hybridfree/eevblog-posts huggingface dataset:
Parellel EPROM working from 4V to 6.4V - Page 1
Forum section: electronics / projects

author: txescientist
author_rank: Regular Contributor
timestamp: March 04, 2014, 09:52:36 pm
content: Is there any parallel EPROM that works in 4-6.4 voltage range? Like CDP1802 can work. Is there any version of 27C64 with this operating voltage range?

author: peter-h
author_rank: Super Contributor
timestamp: March 04, 2014, 10:23:36 pm
content: Not much 5V logic will run at 6.4V. Well, it will probably run but it will be way over absolute max Vcc. Also with EPROMs you need to be careful because the programming algorithms use elevated voltages so 6.4V might upset it a bit.

author: txescientist
author_rank: Regular Contributor
timestamp: March 05, 2014, 01:22:40 pm
content: Thank you for replay. I have a device that is battery operated (4AA) and eprom is working fine, but datasheet says that operating voltage is 5V+-10%ROM is NMC27C16QE-45. So is it some wide voltage version or is it just regular EPROM? All roms that I saw, worked on 5V+-10%...
Parrot Test Clips - Page 1
Forum section: electronics / projects

author: saturation
author_rank: Super Contributor
timestamp: December 02, 2010, 03:02:51 pm
content: I've never heard or seen these in action, can anyone comment?I ran into this looking through a catalog. They claim better performance than minigrabbers or alligators.http://www.parrot-invent.com/store.htmYou don't get to see much innovation in test leads but this seems promising.

author: qno
author_rank: Frequent Contributor
timestamp: December 02, 2010, 03:28:33 pm
content: Hee thats nice.A test pin and hook all in one.Dave can you test it?

author: allanw
author_rank: Frequent Contributor
timestamp: December 02, 2010, 06:09:39 pm
content: Hmm, they have decently cheap Kelvin clips:http://www.parrot-invent.com/product_Parrot_Push_Kelvin_Probes.htm?product=Parrot_Push_Kelvin_ProbesWonder if they're any good?Why do they sell Kelvin clips in 4x leads and also this 2x lead one?

author: Unknown
author_rank: Unknown
timestamp: December 02, 2010, 08:06:32 pm
content: I've used them. The push Kelvin probes have two parallel pins (similar tothese Keithley ones), one is spring-loaded. Not very useful for measuring resistors, but useful for measuring eg. PCB trace resistance (assuming you can fit both tips on the trace somewhere). The tips are not sharp enough for my taste, and somewhat wobbly. The other set is just two pairs of regular clips.The large clips are pretty nice, although the 'tip' is not sharp enough for SMT, I would have preferred a fountain pen shape. The smaller clips have less holding power (shorter spring, probably same type of spring), so they sometimes have a hard time staying put. I had to add washers to some of them because the flange holding the spring back was not large enough. The washers also increased spring pressure. In the small clips (2mm I think) that I got, the banana jack was lousy (just a flat piece of copper to provide 'springiness', the larger ones have a proper copper cylinder). Banana leads with retractable sheath tend to launch the clips. Uninsulated banana plugs on leads hardly stay put (in proper banana jacks), the insulated ones are the opposite, I have to hold the equipment I put them in to with my other hand to prevent it from shifting due to the force required.I like the innovation, but the execution is definitely a step down from the brand-name stuff I'm used to (eg. Pomona, Hirschmann, Fluke).

author: saturation
author_rank: Super Contributor
timestamp: December 02, 2010, 11:34:57 pm
content: Thanks a bunch, alm, a most excellent review. If its a step down from Fluke and Pomona, that I know well, I think I'll pass for now.Quote from: alm on December 02, 2010, 08:06:32 pm
PART 2:  Module Connection box.  Design - Page 1
Forum section: electronics / projects

author: RJSV
author_rank: Super Contributor
timestamp: July 19, 2020, 05:02:21 pm
content: Using five salvaged toy circuit boards, there are lots of built-in functions, plus several audio sources.The key to keeping separate outputs from conflicting is to keep a stationary output BUS, while having selectors on the input portions. Proto-strip power runsare useful for a central BUS of 8 lines.So each 'channel' circuit can be dialed to select amoung signals but without accidently connecting two outputs. Five rotary selectors will configure the desired layout. An audio selector feeds an internal speaker.Viewing the box, it has a nylon shell cover. Upper corner has the expansion BUS line, with binding posts. Then, moving left to right are housed an LED Garage Light / Motion Detector, a pair of toggle latches, a toy singing and gesturing BIRD, and on the right side of box is a Barking DOG. You can view the little processor circuit board and speaker salvaged, in the second picture.Each channel input is assumed to trigger on a low-going pulse or small signal.
Part availability searching across different distributor websites? - Page 1
Forum section: electronics / projects

author: Fusion916
author_rank: Regular Contributor
timestamp: November 24, 2020, 07:53:06 pm
content: I'm trying to get more stock of a FPGA (LCMXO2-1200HC-6SG32I) but it's out of stock on both digikey and mouser. Digikey shows no lead time and mouser shows a lead time all the way to Dec 21st. Outside of digikey and mouser I don't know what sites are trusted to provide (legit, not fake) parts. Is there any recommended website/database here to search stock for different distributors that are trustworthy?

author: up8051
author_rank: Frequent Contributor
timestamp: November 24, 2020, 08:34:48 pm
content: www.octopart.comwww.findchips.comwww.chipfind.net

author: aiq25
author_rank: Regular Contributor
timestamp: November 24, 2020, 08:51:24 pm
content: We usewww.trustedparts.comat work.

author: Fusion916
author_rank: Regular Contributor
timestamp: November 24, 2020, 09:29:23 pm
content: Thanks for the links, but still doesn't look like it's in stock anywhere in the world (?)

author: tmadness
author_rank: Regular Contributor
timestamp: November 25, 2020, 06:24:46 am
content: https://www.mouser.com/ProductDetail/Lattice/LCMXO2-1200HC-6SG32I?qs=Zwj7mHVHPHRZ9Ypld65%252Btw%3D%3DMouser says it should be available by end of year
Part changes current consumption with hand approach or touch - Page 1
Forum section: electronics / projects

author: gaminn
author_rank: Frequent Contributor
timestamp: September 14, 2016, 10:20:36 am
content: Hi,I'm designing low power ADC converter using MAX11210. According to datasheet, their eval board and their technical support I made a minimal setup:AVDD = DVDD = CS = REFP = 3V3 (supplied by HP E3615A or 3V3 linear regulator supplied by USB port), decoupling cap on both AVDD and DVDDREFN = AINP = AINN = GNDIn this configuration the part should be in low power state consuming max. 4 uA. However I experience huge current fluctuations, mainly when I approach my hand to the part ot when I touch its pins with my finger. The current fluctuates between 0 to 350 uA.One special case is when I touch DVDD pin with my finger then the part consumes steady 2 uA which is correct sleep current.I have tested this with 4 chips.I have never experienced any part to change its Icc when I approach my hand or touch it by finger.I'm not beginner HW engineer but this time I'm really stuck... Hopefully someone can give an advice.

author: wraper
author_rank: Unknown
timestamp: September 14, 2016, 10:27:23 am
content: Most likely you left CMOS inputs floating.http://www.ti.com/lit/an/scba004d/scba004d.pdf

author: dmills
author_rank: Super Contributor
timestamp: September 14, 2016, 10:47:33 am
content: Somethings possibly honking, do you have any open circuit pins on the part?The proximity thing makes me think it is taking off somewhere up in the VHF, but the other thing that causes excess current consumption is cmos inputs left to float.The gotcha with this is GPIO pins which if floating should be set to output and driven one way or the other.Regards, Dan.

author: gaminn
author_rank: Frequent Contributor
timestamp: September 14, 2016, 10:52:53 am
content: Yes, floating pins... F*ck. I spent two days communicating with Maxim support whether there is a need to use pull ups/downs on some pins, the told NOThe problem was connected with GPIO1 - 4 pins and CLK pin which I don't use. Configuring GPIO pins to output and connecting CLK to GND or 3V3 solves my issue.Thanks
Part-DB: Open source inventory management software for electronic components - Page 1
Forum section: electronics / projects

author: jbtronics
author_rank: Contributor
timestamp: April 27, 2023, 01:20:57 pm
content: A few years ago I took over maintainership of some pretty old inventory managment software. Over the time a full rewrite of the old code happened, with modern code architecture, new features and many improvements, which I want to showcase a bit:Part-DB is an Open-Source (AGPL 3.0) inventory management system with a focus on electronic components (but can be used for other things too). It is installed on a web server and so can be accessed with any browser without the need to install additional software. GitHub repo:https://github.com/Part-DB/Part-DB-serverIf you want to try out Part-DB you can find a demo instance underhttps://part-db.herokuapp.comFeatures include:Inventory management of your electronic parts. Each part can be assigned to a category, footprint, manufacturer and multiple store locations and price information. Parts can be grouped using tags. You can associate various files like datasheets or pictures with the parts.Multi-Language supportBarcodes/Labels generator for parts and storage locations, scan barcodes via webcam using the builtin barcode scannerUser system with groups and detailed (fine granular) permissions. Two-factor authentication is supported (Google Authenticator and Webauthn/U2F keys) and can be enforced for groups. Password reset via email can be setuped; SAML supportImport/Export systemMigrate an existing PartKeepr database to Part-DBProject management: Create projects and assign parts to the bill of material (BOM), to show how often you could build this project and directly withdraw all components needed from DBEvent log: Track what changes happens to your inventory, track which user does what. Revert your parts to older versions.Responsive design: You can use Part-DB on your PC, your tablet and your smartphone using the same interface.MySQL and SQLite supported as database backendsSupport for rich text descriptions and comments in partsSupport for multiple currencies and automatic update of exchange rates supportedPowerful search and filter function, including parametric search (search for parts according to some specifications)Automatic thumbnail generation for picturesWith these features Part-DB is useful to hobbyists, who want to keep track of their private electronic parts inventory, or makerspaces, where many users have should have (controlled) access to the shared inventory.Part-DB is also used by small companies and universities for managing their inventory.Documentation and installation guides can be found here:https://docs.part-db.de/GitHub Repo:https://github.com/Part-DB/Part-DB-server

author: rthorntn
author_rank: Frequent Contributor
timestamp: November 13, 2024, 10:10:38 pm
content: Thanks, this is epic, installed it yesterday in my homelab, Digikey integration and the camera Scanner only appear to work with part-db being on an HTTPS server but the Debian instructions I followed setup HTTP, what to do to get HTTPS setup?
part id: 0703L or 07D3L SOT package - Page 1
Forum section: electronics / projects

author: jancumps
author_rank: Unknown
timestamp: May 08, 2014, 07:03:02 pm
content: I have a defect external harddrive on my desk, where a SOT component is burned out.There is a twin one sitting next to it, with the part number 07D3L or 0703L, hard to read.Anyone know what this is?On the attached photo, the yellow circled one is the burned one, the red circled one its twin.The pcb belongs to the Medion HDDrive 2 GO. It's Q3.The IC nect to it says (again: hard to read) IT7612M
Part ID help - Page 1
Forum section: electronics / projects

author: Harvs
author_rank: Super Contributor
timestamp: October 14, 2022, 03:01:33 am
content: Hi Folks, wondering if anyone recognizes the attached IC by chance?Googles not helping much, and to me, by the poor quality molding it's probably some low cost generic part. A bad repair has been done around it in the past which has resulted in cracked leads.From where it is in the circuit I'm repairing I think it's possibly a amplifier, line driver or something similar. But hard to be certain at this stage, would really help to know what it is and have the pin out.Thanks

author: exmadscientist
author_rank: Frequent Contributor
timestamp: October 14, 2022, 03:41:14 am
content: Looks like OPA2209 perhaps?

author: Harvs
author_rank: Super Contributor
timestamp: October 14, 2022, 06:38:27 am
content: The pin out does seem to match, and the "OOJI" marking specified in the datasheet could be that bottom line.Looking at some OPA2209 images I think you got it. Top line would be TI for Texas Instruments, I guess the 55 is some sort of batch number?
Part Identification - Page 1
Forum section: electronics / projects

author: bill53
author_rank: Contributor
timestamp: March 19, 2019, 06:20:05 am
content: Hi, I'm new so please forgive me if this is in the wrong section.I'm trying to identify a part with the following part number: STmicroelectronics 6M3416. I've tried Google, STmicro, and some of the so-called part finding sights without joy. I think it's a MOSFET used in the speed control of a RYOBI jigsaw.Any help would be appreciated. ThanksBill53

author: bill53
author_rank: Contributor
timestamp: March 19, 2019, 08:18:18 am
content: OK A picture. Sorry writing on the part is very faint.

author: Nusa
author_rank: Super Contributor
timestamp: March 19, 2019, 09:04:58 am
content: ^https://www.st.com/resource/en/datasheet/stp75nf75.pdf
Part identification  - Page 1
Forum section: electronics / projects

author: Miti
author_rank: Super Contributor
timestamp: April 08, 2020, 01:49:39 pm
content: Good day, I hope you’re doing well,Can anybody help me identify U8 on page 24 of the attached document ?I tried HX73-15 and NX73-15 and I got nothing.Thanks!

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: April 09, 2020, 01:44:39 am
content: Quote from: Miti on April 08, 2020, 01:49:39 pmHuh. Avia Semiconductor uses designation starting with HX7

author: Miti
author_rank: Super Contributor
timestamp: April 09, 2020, 11:09:25 am
content: One clue is, I don’t see any clock on the board so, unless there’s an oscillator on the bottom side, it may be a clock multiplier making some MHz from the horizontal sync.

author: Miti
author_rank: Super Contributor
timestamp: April 18, 2020, 08:15:10 pm
content: I found it, actually member SiliconWizard found it. It is MK9173-15.
Part identification - Page 1
Forum section: electronics / projects

author: gaminn
author_rank: Frequent Contributor
timestamp: November 20, 2023, 11:53:56 am
content: Hi,any idea what's this (part number)? Thanks

author: Zero999
author_rank: Super Contributor
timestamp: November 20, 2023, 05:48:35 pm
content: It looks like a diode.What device was it taken from?

author: DavidAlfa
author_rank: Super Contributor
timestamp: November 20, 2023, 06:20:25 pm
content: NR = SMBJ75A TVS diode, unidirectional, 75V,datasheet.

author: gaminn
author_rank: Frequent Contributor
timestamp: November 20, 2023, 08:34:32 pm
content: Thanks. My diode tester shows 0 V for both directions of the TVS and ohm meter shows exactly same value in ohms for both directions of the TVS. Depending on TVS it shows from 3 to 20 ohm. So I guess they are all destroyed, right?

author: Zero999
author_rank: Super Contributor
timestamp: November 20, 2023, 08:55:30 pm
content: If it conducts in both directions, under its rated voltage, then it's bad. It's highly it's not the only bad part: many other components will have been destroyed.
Part identification - Page 1
Forum section: electronics / projects

author: gaminn
author_rank: Frequent Contributor
timestamp: September 12, 2016, 02:28:34 pm
content: Hi all,can you please help me to identify part on the PCB. The PCB is thermocouple to 0 - 10 V converter.Thanks

author: Jeroen3
author_rank: Super Contributor
timestamp: September 12, 2016, 02:42:26 pm
content: Most likely an ADC from Analog Devices considering it's location next to the digital isolator.AD7684 perhaps. (which has C1D marking)

author: gaminn
author_rank: Frequent Contributor
timestamp: September 12, 2016, 05:06:09 pm
content: Thanks! AD7684 has exactly the pinout as expected on the PCB.
Part identification - Page 1
Forum section: electronics / projects

author: mscreations
author_rank: Contributor
timestamp: July 02, 2017, 10:56:22 pm
content: Hello,I'm hoping someone knows what part I'm looking at. It is a SOT-23 SMD device marked 8VT with a sideways T. I'm honestly not sure what kind of component it is. This is out of the current sensor for a telemetry unit used on a forklift. The sensor has a CSLA2EN, 4 of these SMD devices and a couple capacitors between +/- and output on the sensor.Thanks

author: Marinated
author_rank: Contributor
timestamp: July 03, 2017, 12:53:55 am
content: Suggestive, but a photo would be useful to be sure.

author: mscreations
author_rank: Contributor
timestamp: July 03, 2017, 01:42:40 am
content: Yeah, I had to run quickly and was trying to get a post out. After getting home and getting the rest of the potting material off the circuit board, I found that all 4 of the devices have connections to pins 1 and 2 only. Pin 3 has no connection. Pin 1 on each pair of the devices are tied together. Pin 2 goes elsewhere in the circuit. R2 and R3 (not marked. Under C3) are both 0 ohm resistors.I attached a layout image of what I have and a photo of the device in question. I'm thinking maybe a diode, but I've never seen two diodes facing each other in that configuration before.

author: DTJ
author_rank: Super Contributor
timestamp: July 03, 2017, 02:43:33 am
content: Some options here perhaps:http://www.s-manuals.com/smd/a8

author: Nusa
author_rank: Super Contributor
timestamp: July 03, 2017, 02:51:30 am
content: My guess:http://www.s-manuals.com/pdf/datasheet/m/m/mmbz5225-mmbz5267_vishay.pdf

author: mscreations
author_rank: Contributor
timestamp: July 03, 2017, 03:15:38 am
content: Thanks! My guess is it is a 15v small signal zener. I think they are maybe using them to protect the CSLA2EN sensor from overvoltage? In the configuration they are in it'd limit the voltage to what, 15.7 volts or so?
Part Identification - First Time Poster - Page 1
Forum section: electronics / projects

author: presnwa
author_rank: Newbie
timestamp: September 20, 2023, 03:42:32 pm
content: BTW, this is my first time posting, so I hope I'm in the right section. That said, could someone help me with a some part identification? I've never seen this logo, or symbols, before. I can't even guarantee they're Latin characters. See attached for images. BTW, Sorry for the poor quality photos, the parts being so small combined with the conformal coating and non-steady hand made clear photos difficult.

author: Terry Bites
author_rank: Super Contributor
timestamp: September 20, 2023, 04:01:58 pm
content: Welcome. DFE?You might start here:https://smd.yooneed.one/XC6117.. would that make sense on your pcb?

author: presnwa
author_rank: Newbie
timestamp: September 21, 2023, 05:15:24 pm
content: It would, it bothers me that the letters aren't aligned. Also, the part making in the datasheet says there should be 4 letters. I guess it could be counterfeit or a reject from the black market. I'll just proceed with the assumption that it's XC6117. Thanks.
Part identification help: LGVN 517C opamp - Page 1
Forum section: electronics / projects

author: Pack34
author_rank: Frequent Contributor
timestamp: February 02, 2018, 09:47:54 pm
content: I'm suspecting that this is either an opamp or some kind of analog mux.Does the image or part number look familiar to anyone?

author: exmadscientist
author_rank: Frequent Contributor
timestamp: February 03, 2018, 10:15:16 pm
content: That'd be a Linear Tech LTC6247 in the DFN-8 "DC" package.
Part identification - high voltage SMD ceramic thick film resistor - Page 1
Forum section: electronics / projects

author: r0d3z1
author_rank: Regular Contributor
timestamp: April 10, 2019, 06:17:12 am
content: Can anybody help to identify this component ?It looks like an high voltage SMD ceramic thick film resistor. The left pin are connected to the DC-link and from the 6 pin on the right start 6 tracks directed to the microcontroller.Thanks

author: Gyro
author_rank: Super Contributor
timestamp: April 10, 2019, 10:06:36 am
content: Strange (from your connection description). It looks more like a current shunt, with the current pins on the right, shared over multiple pins, and the potential sense pins on the left.

author: T3sl4co1l
author_rank: Super Contributor
timestamp: April 10, 2019, 10:18:20 pm
content: Alternately, it looks like not much ratio, e.g., about 15 squares of resistance on the long arms, and one square in the middle. So, a differential gain of 1/15 to 1/30, depending on exactly how the fields work out.That assumes the conductive traces are solid underneath the enamel, and not snaking further.I can say say with confidence, you aren't going to find this unless it's specifically made available by the manufacturer as a replacement part. Consider replacing the board.Tim

author: r0d3z1
author_rank: Regular Contributor
timestamp: April 12, 2019, 11:56:17 am
content: Quote from: Gyro on April 10, 2019, 10:06:36 amInitially I have also thought the same, however the connection doesn't make sense for a shunt.Quote from: T3sl4co1l on April 10, 2019, 10:18:20 pmThank you Tim, however the post is not for a repair/replacement purpose. I was curious to understand what this component could be. If it is not a shunt, what could it be ?

author: T3sl4co1l
author_rank: Super Contributor
timestamp: April 12, 2019, 01:27:10 pm
content: Well then... measure it and see what it is. It's a four way resistor. Low values suggest current shunt, high values suggest voltage sense.Otherwise, no, I don't have any particular insight into why it's drawn the way it is. Who knows...Tim
Part Identification. Odd value resistor? - Page 1
Forum section: electronics / projects

author: Robert A
author_rank: Contributor
timestamp: September 11, 2019, 10:10:14 am
content: Hi, I need help identifying this resistor. It’s in an SMPS and has let the magic smoke out. The bands look like they are black, white, silver, gold and green but that doesn’t calculate to anything sensible. Also I think it’s in a 1W case. Any help is appreciated.

author: amyk
author_rank: Super Contributor
timestamp: September 11, 2019, 11:50:25 am
content: Where in the circuit is it located? My guess is 0.098 ohm 0.5% given that you can get resistors with that value.

author: ArthurDent
author_rank: Super Contributor
timestamp: September 11, 2019, 03:03:04 pm
content: The question is what caused this low value resistor to fail. A replacement component will probably fail the same way unless you find and correct the real problem.

author: Robert A
author_rank: Contributor
timestamp: September 11, 2019, 03:45:18 pm
content: Pleas accept my apologies but I’ve somehow managed to post this question on two different sections, this one and on Repair. I have also tried to remove this post and am continuing the conversation on the Repair section, so if you, Amyk and ArthurDent, could follow the other post that would be great. Once again sorry and hope to see you over there.
part identification on an i2s to AES converter board - Page 1
Forum section: electronics / projects

author: jmibk
author_rank: Regular Contributor
timestamp: January 08, 2021, 08:59:39 am
content: Hi,I got this i2s to AES audio converter board and like to use this on my own projects - so I have to identify all parts on it:Can't get any hint on U2 (the smaller IC 20 pin)On the left side, this is an WM8805 =>https://statics.cirrus.com/pubs/proDatasheet/WM8805_v4.5.pdfMiddle top, this is an DS8921M =>https://www.ti.com/lit/ds/symlink/ds8921.pdfright side, this is an transformer PE-65612NL =>https://www.mouser.at/datasheet/2/336/-370369.pdfthe unknown part is an P44AD, V244It seems to be some kind of buffer.On side pins 1-10:Pin1 goes to the 2 row pin header and is labeled "OSD_ON"Vias go to the 4 drill holes left of the chip marked "I2S".The 4 lines to the 2 row pin header are labeled also with I2S on the bottom side.pin 10 is groundpins 11 - 20:4 lines through melf resistors are I2S lines (output on the P44AD, input on the WM8805)pin 19 goes to the JMP2 and is connected to ground. JMP3 is open and connects Pin 19 to Pin1 if closed.pin 20 is VCC 3V3Maybe someone any hint about this part U2?

author: 2N3055
author_rank: Super Contributor
timestamp: January 08, 2021, 09:04:21 am
content: 74V244 (FAIRCHILD)some sort of 74244 buffer.... probably something like 74VHC244

author: jmibk
author_rank: Regular Contributor
timestamp: January 08, 2021, 10:27:12 am
content: QuoteThanks, that fits. Sometimes the parts are so simple and you can't spot the right thing. Thanks man!For those that are interested in the circuit, here is the schematic (designators don't match with the board!) and some pics of the pcb's.http://www.audiowerk.at/downloads/temp/eev/i2s_aes/Schematic_I2S_TO_AES_2021-01-08.pdfhttp://www.audiowerk.at/downloads/temp/eev/i2s_aes/board1.jpghttp://www.audiowerk.at/downloads/temp/eev/i2s_aes/board2.jpg
Part Identification Question: Bose Soundlink 3 speaker aux connector - Page 1
Forum section: electronics / projects

author: Conan117117
author_rank: Newbie
timestamp: August 24, 2016, 03:21:32 am
content: The audio input connector on my speaker snapped off and I am having problems finding a connector with same specifications on digikey, mouser, etc. The attached picture is a picture of the connector in the soundlink 2 i/o board. It seems to be the same as the one that broke on my speaker (its a thru hole connection with 7 total pins going thru the board). Please help me identify the part!
Part identification - Some kind of 6 pin switch/MOSFET? - Page 1
Forum section: electronics / projects

author: pcbbc
author_rank: Newbie
timestamp: February 01, 2025, 05:34:21 pm
content: Help identifying the following high side switching component with identification 35 ┛, or is that a J?Starting from top right, which I assume is dot on pin 1:1 0v2 Connected to MPU (gate?)3 Load4 +5V supply5 & 6 are tied together, and aren’t connected anywhere else other than the apparent test pointWhen MPU takes pin 2 high, +5v supply is switched from pin 4 to load on pin 3. Pins 6 &7 are connected to 0v.When MPU takes pin 2 low, supply is disconnected from pin 3. Pins 6 & 7 are connected to +5v.From an early 2000’s Audi instrument cluster. And yes, the placement of the package is a total disaster. That’s just how it came from the factory!Some clusters are missing this component for switching +5v power to a small external radio clock receiver module. Ideally I’d like a drop in replacement.

author: pcbbc
author_rank: Newbie
timestamp: February 01, 2025, 06:20:35 pm
content: Okay, sort of answering my own question after some Googling.But it's a dual MOSFET package with one N-type and one P-type, isn't it? That would explain pin 6 of the first MOSFET being connected to pin 5 of the second.

author: pcbbc
author_rank: Newbie
timestamp: February 01, 2025, 07:43:33 pm
content: Okay, the SMD marking database has it I think. Couldn’t see for looking.MUN5335DW Motorola SOT-363 NPN+PNP transistorsDual, Sw, 50V, 100mA, 200mW, R1/R2=2.2k/47k
Part number for those cheap 3x6mm 2-pin SMD tact switches - Page 1
Forum section: electronics / projects

author: HSPalm
author_rank: Regular Contributor
timestamp: August 09, 2016, 01:15:25 pm
content: Hi,On many products I buy I find the same type of SMD tactile switch. It looks like the "regular"one, only cut in half. But I can't find anything similar on Digikey or mouser.On aliexpress and ebay they can be found as "3x6 smd switch", in different heights. Here's a couple examples:http://www.aliexpress.com/item/3-6-2-5MM-3x6-SMD-Tact-Switch-imported-red-button-2-feet/32708221611.htmlhttp://www.aliexpress.com/item/1000pcs-lot-3-6-4-3MM-touch-switch-white-SMD-2-feet-micro-switch-limit-switch/32336213908.htmlI want a switch I can have my chinese manufacturer source for cheap, and also an alternative at digikey/mouser when/if producing locally.I am interesten in part numbers, datasheets and compatible parts.

author: HSPalm
author_rank: Regular Contributor
timestamp: August 09, 2016, 01:26:45 pm
content: Sorry guys, found lots of them. It was the dimensions that fooled me, they're actually 6x3.5mmhttp://www.digikey.com/product-search/en/switches/tactile-switches/1114206?k=&pkeyword=&pv258=48&FV=1140003%2C8dc0011%2Cfff40011%2Cfff8005e&mnonly=0&newproducts=0&ColumnSort=0&page=1&quantity=0&ptm=0&fid=0&pageSize=500
Part recommendation micro voltage  regulator for battery powered stuff - Page 1
Forum section: electronics / projects

author: Daque
author_rank: Contributor
timestamp: September 20, 2019, 04:47:06 pm
content: I looking for a good inexpensive 3.3v regulator low quiescent current and maybe good for a half amp or one good for 250 ma with an enable pin. Target will be ESP32-Wroom and misc. Maybe using a 2nd one the ESP could turn on would work out better? Thoughts and comments welcome.

author: aiq25
author_rank: Regular Contributor
timestamp: September 20, 2019, 07:32:56 pm
content: Quote from: Daque on September 20, 2019, 04:47:06 pmWhat's the input voltage range?

author: TheHolyHorse
author_rank: Regular Contributor
timestamp: September 20, 2019, 09:48:04 pm
content: This is why mouser digikey etc have parametric search on their websites, just select the parameters you want and you'll get some to choose fromYou know your requirements best so I'd encourage you to go to some supplier or manufacturer and play around in the parametric search, I'm sure someone has what you need.
Part Replacement  - Page 1
Forum section: electronics / projects

author: Cigarsnob
author_rank: Regular Contributor
timestamp: March 14, 2014, 08:54:44 pm
content: Hi Everyone,I'm looking for a part replacement for this part: EXC-CET101U.I'm looking for a part that is smaller in size (smaller than 1807), but with the same or close specs. I've been looking on Digikey and Mouser, but I haven't seen anything. Can anyone recommend a smaller part?
Part S10BdA1 datasheet  - Page 1
Forum section: electronics / projects

author: sdancer75
author_rank: Frequent Contributor
timestamp: June 03, 2024, 03:28:34 pm
content: Can someone recognize the part S10BdA1 attached? Does exist the datasheet of this?

author: RoadRunner
author_rank: Frequent Contributor
timestamp: June 03, 2024, 05:35:51 pm
content: Its a Switching regulator, STI3408BDatasheethttps://wmsc.lcsc.com/wmsc/upload/file/pdf/v2/lcsc/2007241904_TMI-STI3408B_C708874.pdf

author: sdancer75
author_rank: Frequent Contributor
timestamp: June 03, 2024, 07:46:21 pm
content: Excellent, may I ask how did you find it?

author: RoadRunner
author_rank: Frequent Contributor
timestamp: June 03, 2024, 08:59:47 pm
content: I just googled the part number you had on the image with word "Regulator" as with inductor connected to it, it has to be regulator.

author: sdancer75
author_rank: Frequent Contributor
timestamp: June 04, 2024, 05:42:16 am
content: I googled the part number without the word regulator and I got nothing :-) Thank you !!!
Part search: Molex-style 8-channel wire connector? - Page 1
Forum section: electronics / projects

author: analogo
author_rank: Regular Contributor
timestamp: May 12, 2017, 06:06:16 am
content: Could someone help me find a connector with the following characteristics (and a rating of 5v/500mA)?* 8 pin* both header and housing have protected pins (cannot be touched)* housing connectors mounted via 0.1"-pitch through-hole (or can be panel-mounted)* polarized (nice, but not required)* easy to find, as much "jelly-bean" as possibleBasically what I want is something like a Molex mini-fit jr, but they are too stiff. This cable will be attached and detached multiple times per day.I couldn't find anything like this on Octopart, Mouser and the other distributors. The connector section is depressingly complex.

author: DTJ
author_rank: Super Contributor
timestamp: May 12, 2017, 07:01:54 am
content: Quote from: analogo on May 12, 2017, 06:06:16 amWatch out for the number of cycles the connector is specced for. Some are in the low 10's of cycles before they may fail.

author: akis
author_rank: Frequent Contributor
timestamp: May 12, 2017, 09:58:27 am
content: http://uk.farnell.com/molex/39-29-9103/connector-header-10pos-2row-4/dp/2612677?mckv=Kbfu9hLr_dc|pcrid|78108377229|&gross_price=true&CATCI=pla-131229622629&CAAGID=14989678509&CMP=KNC-GUK-GEN-SHOPPING-MOLEX&CAGPSPN=pla&gclid=CjwKEAjwutXIBRDV7-SDvdiNsUoSJACIlTqlV_Ue57XZlwwInyCoXT4TVX3WnInzIbGU31E3fwRlihoCMYbw_wcB&CAWELAID=120173390001887487or the mini fir series ?

author: analogo
author_rank: Regular Contributor
timestamp: May 12, 2017, 10:14:02 am
content: Quote from: analogo on May 12, 2017, 06:06:16 amQuote from: akis on May 12, 2017, 09:58:27 amAs I said, that series of connectors would be OK for my application but they are too stiff (it takes quite a bit of force to insert and remove them) and their stated mating cycles is only 30 insertions.
Part suggestions for SO8 H-Bridge IC - Page 1
Forum section: electronics / projects

author: Cyril.Anthony
author_rank: Contributor
timestamp: August 20, 2018, 03:08:46 am
content: Hi guys , I'm looking for a cheap SO8 H-Bridge IC for a small 500mA dc motor.Thanks.

author: technix
author_rank: Super Contributor
timestamp: August 21, 2018, 08:33:59 am
content: Voltage?(My best idea is four SO-8 packages: 2x IR2101 half bridge gate drivers and 2x SO-8 dual NMOS’s.)

author: Cyril.Anthony
author_rank: Contributor
timestamp: August 22, 2018, 01:31:28 pm
content: 7v maxlet me checkout the gate drivers

author: technix
author_rank: Super Contributor
timestamp: August 22, 2018, 08:08:49 pm
content: Quote from: Cyril.Anthony on August 22, 2018, 01:31:28 pmIf it is no higher than 5.5V, you might be able to get away with 74LVC2T45 + 2x SO-8 complementary MOS pairs connected into CMOS inverters. 74LVC2T45 optional if you are using 5V microcontroller, otherwise that chip is the level shifter.

author: RobK_NL
author_rank: Frequent Contributor
timestamp: August 23, 2018, 09:57:32 am
content: ZXBM5210
Part wanted: Small, easy to use motion detector IC? - Page 1
Forum section: electronics / projects

author: con-f-use
author_rank: Unknown
timestamp: August 31, 2013, 04:59:23 pm
content: I'm looking for a small easy to use motion detector IC to couple to a micro controller. It should be able to detect if a human is moving within a very small room. I have never used such a component before so I'd be happy about some suggestions. Thanks in advance.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: August 31, 2013, 05:21:35 pm
content: http://pewa.panasonic.com/components/built-in-sensors/passive-infrared-sensors/papirs-ekmb/

author: Erwin Ried
author_rank: Regular Contributor
timestamp: August 31, 2013, 05:25:48 pm
content: If the room is fairly small you can use ultrasonichttp://www.ebay.com/itm/Arduino-Ultrasonic-Module-HC-SR04-Distance-Measuring-Transducer-Sensor-HS-/111147070142?pt=LH_DefaultDomain_0&hash=item19e0e1b2beand bounce the sound in the first wall (at least in my brick wall the distances add up at 90%, so it makes a 'z' pattern to detect movement)

author: rastro
author_rank: Frequent Contributor
timestamp: August 31, 2013, 06:06:12 pm
content: I think these are standard in alarm systems for motion detection.Adjust IR Pyroelectric Infrared PIR Motion Human Sensor Detector Modulehttp://www.ebay.com/itm/Adjust-IR-Pyroelectric-Infrared-PIR-Motion-Human-Sensor-Detector-Module-New-/300956563511?pt=LH_DefaultDomain_0&hash=item461268b837

author: tubos
author_rank: Contributor
timestamp: September 01, 2013, 03:07:25 pm
content: I've used the Panasonic pirs as well they are very nice , take up a very small amount of currentto work ( they have versions that work with 1uA)Digital and analog out versions.However they are not cheap from 20 to 30 euro.check out a board i made with these.http://mcuprojects.blogspot.be/

author: con-f-use
author_rank: Unknown
timestamp: September 01, 2013, 04:02:41 pm
content: Thank you so much people. I guess I'll try the cheapo china ware sensor first. It that doesn't work it's gonna be the panasonic.
Particle detector - DIY - Cloudchamper, Sparkchamber & geiger-müller tube - Page 1
Forum section: electronics / projects

author: julius oe.
author_rank: Contributor
timestamp: March 01, 2016, 06:08:03 pm
content: Hi there! This is some older Project: a simple Cloud-diffusion Chamber.The condense trails you see in my gifs of alpha- and beta(minus)- particles.Its a thermo-electrical heat pump witch cools it down. It took a while to stabilize the temperature down to under -30°C and to find the proper vapor. Its 99,9% Isopropanol. My IR measurement system failed under-37°C. The room temperature was about 20°C. So delta °T max is around 60°C.In the red pictures i used a strong Laser to get a line just above the cool plate. Nice contrast, but not good for the eyes. so now I’m using blue leds. Maybe i go back to Laser, but i would capture with a camera so i can watch on a screen.The overall Power is about 120 Watts. A 90W Peltier (15V@6Amax.) is the main heat pump, supplied with 12V. A 40W Peltier driven only by 5V is the secondary pump. It just lies ontop of the first one. If it gets 12V too the Peltier gets too warm and i reached only -26°C min.I will try a new test-run soon, with low radiation sources.*can be used as a instant ice cubes machine! (:Any ideas, suggestions or hints for a proper spark-chamber ?or how can I adjust/regulate high voltage poroperly?

author: HAL-42b
author_rank: Frequent Contributor
timestamp: March 01, 2016, 06:23:44 pm
content: Love it!
Parts for transistor radio projects - Page 1
Forum section: electronics / projects

author: Dan Moos
author_rank: Frequent Contributor
timestamp: December 26, 2018, 05:40:52 pm
content: I got into electronics as a child in the '80s. The typical hobbiest then would have done a lot of transistor radio stuff, but after my first crystal receiver, I moved in to different things in the hobby. I've always wanted to fill this hole in my experience though.My main hurdle is parts. Specifically, the little can inductors and transformers with the adjustable ferrite slugs. To be clear, I CAN find them at mouser, but I have know idea what values to get for general experimentation. I'm looking for either a kit loaded with the commonly used ones, or at least a shopping list of what those common values are so I can assemble such a kit.

author: Zero999
author_rank: Super Contributor
timestamp: December 27, 2018, 10:01:32 am
content: What sort of transistor radio?FM, AM?Is it going to be a simple tuned circuit with an amplifier or a superheterodyne receiver?The transistors are generally not critical, although you want something relatively high power to drive the speaker.

author: ledtester
author_rank: Super Contributor
timestamp: December 27, 2018, 03:43:40 pm
content: Have a look at theElenco AM/FM radio kitYou can find the assembly manual here:https://www.elenco.com/wp-content/uploads/2017/10/AMFM-108CK_low-res-2.pdf

author: MasterT
author_rank: Frequent Contributor
timestamp: December 27, 2018, 04:14:40 pm
content: Aliexpress sells transistor radio kits, I've build one myself when nostalgia hit me.

author: Benta
author_rank: Super Contributor
timestamp: December 27, 2018, 04:16:53 pm
content: The little can inductors/transformers were once sold as sets, like mixer, 1st IF, 2nd IF etc. You might be able to find a set somewhere.
Paschen's law - spark gap distance at high pressures - Page 1
Forum section: electronics / projects

author: honeybadger
author_rank: Contributor
timestamp: August 06, 2019, 07:24:30 pm
content: Hi,I "need" to know breakdown voltage of air at 8 bar pressure. I spent 2 hour of googling and found nothing. I just need a simple graph of "air breakdown voltage VS air pressure".There is a lot of these charts:https://en.wikipedia.org/wiki/Paschen's_law#/media/File:Paschen_curves.svgI don't understand them... vertical scale is in "V" , not "V/m".And then there is the Paschen's law... can anybody understand that? Where can I find all these constants?

author: mikerj
author_rank: Super Contributor
timestamp: August 06, 2019, 07:43:24 pm
content: Check the horizontal scalepdi.e. pressure multiplied by electrode separation.

author: honeybadger
author_rank: Contributor
timestamp: August 06, 2019, 10:49:21 pm
content: mikerj: thanks, it makes sense now.So if "pd = pressure x electrode gap" remains constant -> this means breakdown voltage must remain constant. Twice the pressure -> 1/2 electrode gap = same breakdown voltage.Is it really this simple?If at 1 bar (absolute) I need 3kV per mm -> at 10 bar (absolute) I would need 3kV per 0.1mm, which is 30kV/mm. Am I correct?

author: floobydust
author_rank: Super Contributor
timestamp: August 07, 2019, 05:47:58 am
content: I thought Paschen's law is more about the non-linearities on the low end (low pressures, very small µm gaps) but larger gaps/higher pressures behave more linearly.8 bar is around 116 PSI or close to automotive compression stroke pressure. You can see this on sparkplug testers that take shop compressed air and apply that to a chamber with a sparkplug mounted in it. 1mm spark gap is around 30kV, although turbulence, electrode geometry, ozone, polarity matter.

author: Le_Bassiste
author_rank: Frequent Contributor
timestamp: August 07, 2019, 10:03:17 am
content: fyi,http://home.earthlink.net/~jimlux/hv/hvmain.htmespecially,http://home.earthlink.net/~jimlux/hv/paschen.htm

author: Plasmateur
author_rank: Regular Contributor
timestamp: August 08, 2019, 01:53:23 pm
content: Is this for AC or DC? For much higher frequencies, Pachen's curve will be modified.Check out page 23 of the PDF here:https://apps.dtic.mil/dtic/tr/fulltext/u2/1018515.pdf
Pass PWM  but  block  steady DC - Page 1
Forum section: electronics / projects

author: JoeyG
author_rank: Regular Contributor
timestamp: July 20, 2023, 08:28:42 am
content: I looking for circuit suggestions at 5V Logic, that can pass a PWM signal and block Vdd steady signal up to about 20KHz.THe PWM would be 0 to 95% I'm thinking something with an XOR gate and and RC time constant to set the period when the signal stays high too long.When the time is too long on logic high (not PWM) the should be logic zero.

author: tooki
author_rank: Super Contributor
timestamp: July 20, 2023, 08:46:19 am
content: Perhaps something using a retriggerable monostable multivibrator, but triggered on a low pulse rather than a high one?That would catch very small low pulses, so that even e.g. 99.9% duty cycle wouldn’t be detected as DC. On the other hand, if it makes sense in your application foralmost 100%to count as 100%, you could also consider some kind of filtering to analog, and use a comparator.

author: Marco
author_rank: Super Contributor
timestamp: July 20, 2023, 09:28:48 am
content: I think your description is too poor.Is it just a PWM signal riding on Vdd? If so just level shift.Should a long high input signal be regarded as idle and pull the output low? RC filter it with a bypass diode across the resistor so low level is immediately passed, invert it and combine it with the input with an AND gate. (Though I question the sanity of the application.)

author: wasedadoc
author_rank: Super Contributor
timestamp: July 20, 2023, 09:49:51 am
content: PWM contains AC and DC. A capacitor can pass AC and block DC. The DC in PWM can be easily reconstituted after the capacitor.

author: PCB.Wiz
author_rank: Super Contributor
timestamp: July 20, 2023, 08:05:58 pm
content: Quote from: JoeyG on July 20, 2023, 08:28:42 am#1 is a good start.You need a retriggerable monostable for the time window, but it will signal at both 0% and 100%If you want 0% ( or 100% ?) to do something else, you need more logic, and a better descriptionAn AND gate can combine pwm with mono.q to force 0 on static hi.

author: Marco
author_rank: Super Contributor
timestamp: July 20, 2023, 08:52:57 pm
content: Oops, I guess XOR works, but you still need to bypass the resistor with a diode to get it to work instantly when input goes low.
Passing EMC with wireless power transmitter/receiver - Page 1
Forum section: electronics / projects

author: Day101
author_rank: Contributor
timestamp: November 10, 2021, 08:05:59 pm
content: I want to use wireless power to charge a tiny LIR1620 coin cell. This is for use in a product I'm trying to design. I understand the Wireless power transfer is excluded from special testing by complying with these rules.I did some bench tests with coils and basic half/full rectified circuits on the breadboard which worked quite well but I'm concerned that I could have problems passing EMC testing.Obviously I've not made a product before so I don't know what problems I will face. I also don't (yet?) have the required equipment to do basic EMC testing at home.Can anyone tell me if this is likely to cause problems?

author: Benta
author_rank: Super Contributor
timestamp: November 10, 2021, 08:36:43 pm
content: You're not excluded from anything at all.Anything you do needs to be compliant with the LVD, RFD, EMC, etc. directives, with associated/appropriate harmonized standards (ENxxxxx). That you've found a couple of sentences somewhere is irrelevant, and only fitting to one certain scenario.I strongly suggest that you involve a CE consultant early in the process, before this gets out of hand. The costs later may kill your business.

author: Day101
author_rank: Contributor
timestamp: November 11, 2021, 08:28:04 am
content: Thanks for your reply, I should have given more info. I spoke to a testing house a few months ago and for the USA I only need EMC. And wireless power systems normally require special testing by the FCC but not if I follow the limitations I quoted in that FCC document.It makes my design better if I can use wireless power transfer and a LIR1620, but I can make a product with a 3 month life using a CR1620 instead.My concern was that a wireless power transmitter to charge the LIR1620 might be difficult to pass EMC.
Passive Infrared Sensor to control a small motor-simple circuit design required - Page 1
Forum section: electronics / projects

author: nevillet
author_rank: Contributor
timestamp: July 10, 2023, 07:11:31 pm
content: Hi All,I have a PIR sensor module that runs on 6V and I'd like to control a small 12V DC motor with it.The HC-SR501 sensor outputs approx 2.5V when triggered and I'd like to control the motor with something like a TIP120 (as I have a few to hand)Can someone please design me a simple circuit?Many thanks.