interface with mass storage driver* HD44780-compatible LCD module* EPM7128S CPLD as bus controller

author: ale500
author_rank: Frequent Contributor
timestamp: March 28, 2017, 04:24:17 pm
content: Nice project !I always thought that a SRAM-based PC would fly compared with what we had in the 80s, 90s. I have been toying myself with such a build but FPGA based, there are tow or three ready to used x86 processors, with external SRAM one could have some real fun.I VGA controller would also be a nice idea.

author: technix
author_rank: Super Contributor
timestamp: March 28, 2017, 04:46:02 pm
content: I could not find a VGA controller. (I have another project that also needs a similar controller...)Depend on now new your FPGA is, you may have to use a more modern chip like:* AMD Am486DX4 processor* 3.3V/1.8V dual VDDIO FPGA as combined north and south bridge,* A single DDR3 SODIMM slot for a single 4GB stick, operating at either DDR3-1333 or DDR3-1600,* 24 PCIe channels organized into a PCIe x16 full size slot (for GPU,) a PCIe x4 M.2 slot (for NVMe SSD,) a PCIe x1 M.2 slot (for Wi-Fi,) and onboard PCIe peripherals (Gigabit Ethernet, USB 3.1 and Sound, PCIe x1 each)* 32MB NOR Flash to hold the UEFI firmware, derived from the TiernoCore projectThis board would be able to run some flavor of Linux, and thanks to the modern GPU offloading multimedia operations, may be used for light multimedia purposes.
Packages Comarison Document - Page 1
Forum section: electronics / projects

author: ricko_uk
author_rank: Super Contributor
timestamp: March 12, 2020, 03:57:56 pm
content: Hi,where can I find a comprehensive list of packages for all discretes and ICs?The important thing is to have pictures and at least in scale to each others but ideally also dimentions (at least overall dimensions).I can find separate documentation/datasheets but I'm looking for a "collection" document or website.Many thanks
IC and Transistor ID Help - Page 1
Forum section: electronics / projects

author: Lani
author_rank: Newbie
timestamp: April 05, 2020, 10:14:15 am
content: Hi there all. Hope everyone is staying safe and healthy. I have just dug out some old stuff of mine and was wondering if any of you folks have any idea what these are. Google was no help really. I think the DM85L74 is a dual edge triggered D flip flop but cant find a datasheet for it. The TI part is maybe 128 bit read only memory? Again no info on the web that I can find so this is a guess. And the transistor is a NPN with a beta of 26. Any help would be greatly aprecciated. Hopefully the pictures are clear enough. Had to resize them and they lost alot of clarity. Stay safe everyone!!
ic-components.com - has anyone used them before? - Page 1
Forum section: electronics / projects

author: radar_macgyver
author_rank: Frequent Contributor
timestamp: November 03, 2021, 06:18:22 am
content: Trying to buy some microcontrollers, I got a quote from ic-components.com which was about 3x the normal price on DK/Mouser but they are one of the few places that have them. Has anyone else used them? Can they be trusted?This is for a project that's gone through a PCB rev and a fair bit of software work, so it's too late to switch CPUs.

author: commie
author_rank: Frequent Contributor
timestamp: November 04, 2021, 09:42:06 pm
content: Quote from: radar_macgyver on November 03, 2021, 06:18:22 amI did buy from China, Hong Kong inventory about 20 years ago and everything went well but I was stung with import duties/bank charges. Given the world at present, I wouldn't advise it.Beware of fake parts and many more scary things that could happen. If I were you, I would put my project on the back burner until new local stock becomes available.
IC Datasheet - Page 1
Forum section: electronics / projects

author: ElectricGuy
author_rank: Regular Contributor
timestamp: March 16, 2015, 02:00:49 pm
content: Hi;I've been searching for the IC on the photo, but i'm not having success. Does someone knows where to find it?Its from a VFD display board. This board works differently from the usually boards. Its custom made.Thank you!

author: amyk
author_rank: Super Contributor
timestamp: March 16, 2015, 03:07:08 pm
content: Rockwell 10937PNow made by Micrel as theMIC10937.

author: ElectricGuy
author_rank: Regular Contributor
timestamp: March 16, 2015, 07:28:02 pm
content: Quote from: amyk on March 16, 2015, 03:07:08 pmThank you amyk.
IC for power supply source selector switch needed - Page 1
Forum section: electronics / projects

author: UHF
author_rank: Contributor
timestamp: June 07, 2023, 02:20:05 am
content: Hello, I don't know the name of this type of IC. I want to have two power supply sources at 5VDC 500mA. One source is internal (USB) and the other external from a power adapter. I want the internal to be cut off and the external to supply power when applied (5V detected from it perhaps.) Is there a name for this type of IC like a power selector? I can find battery backup ICs but not this type. I considered a barrel connector with a switch - this kind of thinghttps://www.edaboard.com/attachments/dcjack-png.168949/but it cuts off ground not 5V and I don't want centre-pin negative nonsense. Thanks.

author: mariush
author_rank: Super Contributor
timestamp: June 07, 2023, 04:15:02 am
content: There's ideal diode controllers like LM66200 which automatically switch between 2 sources, giving priority to the highest voltage :https://www.ti.com/lit/ds/symlink/lm66200.pdfYou could add a diode in series with the internal voltage and that would lower it the internal voltage a bit below 5v, so when you insert the external 5v it would switch to that.You can use a single ideal diodes like LM66100 and a p-channel mosfet to auto switch, without using a diode , see page 12 :https://www.ti.com/lit/ds/symlink/lm66100.pdfMAX40200 is another ideal diode :https://www.analog.com/media/en/technical-documentation/data-sheets/MAX40200.pdfCould use it similarly ... have it on internal 5v with a diode before it to reduce the voltage a bit so that when you put external 5v the ideal diode will block lower internal voltage, or you could use it on external input along with a p-channel mosfet to disable internal voltage.There are also chips that can switch between multiple inputs automatically but typically have limitations or are more expensive .Look for example at TPS211, TPS2110, TPS2114, TPS2115 :TPS2110/TPS2111 :https://www.ti.com/lit/ds/symlink/tps2110a.pdfTPS2114/TPS2115 :https://www.ti.com/lit/ds/symlink/tps2114a.pdf2115 is $2.65 if you buy just one on Digikey, while a LM66100 is maybe 40 cents and a p-channel mosfet is maybe 10-20 cents.tps2113 is around $2https://www.ti.com/lit/ds/symlink/tps2113a.pdfFPF3040 is cheaper at around 1.2$ on Digikey and does the same job but higher pin count chip and harder to use (bga balls) :https://www.onsemi.com/pdf/datasheet/fpf3040-d.pdfCheaper stuff, for example TPS22933 has 3 inputs and a built in 3.6v linear regulator and automatically switches between the input with the highest voltage. Downside is the output is maximum 50mA

author: UHF
author_rank: Contributor
timestamp: June 07, 2023, 04:53:49 am
content: Thanks very much. They seem to be called Source Selector Switches / OR controllers. TPS2110A looks about right, a bit expensive but I'm not making many of these. Thanks.
IC for voice command - Page 1
Forum section: electronics / projects

author: Tricka90
author_rank: Regular Contributor
timestamp: October 31, 2014, 08:10:16 am
content: Some years ago I found an IC for voice commands but I can't find it anymore.It worked this way: first you record an audio sample, like a secret word, and the IC will save it on his memory. Then the IC will recognize the secret word every time you pronunce it because it will compare the audio samples.Can you guess the IC name?

author: bktemp
author_rank: Super Contributor
timestamp: October 31, 2014, 09:23:55 am
content: VD364 fromhttp://www.sensoryinc.com/?
IC HL0211 - SO14 what's that? Datasheet/AppNote please - Page 1
Forum section: electronics / projects

author: Rafiki
author_rank: Contributor
timestamp: May 10, 2024, 02:57:28 pm
content: Hope this is the proper category for my question.I'm searching for information on this IC. It's in a sine wave output power converter. DC 12V to 230V~, 350W, Dometic DSP 412, Made in China. I guess it controls the output transistors which forms the sine wave 230V~ from the intermediate high voltage DC.What I want is some information about the circuit to change it for producing little bit lower output voltage. 210V~ instead 230V~ would be fine.

author: coromonadalix
author_rank: Super Contributor
timestamp: May 10, 2024, 03:19:19 pm
content: photos would help but could be a custom design ...

author: Rafiki
author_rank: Contributor
timestamp: May 10, 2024, 06:49:39 pm
content: Hope this helps.
IC identification button multiplexer R3110 (solved) - Page 1
Forum section: electronics / projects

author: sahko123
author_rank: Frequent Contributor
timestamp: January 09, 2023, 02:53:42 pm
content: I have a wireless mouse I'm reverse engineering and I've gotten most of the ics worked out.The last IC is pictured below and is marked R3110 and I believe it is a button multiplexer but I'm unable to find the exact chip. It's a 20 pin qfn.Any help would be appreciated.

author: gamalot
author_rank: Super Contributor
timestamp: January 09, 2023, 03:25:19 pm
content: SN3199I320Ehttps://www.electronicsdatasheets.com/manufacturers/sien-technology/parts/sn3199i320e
IC identification for isolated  dc dc Power supply - Page 1
Forum section: electronics / projects

author: electronx
author_rank: Regular Contributor
timestamp: August 26, 2024, 12:52:05 pm
content: I want to identify 3 integrated circuits on the mornsun ura2415s-6wr3 and find their datasheets.NCE P0120Q 1XQQ11103C H2its look like opto isolator icGA 232 0R 3HWhat topology do these types of isolated dc dc supplies generally use? Any knowledge?

author: squadchannel
author_rank: Frequent Contributor
timestamp: August 26, 2024, 01:01:29 pm
content: P0120Q = NCEP0120Q1103C =CL1103? but different package(sop-8 not tsop)...CL1103 would be different since it has an internal FET.GA 232 = OR3H7 with many clones.I think it is a simple "flyback" topology.
IC identification for sony led driver board - Page 1
Forum section: electronics / projects

author: electronx
author_rank: Regular Contributor
timestamp: August 17, 2024, 11:36:07 am
content: I want to identify 3 integrated circuits on the Sony LED driver card and find their datasheets.4 integrated AN37011B, these are most likely LED driver integrated circuits. But I couldn't find the datasheet.sn358 (maybe KODENSHI_AUK CORP.)(maybe lm358 dual opamp ?)3213 ?

author: electronx
author_rank: Regular Contributor
timestamp: August 18, 2024, 07:39:13 pm
content: https://datasheet.octopart.com/DB2S311-Panasonic-datasheet-15943195.pdf
IC marking on TLV07 from Mouser - Page 1
Forum section: electronics / projects

author: deepfryed
author_rank: Unknown
timestamp: December 02, 2023, 12:15:43 am
content: I purchased some TLV07s from Mouser last month and just took them out to use them. I haven't used them before, but found it weird that they have no TI marking on them. Look like generic ebay / Aliexpress knockoffs. OP07s which I have used, do have the TI logo marking as expected.Do TI publish what ICs should look like ? I would assume that Mouser only stock genuine parts, but one can't be 100% certain even with established distributors

author: ArdWar
author_rank: Frequent Contributor
timestamp: December 02, 2023, 12:26:41 am
content: Quote from: deepfryed on December 02, 2023, 12:15:43 amNormally not, and they often won't guarantee it since the same product can be packaged and marked at multiple production sites.But you can often find production changes like this in therelevant PCN

author: deepfryed
author_rank: Unknown
timestamp: December 02, 2023, 12:34:48 am
content: Thanks, they do list TLV07 in the PCN. Cost saving I presume ?I'm not sure if it really "standarizes" markings ...

author: deepfryed
author_rank: Unknown
timestamp: December 02, 2023, 12:40:19 am
content: Interesting the Mouser PCN does not have the part listed (TLV07IDR), reckon it's an oversight ?https://www.mouser.com/PCN/Texas_Instruments_PCN20211123004_2022022410013610.pdf
IC Model - Page 1
Forum section: electronics / projects

author: Unknown
author_rank: Unknown
timestamp: February 10, 2010, 07:12:41 am
content: dear all..right now, I want to design an Up Converter schematic with IC using agilent and eagle , but I have a problem because I can not find IC with spec I need in this software.Can you help me to make IC Model or footprint in that software???thanks...

author: armandas
author_rank: Frequent Contributor
timestamp: February 10, 2010, 05:41:55 pm
content: There is an instructable on creating parts in eagle:http://www.instructables.com/id/How-to-make-a-custom-library-part-in-Eagle-CAD-too/

author: Unknown
author_rank: Unknown
timestamp: February 12, 2010, 05:28:46 am
content: Quote from: armandas on February 10, 2010, 05:41:55 pmthanks, it may help me a lot...
IC package/footprint cross reference - Page 1
Forum section: electronics / projects

author: ajb
author_rank: Super Contributor
timestamp: October 01, 2014, 04:15:52 am
content: This is driving me crazy. A few weeks ago I stumbled across a website that had an extensive cross reference of IPC/JEDEC/EITA footprint designations along with a lot of the bastardized/homegrown names various manufacturers use for otherwise standard footprints. This would be immensely helpful as I attempt to clean up my Altium libraries (and just to have in general), but I'll be buggered if I can find it again. Anyone by chance have anything like that?

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: October 01, 2014, 05:20:52 am
content: Maybe the PCB libraries LP Viewer 5.00 from the IPC can help.http://landpatterns.ipc.org/default.aspwhich used to be free (PCBL_LP_V5_Viewer_Setup.exe) but now seems to payware, since it moved herehttp://www.pcblibraries.com/It's from 8 years ago though. If you can still find the free version.
IC reference - Page 1
Forum section: electronics / projects

author: yalect
author_rank: Regular Contributor
timestamp: March 02, 2020, 08:05:04 pm
content: Hi,I would like to ask you about the reference of this IC (Picture attached) supposed EUP 9863 or 9863Thank you

author: amyk
author_rank: Super Contributor
timestamp: March 03, 2020, 02:54:38 am
content: EUP9863 1*7W single channel F-class audio amp.

author: yalect
author_rank: Regular Contributor
timestamp: March 04, 2020, 09:15:57 am
content: thank youwhere can I find its Datasheet or kindly provide it?Greeting
IC Semiconductor Manufacturer logo symbol - Page 1
Forum section: electronics / projects

author: nukie
author_rank: Frequent Contributor
timestamp: August 24, 2011, 06:37:12 am
content: While doing some reverse engineering work today, I found a few helpful websites, this is a good one.http://www.westfloridacomponents.com/mm5/graphics/manufacturer-logos.pdf

author: bairdbankovic
author_rank: Newbie
timestamp: December 25, 2024, 11:40:46 pm
content: The link is broken, I have an de-caped IC and I was looking to identify the logo. Do you by chance have a new link?

author: amyk
author_rank: Super Contributor
timestamp: December 26, 2024, 08:22:06 am
content: Post a picture of it here and you may get an immediate response...Otherwise these sites may help:http://www.ecadata.de/herst/myshowlogo.php?F_SPRACHE=2https://rtellason.com/semiconductorlogos.html

author: I wanted a rude username
author_rank: Frequent Contributor
timestamp: December 26, 2024, 06:21:41 pm
content: Quote from: bairdbankovic on December 25, 2024, 11:40:46 pmToday's your lucky day, because you get to find out aboutthe Internet Archiveand its hundred billion page snapshots!Here's a relevant one for nukie's link:https://web.archive.org/web/20150612050801/https://www.westfloridacomponents.com/mm5/graphics/manufacturer-logos.pdf

author: Terry Bites
author_rank: Super Contributor
timestamp: December 28, 2024, 02:54:00 pm
content: I took an image from a logo site and made myself a Telefunken tee-shirt back in the day. I thought it was a cool that I edited it to Telefunkin.What a wanker I was!
IC Tester (Very Programmable) Renegade-i - Page 1
Forum section: electronics / projects

author: VacuumTube
author_rank: Newbie
timestamp: February 12, 2017, 11:42:12 pm
content: Hi semicon Test Engineers!I've recently completed the biggest project of my life - a semicon device tester. You can view it instructables :https://www.instructables.com/id/Renegade-i-Programmable-IC-Tester-That-Feels-Like-/At the moment, it can only do functional test of a digital device.This is how it works: (if you are a test engineer, you may skip these elaborations)You program the tester by writing a test pattern in a text file, for example: below is the test pattern for 74LS00 nAND device://nAND test pattern@VECTORMAP( 1A,1B,1Y, 2A,2B,2Y, 3A,3B,3Y, 4A,4B,4Y).@ VEC 0 0 H 0 0 H 0 0 H 0 0 H. TSET0. FUNCSET0.@ VEC 0 1 H 1 0 H 0 1 H 1 0 H. TSET0. FUNCSET0.@ VEC 1 0 H 1 0 H 0 1 H 0 1 H. TSET0. FUNCSET0.@ VEC 1 1 L 1 1 L 1 1 L 1 1 L. TSET0. FUNCSET0.You start by declaring a VECTORMAP which specify which symbol(0,1,L,H) goes to which pin, the arguments are pin names.You compile the test pattern, then run a test program using the compiled pattern.for an AND device, you write://AND test pattern@VECTORMAP( 1A,1B,1Y, 2A,2B,2Y, 3A,3B,3Y, 4A,4B,4Y).@ VEC 0 0 L 0 0 L 0 0 L 0 0 L. TSET0. FUNCSET0.@ VEC 0 1 L 1 0 L 0 1 L 1 0 L. TSET0. FUNCSET0.@ VEC 1 0 L 1 0 L 0 1 L 0 1 L. TSET0. FUNCSET0.@ VEC 1 1 H 1 1 H 1 1 H 1 1 H. TSET0. FUNCSET0.it follows that for a NOR device, the pattern will look like://nOR test pattern@VECTORMAP( 1A,1B,1Y, 2A,2B,2Y, 3A,3B,3Y, 4A,4B,4Y).@ VEC 0 0 H 0 0 H 0 0 H 0 0 H. TSET0. FUNCSET0.@ VEC 0 1 L 1 0 L 0 1 L 1 0 L. TSET0. FUNCSET0.@ VEC 1 0 L 1 0 L 0 1 L 0 1 L. TSET0. FUNCSET0.@ VEC 1 1 L 1 1 L 1 1 L 1 1 L. TSET0. FUNCSET0.You can also read some news about the project:http://www.live-news-today.com/2017/01/29/renegade-i-programmable-ic-tester-that-feels-like-the-real-thing-674899https://www.follownews.com/renegadei-programmable-ic-tester-that-feels-like-the-real-thing-2gmhhhttps://psdtoblog.wordpress.com/2017/01/28/renegade-i-programmable-ic-tester-that-feels-like-the-real-thing/I am planning to use a VENUS chip by Intersil (or similar) to drive the tester channels.When that happens, this project can be used as a production tester.happy testing,Rene I. Gade

author: martinator
author_rank: Contributor
timestamp: February 13, 2017, 03:52:20 am
content: Cool. How are you detecting shorts/illegal setup states and overcurrent?

author: VacuumTube
author_rank: Newbie
timestamp: February 13, 2017, 09:13:46 am
content: Thanks for the cool comment, shorts/opens/leakage and other DC tests requires a PMU (Parametric Measurement Unit).This current version don't have the PMU yet. It will be included in the future revisions. Stay tuned.
IC that generates HDMI signal from external RAM or data from SPI - Page 1
Forum section: electronics / projects

author: StjepanV
author_rank: Newbie
timestamp: August 23, 2018, 01:22:50 pm
content: Hi guys/gals,Do you know of a type of products that would generate HDMI signal from a bitmap in the external RAM or internal RAM that was previously filled using SPI/I2C?I'm trying to avoid the use of FPGA if possible for that purpose.Many thanks!Stjepan

author: T3sl4co1l
author_rank: Super Contributor
timestamp: August 24, 2018, 12:37:12 am
content: I'm not seeing any controllers for SPI interface, HDMI output. Plenty for LCD, even one for analog video. Maybe you can pair one with a <video>-to-HDMI converter chip?It's not going to be pretty, in terms of draw speed.Tim

author: StjepanV
author_rank: Newbie
timestamp: August 24, 2018, 08:42:34 am
content: Thx Tim! Yeah, I've searched far and wide. It's seems that FPGA will be the approach
IC to read the output frequency of an oscillator for calibration over i2c or spi - Page 1
Forum section: electronics / projects

author: digitalsignals5
author_rank: Newbie
timestamp: September 24, 2020, 03:02:35 am
content: Hello,I am looking for an IC that can read the output frequency of an oscillator range 0.15Mhz-3Mhz with 18.75kHz accuracy over i2c or SPI. I am using this chip to automate the oscillator frequency. Any ideas?Thanks in advance!

author: ataradov
author_rank: Super Contributor
timestamp: September 24, 2020, 04:39:01 am
content: A simple MCU would probably be the best option. $1 MCU would do the trick, but would require some programming, of course.

author: ledtester
author_rank: Super Contributor
timestamp: September 24, 2020, 04:56:18 am
content: For an example of how to measure frequency with a microcontroller, just search for "arduino frequency counter", e.g.:https://github.com/PaulStoffregen/FreqCount
IC vendor suitability - Page 1
Forum section: electronics / projects

author: baxev2005
author_rank: Newbie
timestamp: October 21, 2016, 10:38:05 am
content: I want to reproduce an HF RF power meter, which uses Analog Devices AD8302 Gain and Phase Detector. Some ebay vendors from china sell this chip for 6.96UKP / 10pcs, while RS in UK sells for 16.27 UKP apiece. Price difference is way too big!!!!. Does anybody have experience about the quality of chinese chips and whether it is resonably safe to buy this staff from ebay??? Thanks in advance

author: CM800
author_rank: Frequent Contributor
timestamp: October 21, 2016, 10:46:34 am
content: Quote from: baxev2005 on October 21, 2016, 10:38:05 amI wouldn't say it's safe to buy them there at all, they will likely be fakes or taken off old peices of equipment / scrap components.

author: JPortici
author_rank: Super Contributor
timestamp: October 21, 2016, 10:48:40 am
content: if it costs less than the manufacturer's bulk price..

author: hans
author_rank: Super Contributor
timestamp: October 21, 2016, 11:00:25 am
content: http://www.analog.com/en/products/rf-microwave/rf-power-detectors/non-rms-responding-detector/ad8302.html#product-samplebuySo they ebay ones are cheaper? Probable options:- Fallen of a truck.- Quality control discarded them because someone sneezed in the IC factory.- They are counterfeit (not sure how probable that is for such a niche IC).- Scrapped from old equipment- A company went bust that had thousands of these in stock, someone got them really cheap and are now dumped on Ebay for a quick buck.
ICE40HX1K-STICK FPGA and DWM1000 UWB - Page 1
Forum section: electronics / projects

author: borayau
author_rank: Newbie
timestamp: January 26, 2024, 05:44:27 pm
content: Hello guys. We have project that we need to use DWM1000 UWB module with this fpgahttps://fevaris.com/kitler/ice40hx1k-stick-evn-lattice-fpga-gelistirme-kitiwe need to know can we find open-source examples DWM1000 and FPGA implementation. If you know or have please share with me. Thanks a lot

author: berke
author_rank: Frequent Contributor
timestamp: January 26, 2024, 05:57:05 pm
content: Just had a look at the DW1000 user manual, it seems a bit complicated to directly drive from RTL logic, and I think the 1K device might be a bit too small for that.What you could do is use a larger device, HX8K or UP3K/UP5K and instantiate a softcore AVR on which you can run readily available DW1000 code, and that should leave you enough resources to whatever you can't do easily in software.
ICEedge ICC1 Controller and ICC3 Gate Driver Datasheets? - Page 1
Forum section: electronics / projects

author: Chris56000
author_rank: Frequent Contributor
timestamp: March 02, 2023, 02:19:02 am
content: Hi!ICEpower say in several items of their corporate bilge, that "Our ICEedge chipset is in use by numerous other amplifier board manufacturers as well as ourselves", if that's the case, are there any of the datasheets/pinouts for the ICC1 Controller and ICC3 Gate Driver ICs known to have been leaked out (or otherwise!) on the internet, or is that a trade secret?!It does puzzle me since the Chinese appear to have copied the 125ASX2 module as well as others no doubt, so they must have filched this information from somewhere, or do the Chinese Modules use other devices?I dare say I could buy one of these modules and make a guess at the chip pinouts, but somebody's obviously got hold of something, or are their devices a re–branding of something more common that they don't want anyone to find out what?(I read something about IR2092s being used in some of their products as well!)Chris Williams
ICircuit - Page 1
Forum section: electronics / projects

author: Cujo
author_rank: Regular Contributor
timestamp: September 23, 2019, 02:09:35 am
content: Do you think ICircuit is any good?https://www.microsoft.com/en-au/p/icircuit/9wzdncrdc280?rtc=1&activetab=pivot:overviewtab

author: amspire
author_rank: Super Contributor
timestamp: September 23, 2019, 02:52:51 am
content: It is worth a try for demo use, and it doesn't look like a bad way to learn about resistors, capacitors and inductors. The device library looks very limited and simplified, and I couldn't see any obvious way to add components. For the price, it is not a bad learning program.In the longer term, you are probably going to go further with LTSpice (https://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html) , or one of the open source Spice applications like QUCS (https://ra3xdh.github.io).SPICE is the component simulation method developed back in the 1960's and it has basically been the standard since.
ICM7555 and really low frequency - Page 1
Forum section: electronics / projects

author: Jester
author_rank: Frequent Contributor
timestamp: April 10, 2019, 09:44:33 pm
content: Playing around with a ICM7555 variety of the 555 timer, datasheet advertises delays from us to hours. This version has much lower input currents so in theory, larger resistors can be used compared to the original 555's.If you use a large value resistor > 1Mand a large "leaky" electrolytic capacitor I suppose you might get something to work beyond say 60 minutes. I would guess that the timing would vary a fair bit over time and temperature though because the capacitor leakage current would have a significant impact on the timing.The datasheet shows R value as high as 100M, I'm not sure how practical that is for real world use with eventual contamination on the board etc? I did a reality check with a 4.7Mand, 47uF Tantalum and that yields about 16 minutes in astable mode, however with a 10Mand the same capacitor it never timed out.Assuming using a divider is not an option, has anyone been able to generate long time periods and or really low frequencies without an electrolytic?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: April 10, 2019, 10:32:22 pm
content: Ceramics may have lower leakage, but it is hard to find large values, and leakage may not be very good by then. The highest C*Rleak capacitors I'm aware of are wet-slug tantalum. But they're quite expensive. I would much rather buy a reel of CD4040s.Tim

author: Jester
author_rank: Frequent Contributor
timestamp: April 10, 2019, 11:28:25 pm
content: Quote from: T3sl4co1l on April 10, 2019, 10:32:22 pmOr use the fancy LT part, small and no capacitor required LTC6995CS6-1#TRMPBF

author: Zero999
author_rank: Super Contributor
timestamp: April 11, 2019, 08:18:20 am
content: The hours is marketing wank.The 4060 has a built-in oscillator and a counter.Also look at the 74HC5555 and 4536.

author: duak
author_rank: Super Contributor
timestamp: April 11, 2019, 04:50:11 pm
content: Well, a 100 M resistor and a 10 uF film cap give a time constant of 1000 seconds so if the chip lives up to its specs it should work. The board would have to be dead clean and a few guard traces to intercept stray currents might be needed. I suppose if you make CMOS device, why not tout its low bias current inputs even if the overall concept may be difficult to use?Wavetek (and probably others) use capacitance multipliers in their analog function generators to extend the low frequency ranges without using electrolytics. Here's one for the 555:https://forum.allaboutcircuits.com/threads/trying-to-apply-capacitance-multiplier.128372/
iCredit 500 smart meter LED sensor - Page 1
Forum section: electronics / projects

author: electroguy
author_rank: Regular Contributor
timestamp: July 24, 2012, 11:25:21 pm
content: Hi,www.meterdisplay.com.auhave a DIY sensor that you can use to interface into your project if you want to measure the power from the iCredit 500 smart meter. I used one to build my own power logger. Had to cover up the top and sides of the meter to stop light getting in, but with a bit of blu tac it works great.Just beware the iCredit LED flashes at 3200/kwh, i did a typo in my software (accidentally used 3600) and took me ages to find it, until i went and had another look at my meter and i saw 3200! doh!They also have a ready made POWER500 meter display unit for those that just want to display power only and don't want to make their own!
ICs getting addicted to higher voltages? - Page 1
Forum section: electronics / projects

author: Artlav
author_rank: Frequent Contributor
timestamp: September 12, 2014, 11:03:04 pm
content: What happens when a 3.3V device/IC is ran at 4-5V?I had two cases like that.One was a camera with an external power supply that was supposed to be 3.3V being used with a 4.2V supply.It ran fine for a while, but after some time it stopped working with batteries, and won't start from anything too far below 4V.In another case, i ran a 3.3V IC at 4V (thinking it was a 3-5V version).I noticed after a few days of that, and got it down to 3.3V.It kept on working, however it won't accept I2C input signals at 3.3V any more.4V I2C works, however, even with 3.3V supply.It seems that ICs are getting addicted to high voltage, once they tasted it.Question is - how does it work?I would have expected a gate breakdown somewhere, or internal resistors overheating, or something else that is followed by smoke.

author: ConKbot
author_rank: Super Contributor
timestamp: September 13, 2014, 01:31:40 am
content: Well at least you have better luck then my co-worker who was doing a project with an op-amp at home."It works at first but then the op amp stops working"'Whats your supply voltage?'"12v.." measures it, and the meter shows 12.1v "see?"'The absolute max in the datasheet says 12.0v and youre feeding it 12.1, and youre wondering why its dying?'"Yeah, its not that far over..."'Just put a diode on the power line and it will bring it down and it'll be fine'"ok"

author: bktemp
author_rank: Super Contributor
timestamp: September 13, 2014, 05:39:15 am
content: Quote from: Artlav on September 12, 2014, 11:03:04 pmIf the IC runs at a higher voltage for some time and it does not break down, it can change its electrical characteristics. I think this comes from some electrons getting trapped somewhere in the internal transistors and changing their threashold voltages.

author: amyk
author_rank: Super Contributor
timestamp: September 13, 2014, 12:32:51 pm
content: The PC overclocking community has known about this effect for a long time - CPUs that were overvolted and overclocked for some time stop working at stock speeds and voltages, and on some of them the voltage required to keep it working goes up with time. I believe it's been attributed to electromigration.

author: timb
author_rank: Super Contributor
timestamp: September 13, 2014, 11:50:09 pm
content: Quote from: SArepairman on September 13, 2014, 09:44:09 pmPush it to the lemons! Walk along the grazers edge, don't look sour or you're finished! Open up the lemons! Past the point of no refunds; ohhhh yeah! Welcome to the lemons!Sent from my Smartphone
ICSP and Floating Pins - Page 1
Forum section: electronics / projects

author: Gizmo
author_rank: Regular Contributor
timestamp: November 11, 2014, 10:21:00 am
content: I've been sorting out general teething problems and getting used to SMT construction. One thing which I have to do now is program my PIC's via ICSP rather than programming them outside the circuit and adding them in as I'm using QFP.Now if I have multiple chips driving the same output lines, the CE and OE will be floating if connected to the PIC chip in an un-programmed state, so potentially having multiple chips driving the same lines when the board is powered for programming. Is it normal practice to have pull-ups on CE in the case of using ICSP for this reason?

author: Andy Watson
author_rank: Super Contributor
timestamp: November 11, 2014, 10:50:42 am
content: It's generally a good idea to tie floating inputs to an inactive state. Don't forget the floating gates of the power-mosfets. The floating condition also applies when the PIC is in reset. Take note of any low-voltage programming pins on the PIC (RB3 - I think). These are not needed for normal programming via the ICSP, but it cannot be allowed to float during the programming.Edit: It's also a good idea to tie unused cmos inputs to a defined state.
ICSP questions - Page 1
Forum section: electronics / projects

author: anishkgt
author_rank: Frequent Contributor
timestamp: October 19, 2017, 02:35:14 pm
content: Hi All,I am trying to add the ATmega16U2 to my project for communication via USB. I am in doubt if i should have the ISCP header for the USB and the ATmega328 as well. I was thinking of the using the FTDI interface but the atmel was cheaper so went with that. The arduino schematic(https://www.arduino.cc/en/uploads/Main/Arduino_Uno_Rev3-schematic.pdf) uses two sets of these headers one for the ATmega328 and the Atmel16U2.Question:Should i be using for both or just from the ATmega would be ok. What is the reason for having at the USB side as well ?
ID for 9A7 SMD device - PLL frequency multiplier? - Page 1
Forum section: electronics / projects

author: Scratch.HTF
author_rank: Regular Contributor
timestamp: September 25, 2018, 02:53:55 am
content: I'm currently seeking identification of a SMD device in a SOT-363 package, marking 9A7 (with two lowercase letters), and it appears to be a PLL frequency multiplier which is used in an RF generator (no model number).The pinout is (Digital Selects most likely set the output multiplier):1 (dot): Clock IN (26 MHz in this unit)2: GND3: Digital Select 14: Digital Select 25: Clock OUT6: Vcc (+3.3V)
ID the manufacturer of inductor - Page 1
Forum section: electronics / projects

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: June 28, 2024, 01:51:38 am
content: I opened up a 1982 disk drive (a Commodore 1540) and noticed inductors in an unusual case style. Blue blocks with no markings and none of the several service manuals I have mention a manufacturer. They do for the 1541 and 1541-II but AFAIK none of those have this style of inductor.Those inductors in all other such drives I've seen over the decades all come in the usual blue blob with color dots, as seen also in other electronics of the era, like TVs.They're not broken or anything, I'm just a huge nerd and I need to know such things.
Id theses parts - Page 1
Forum section: electronics / projects

author: coromonadalix
author_rank: Super Contributor
timestamp: April 08, 2021, 07:04:28 pm
content: Hi just found this in old drawers, can't figure out the logo ??thks

author: phil from seattle
author_rank: Super Contributor
timestamp: April 08, 2021, 10:10:58 pm
content: Date code 1972? CerDip is pretty ancient.

author: Gyro
author_rank: Super Contributor
timestamp: April 09, 2021, 08:25:54 am
content: It doesn't look quite like I remember but it might be an earlier logo. AMI?That part number looks more like some company's internal stock code.

author: coromonadalix
author_rank: Super Contributor
timestamp: April 09, 2021, 10:24:56 am
content: I'll try to get a cleaner picture today, searched thru vintage logo databasesThe first letter : is it an AThe last letter : seems an "i"here's the zoomed pictures .... maybe too much loll
ID this connector? - Page 1
Forum section: electronics / projects

author: Corporate666
author_rank: Unknown
timestamp: October 19, 2017, 08:02:43 pm
content: The connector shown is used on a BMW motorcycle to connect the rear wiring harness to the front harness.It has no markings on it anywhere - I checked thoroughly under a microscope.I am looking to get some of these... maybe BMW is OEM'ing their own connectors? But I would imagine they buy them from someone... just can't find this one anywhere. Anyone recofnize it?

author: KMoffett
author_rank: Regular Contributor
timestamp: October 20, 2017, 02:24:06 pm
content: What does the mating connector look like? (Photo)Ken

author: Corporate666
author_rank: Unknown
timestamp: October 24, 2017, 05:56:40 pm
content: I don't have a picture of the mating part (yet). However I was able to find a source for these connectors. I sent it over to a cable supplier I use and they immediately said they know the connector and can supply them to me.From what I've been able to find, it is actually a proprietary BMW part and they do not sell them individually, only as part of a wiring harness. The connectors they do sell (for repairing wiring harnesses) have exorbitant prices - like $35 for a single 4 position connector (although with housing, terminals and seals). So I believe any of these that are for sale are just knock-offs of the real part... probably why they don't have markings on them.
ID this device please: ACUMOS 7005-105 48pin DIP  - Page 1
Forum section: electronics / projects

author: peteb2
author_rank: Regular Contributor
timestamp: January 21, 2018, 07:19:23 pm
content: Apologies if i'm posting in the wrong place. In a mountain of parts consigned for landfill (but too good not to just throw out for the inveterate hoarder) i've discovered a few of these. My attempts at Google searches have revealed component sales businesses offering such a code but not in a DIP package and less than nothing else. I am thinking it could be an ASIC of the era... maybe not. I've no idea what they were for, did or what they could do now or who Acumos is/was or became.Someone may recall Acumos and this device. All i know is that it could be a spare to video equipment as this is all i've been given. In the very least a mystery solved would be great let alone ever finding a home for them or making them my next retro project...

author: Wimberleytech
author_rank: Super Contributor
timestamp: January 21, 2018, 09:23:21 pm
content: http://articles.latimes.com/1992-04-11/business/fi-195_1_cirrus-logic-incI knew I had heard of them. Still not sure what chip that is, however. I will keep digging.

author: Wimberleytech
author_rank: Super Contributor
timestamp: January 21, 2018, 09:26:49 pm
content: If you are desperate to know. Go to linkedin and search Acumos. Pick a candidate and send inMail.Douglas Bartek was the CEO. I knew Doug but he might not remember me.

author: amyk
author_rank: Super Contributor
timestamp: January 21, 2018, 11:03:04 pm
content: http://www2.ic37.com/pdf/pdf_download.asp?id=1357616_785600Transistor arrays, so essentially ASICs.

author: Wimberleytech
author_rank: Super Contributor
timestamp: January 21, 2018, 11:22:13 pm
content: Quote from: amyk on January 21, 2018, 11:03:04 pmNice find.LOL...gate arrays...time warp for me.
ID this Part? - Page 1
Forum section: electronics / projects

author: isaacsbees
author_rank: Newbie
timestamp: June 02, 2016, 07:42:53 pm
content: Maybe a switch of some sort?Sent from my SM-G920V using Tapatalk

author: SaabFAN
author_rank: Frequent Contributor
timestamp: June 02, 2016, 08:20:02 pm
content: Rotary encoder maybe?

author: ataradov
author_rank: Super Contributor
timestamp: June 02, 2016, 08:32:17 pm
content: Do you have less blurry pictures? Some gas sensors look like this, for example.

author: danadak
author_rank: Super Contributor
timestamp: June 02, 2016, 08:52:52 pm
content: Pressure Transducer ? Bridge based.Regards, Dana.

author: PA0PBZ
author_rank: Super Contributor
timestamp: June 03, 2016, 09:39:27 am
content: Looks like a switch to me, you can move the black arm up or down. Can't see from the picture if it jumps back to the rest position automatically.
ID this plug? - Page 1
Forum section: electronics / projects

author: glentek
author_rank: Regular Contributor
timestamp: July 10, 2019, 11:56:18 pm
content: Can someone ID this plug? Flat pins about 1 x 0.3, shell is 20.5 x 12.5 for 14 pin dual row.No meaning full markings, just JH. It is used in a caravan hot water system.Thanks

author: coromonadalix
author_rank: Super Contributor
timestamp: July 11, 2019, 02:11:40 am
content: they seem to be din plug used in cars radio, maybe some non genuine plugs, see if you have an car radio shop nearby ?
ID27 Philips (former) Belgium Stepper motor 48 steps 7'30 need any specification - Page 1
Forum section: electronics / projects

author: Krzysztof Szymiczek
author_rank: Newbie
timestamp: July 12, 2013, 08:57:41 pm
content: Hi; I'm looking for any specs for those motors. Especially the nM torque, etc...I know how to drive it, that's no problem for now. Only the mechanical specs...anyone has something like this?

author: Paul Price
author_rank: Super Contributor
timestamp: July 12, 2013, 11:37:27 pm
content: Apply the correct drive voltage and current and make a torque measurement to see what newton-meters you get.
IDC header gender changer - Page 1
Forum section: electronics / projects

author: kuon
author_rank: Regular Contributor
timestamp: July 30, 2022, 04:06:19 pm
content: I am looking for something very simple, but for some reason I could not find anything.I have some boards with male 2.54 pin headers, like the GPIO header on the raspberry pi. And I'd like to stack them.I am looking for female to female adapter, but I must be looking in the wrong category because after 1h I can't find anything.To put it simply, the inverse of that:https://www.digikey.ch/en/products/detail/te-connectivity-amp-connectors/1-87605-6/2275482I need 2 rows 40 pin 2.54mm, but it can be 2x 20pin if I can put them side by side.

author: spostma
author_rank: Regular Contributor
timestamp: July 30, 2022, 05:25:09 pm
content: Female/Female could be made with a small PCB and two SMT Female connectors.Male/Female does exist for stacking boards as you will know

author: kuon
author_rank: Regular Contributor
timestamp: July 30, 2022, 11:13:52 pm
content: I thought of the small PCB, but I'll keep that of small resort.

author: langwadt
author_rank: Super Contributor
timestamp: July 31, 2022, 02:21:28 am
content: one-of or production?if one-of just solder two females together

author: kuon
author_rank: Regular Contributor
timestamp: July 31, 2022, 02:25:18 am
content: Quote from: langwadt on July 31, 2022, 02:21:28 amTwo, I soldered the connectors on the wrong side from my prototypes.Your idea is brilliant, I'll just do that. I have low profile SMT headers lying around that should work.

author: tooki
author_rank: Super Contributor
timestamp: May 31, 2023, 03:46:44 pm
content: Why not just use two female IDC connectors on an extremely short piece of ribbon cable? That’s infinitely less work than soldering two 40p connectors together, and should be mechanically more robust since it can flex.

author: AndyBeez
author_rank: Frequent Contributor
timestamp: May 31, 2023, 04:08:18 pm
content: So pins 1-2 on the first male connector map directly inline to pins 1-2 on the second?Quote from: tooki on May 31, 2023, 03:46:44 pmWorks every time