hybridfree/eevblog-posts huggingface dataset:
Uni-T UT210E/211B as current probe? - Page 1
Forum section: electronics / projects

author: iXod
author_rank: Frequent Contributor
timestamp: June 08, 2021, 04:54:49 am
content: Many of us have a scope current probe and don’t know it: the Uni-T UT210E (and it’s better DC-current-resolution cousin the UT211B).I wonder why someone here hasn’t already lead the way to hack this and add a BNC output.Anyone care to share their hack details?

author: mikerj
author_rank: Super Contributor
timestamp: June 08, 2021, 09:00:13 am
content: This may be useful for you:https://thearduinoshed.wordpress.com/2020/04/13/uni-t-ut210e-current-clamp-hacking/The extra resolution of the UT211B is of little relevance if you want to use it as a current probe, it may even be worse if the additional resolution required the hall sensor signal conditioning to have a lower bandwidth. FWIW the UT210 only has a bandwidth of around 5kHz, but it can be increased:

author: iXod
author_rank: Frequent Contributor
timestamp: June 08, 2021, 12:31:35 pm
content: Quote from: mikerj on June 08, 2021, 09:00:13 amIt’s not. Joe stops short of the details, showing just the broad strokes. Tantalizing, yes.

author: Gyro
author_rank: Super Contributor
timestamp: June 08, 2021, 12:38:18 pm
content: This post may help regarding improvement of the UT210E by optimising the gain/bandwidth of the existing opamps. I don't know if the same circuit configuration applies to the UT211B...https://www.eevblog.com/forum/testgear/a-look-at-the-uni-t-ut210e/msg3504060/#msg3504060

author: Trader
author_rank: Frequent Contributor
timestamp: June 30, 2021, 06:52:54 pm
content: Quote from: iXod on June 08, 2021, 12:31:35 pmYes, in the video Joe didn't explain how to do that improvement.
UNI-T UT61E Backlight mod with a twist... - Page 1
Forum section: electronics / projects

author: hgg
author_rank: Frequent Contributor
timestamp: February 11, 2017, 06:16:59 pm
content: Hi everybody,Here is just another UT61E backlight mod but with a twist.This is the usual obligatory modification for every UT61E owner.I had this project going for some months but never found the time to finish it.The fact that I had to solder mod wires to the ES51922 was scary enough to stop me every time...Finally I found the courage to do it and here is the finished product:I've designed the circuit and ended up with the following schematic and components :Then I placed an order with Elecrow which I highly recommend since they deliver very decent PCBswith the lowest prices.I started populating the PCB with all the components and then I remembered why SMD work is not my definition of fun...Dimensions of the PCB are 2.7cm x 2cmSince I had to solder a single wire on the main IC, that was a nice opportunity to modify the factory disabledsleep timer and RS232 functionality as well. Which means two wires...Nightmare! I almost destroyed the multimeter! I soldered two pins together and couldn't remove the solder,twisted one pin. These pins are extremely fragile! After the proper prayers the mod wires were in place.The RS232 pin had to be cut from the PCB trace:Below are some pictures with all the places I needed to connect all the mod wires:RS232 connections:Ground for PCB and LEDs :Buzzer Pad :LED wires connected :LEDs were glued in place with Loctite Super Glue GEL. The LEDs are underneath the wires.(The Gel version is way better than the original.)RS232 wires and IR phototransistor in place :(You also need to solder an IR Led and a resistor to the supplied serial cable PCB which alreadyhas the options but were unpopulated).Buzzer wire :Populated PCB piggybacked on the main PCB:You can also see the PCB VCC red wire connected to UT61E V+ which is live only when the unit is switched on.For the touchpad I used a small piece from a copper sheet 0.12mm :and below is the finished product :Power consumption of the piggyback PCB is 30nA when OFF and 8.8mA with both SMD LEDs ON.Final power consumption of the UT61E now is:2.38mA in Voltage mode,2.47mA with RS232 ON,10.6mA with LEDs ON and178uA in sleep mode.All in all I am very satisfied with the upgrade.The only glitch that it has is, when the backlight is on and you turn the switch only counterclockwise,it might get a false command and turn the backlight off. Maybe this is because I have not shieldedthe purple wire that runs from the small PCB to the copper touch pad.George.

author: JucaTec
author_rank: Newbie
timestamp: October 17, 2018, 01:26:05 am
content: Hi.Can you recharge the circuit images?Thank you.

author: hgg
author_rank: Frequent Contributor
timestamp: October 17, 2018, 04:27:42 am
content: Hi,Here is a link I've created with all the photos :http://ut61e.eu3.org/
Uni-t UT61E Multimeter Mods, Auto power off,Back light, Rechargable Battery ?? - Page 1
Forum section: electronics / projects

author: EDO
author_rank: Newbie
timestamp: September 25, 2019, 12:56:39 pm
content: It seems that a lot off modifications with this Multimeter is of course related to the 9v battery and its current consumption. Auto power off modification, or adding back light LED , or many others is considering current draw and how long before replacing the 9V battery.One alternative might be a 7.4 Li-po or Li-ion battery that is commonly used in drones and other toys. Almost same size as 9v, permanently mounted, with the charging port accessible.Ut61e battery warning light turns on around 5.5v. and accuracy of the meter is very good all the way down to 3V.I wanted to get your opinion on this idea !!

author: magic
author_rank: Super Contributor
timestamp: September 25, 2019, 04:54:05 pm
content: There are off the shelf 2xLiIon batteries in 9V-compatible format.One disadvantage I can imagine is that battery protection circuit may turn it off before the meter displays low battery warning. Maybe warning threshold could be increased.And thank you for reminding I need to charge my NiMHs
UNI-T UTL8212+ PC Program - Page 1
Forum section: electronics / projects

author: FxDev
author_rank: Regular Contributor
timestamp: March 31, 2024, 12:06:03 am
content: I wrote a simple C# program for UNI-T UTL8212+.UNI-T has their own PC software but I didn't like it. And I want tosee voltage/current curve ext..I made this simple C# form, I will share github link...This is the preview of the program:https://github.com/FxDev/UNI-T-UTL8212-PC-Programhttps://youtu.be/Nf8zVeaU5tE
Unidentified Bluetooth SoC - Page 1
Forum section: electronics / projects

author: maros
author_rank: Contributor
timestamp: October 17, 2016, 04:22:31 pm
content: Recently I've bought anel cheapo Bluetooth speakerwith MP3 player and FM radio. Guess what did I do first? Like Dave used to said "don't turn it on - take it apart!". To be honest my expectation was a one big COB, but surprisingly I was wrong. There's four IC's:RL508- FM tuner8002- audio amplifier25D40- 4Mb SPI flashAD9J150-21A - SoCThere's virtually no information about this SoC. I bet that from now the only one search result for that IC name will be this forum post.Does anybody recognize the manufacturer of this chip?

author: Refrigerator
author_rank: Super Contributor
timestamp: October 17, 2016, 06:04:20 pm
content: Most likely a µC with a built in BT transceiver.

author: maros
author_rank: Contributor
timestamp: October 18, 2016, 07:03:39 am
content: Quote from: Refrigerator on October 17, 2016, 06:04:20 pmThank you Captain Obvious, your answer was very helpful.

author: batteksystem
author_rank: Regular Contributor
timestamp: October 18, 2016, 09:13:17 am
content: Genuine Appotech(Disclaimer: I worked in that company before)

author: amyk
author_rank: Super Contributor
timestamp: October 18, 2016, 10:35:45 am
content: Probably Appotech CW6631B (did they buy Conwise?)

author: maros
author_rank: Contributor
timestamp: October 18, 2016, 03:55:51 pm
content: Much appreciated! I knew I will find here some qualified people! It's such a shame there's no details about this SoC.
Unidentified component - Page 1
Forum section: electronics / projects

author: hammil
author_rank: Regular Contributor
timestamp: March 24, 2013, 08:58:42 pm
content: Hey all.I've been trying to reverse-engineer something (the results will come soon, if this component can be identified!) but have no idea as to what the following component is:- SC70 package. 5 lead- Marked 'JSR'Code:+-----+.2V ----| |---- GND| |---- 2V (X)+4V ----| |---- 2V (Y)+-----+The 4V supply is definitely power, since it's directly from a regulator.The others.. I'm not so sure. The Y pin has a square ripple of about 200mV in amplitude, so that sort-of corresponds to the .2V input (it's definitely an input - the output of an optocoupler). The 'Y' pin definitely comes from the output of an op-amp, so it's an input as well. The 'X' pin goes to the input of the same op-amp, which is indirectly connected to the output of another.. I'm fairly sure it's an output, though, since all the others are inputs.Could it be some sort of difference amplifier? Some sort of PLL? I really have no idea.Thanks

author: dr_p
author_rank: Frequent Contributor
timestamp: March 24, 2013, 09:26:41 pm
content: TS5A4594

author: hammil
author_rank: Regular Contributor
timestamp: March 24, 2013, 11:11:36 pm
content: Oh, you beauty!
Unidentified flexible cable - Any clue about manufacturer and sourcing? - Page 1
Forum section: electronics / projects

author: Niklas
author_rank: Frequent Contributor
timestamp: October 03, 2014, 01:57:23 pm
content: I have come across a reel of very flexible wire that is used for an application with a lot of vibrations. The problem is that the reel lacks any kind of markings and has been in the storage for a couple of year so no one really knows where it came from.At first sight it looks like it has 3 twisted strands but the microscope revealed a bit more. Some kind of metal foil is wrapped around a thread made of a plastic material. The total cross section of the wire is approximately 0.25 mm^2 or AWG24 and the wire has no insulation. Any clue about possible manufacturers and sourcing options (mass production) for this kind of wire?

author: Richard Crowley
author_rank: Super Contributor
timestamp: October 03, 2014, 02:04:31 pm
content: That is your classic "tinsel wire". It is used for applications requiring extreme flexibility, typically headphones, earbuds, etc.While it is very flexible, it is also very tricky to terminate. Likely all the commercial applications are crimped. It doesn't take soldering very well.Because it is not very easy to use for common applications, it isn't the kind of thing you find in the catalogs of most wire manufacturers. But there are specialty manufacturers of products for OEM users and that is probably where you will need to search for tinsel wire.http://en.wikipedia.org/wiki/Tinsel_wirehttp://www.thomasnet.com/products/tinsel-wire-94980802-1.html

author: Niklas
author_rank: Frequent Contributor
timestamp: October 03, 2014, 07:51:20 pm
content: Thanks Richard!
Unidentified MMIC ? - Page 1
Forum section: electronics / projects

author: TSL
author_rank: Regular Contributor
timestamp: April 11, 2015, 03:11:19 am
content: Hi all,Looking through my collection of MMICs I found this guy in an unmarked bin. Searching the interwebs for SMD code A6L produces a result saying its an MUN2134. I'm pretty sure its not!So.. anyone have any idea what this guy is ?thanksTim

author: SeanB
author_rank: Super Contributor
timestamp: April 12, 2015, 09:03:22 am
content: Could be this.http://www.minicircuits.com/pdfs/MAR-6+.pdf

author: TSL
author_rank: Regular Contributor
timestamp: April 12, 2015, 09:11:14 am
content: Thanks for that - it probably is - I have vague memories buying a dozen or so of those on special and I probably thought I'd remember to label the bin later!I'll just have to stick one in a MMIC test jig and see what happens, if it lets the smoke out, its not an MMIC. If its OK then I'll sweep it - that will give an idea of what it might beIt'd be nice if manufacturers would not reuse designators like this!regardsTim

author: SeanB
author_rank: Super Contributor
timestamp: April 12, 2015, 09:23:22 am
content: Just check the 2 diagonal pins are grounded internally, and the input side is looking like a 50R DC resistance as a first check.
Unijunction Transistor (UJT) - Page 1
Forum section: electronics / projects

author: T3sl4co1l
author_rank: Super Contributor
timestamp: February 17, 2014, 06:06:07 am
content: A short talk and novel? circuit:http://youtu.be/Iscf6UJF3MYTim

author: AlfBaz
author_rank: Super Contributor
timestamp: February 17, 2014, 06:30:05 am
content: Haven't heard of them for a long time. There was also the programmable unijunction transistor (PUT).

author: SeanB
author_rank: Super Contributor
timestamp: February 17, 2014, 07:45:40 pm
content: I used them. They make great lamp dimmers.
Unipolar stepper drive - is diode clamping bad? - Page 1
Forum section: electronics / projects

author: Circlotron
author_rank: Super Contributor
timestamp: October 27, 2016, 11:40:52 pm
content: Been looking at a lock for an automatic sliding door, and the lock is rotated into position by a 7.5 deg 5-wire stepper. There is very little torque available and sometimes the lock does not operate properly so I have to find out what is going on. The motor has unipolar drive so each winding has a clamp diode across it that stops the winding swinging above the supply rail when it is switched off every cycle. Of course, that means the winding doesn't demag very quickly. Would this put some kind of drag on the motor? The diagram shows each half of the motor as a single centre tapped winding; is it actually like this so that stopping the outgoing winding from swinging above supply would hinder the turn-on of the opposite end winding, similar to a centre tapped transformer? Or are they completely separate windings?
Unipolar Stepper Motor Coil Resistance Specification - Page 1
Forum section: electronics / projects

author: UPI
author_rank: Regular Contributor
timestamp: February 06, 2014, 11:13:03 pm
content: When purchasing a unipolar stepper motor, are the ohms/phase measurement done from the common to one end of the coil or from the two ends while ignoring the common? Seems like an easy question but I am having trouble finding a clear answer.Motor in question is the 3518x-12 with a coil resistance of 12 ohms:http://www.linengineering.com/stepper-motors/3518.aspxMy assumption is that the 12 ohm spec is from common to one end of the coil and that you would measure 24 ohms across the entire coil.Thanks

author: UPI
author_rank: Regular Contributor
timestamp: February 08, 2014, 02:32:46 pm
content: I received an answer from Lin Engineering:Unipolar motor resistances are measured from the center tap (common) to the end of the coil. In other words, a motor advertised as a 10 ohm motor will have a resistance of 20 ohms from end to end and 10 ohms from the center tap to the end.
Unisolder 5.2 - Universal Soldering Station - Page 1
Forum section: electronics / projects

author: Miti
author_rank: Super Contributor
timestamp: April 13, 2019, 09:44:34 pm
content: A very interesting project named Unisolder. It can take almost any soldering Iron and is open source.I made the boards years ago but my lazy bum couldn't be bothered to put them in a box. Actually I didn't find a suitable box at my price point... free.Finally I found some scrap boxes from work. It came out pretty nice. It is a slanted cube pretty much.I thought I should share, I did a search and it didn't come with it being ever posted here so I hope I don't duplicate.MitiEdit: Sorry, I forgot the linkhttp://dangerousprototypes.com/forum/viewtopic.php?f=56&t=7218

author: bitseeker
author_rank: Super Contributor
timestamp: April 13, 2019, 11:41:44 pm
content: Nice job with the enclosure.

author: GreyWoolfe
author_rank: Unknown
timestamp: April 14, 2019, 02:26:01 am
content: Quote from: bitseeker on April 13, 2019, 11:41:44 pm
Unity Gain Buffer Feedback Resistor - Page 1
Forum section: electronics / projects

author: pacmann
author_rank: Contributor
timestamp: March 04, 2022, 11:23:20 am
content: I see circuits of unity gain op amps with a series resistor in the feedback but I also see circuits that have no resistor and just wire connected between negative feedback and output. Whats the reason for the resistor? Is it best to include it? How to size it?I mean to use a LM358 to buffer an analog signal.Thx

author: ejeffrey
author_rank: Super Contributor
timestamp: March 04, 2022, 12:13:41 pm
content: You almost never need it, but there are two reasons you might:Current feedback amplifiers require a specified feedback resistor for stability. The data sheet will tell you what to use.Bipolar opamps can have a large input bias current that is approximately equal on both inputs. In this case a feedback resistor matching the source impedance will reduce the offset error.

author: Kleinstein
author_rank: Super Contributor
timestamp: March 04, 2022, 01:48:11 pm
content: There can be a 3rd reason for the resistor: quite a lot OPs have a limit on the difference between the inputs to something like 1 or 2 diode drops. The extra resitor in the feedback may help to limit the current between the input.

author: Terry Bites
author_rank: Super Contributor
timestamp: March 04, 2022, 02:01:06 pm
content: The LM358 is not a current feedback opamp so dont worry about that. The resistor is there to balance out the effects of input bias currents offset vs temperature- This may be an issue in a high precsion circuit, though it might just makes things worse!See specs for your opamp.The feedback resistor should match the resistive part of source impedance seen by the non-inverting input.With a low spec opamp like a '358 its not going to help at all.

author: TimFox
author_rank: Super Contributor
timestamp: March 04, 2022, 02:58:47 pm
content: Balancing the resistances "seen" by the two inputs is useful when the "offset current" (difference between them) is much less than the "bias current" (current into each input).Traditional bipolar amplifiers often have offset current roughly 10% of the bias current, but FET amplifiers usually have such small bias current that this resistance balance is not needed and merely increases the noise.

author: Benta
author_rank: Super Contributor
timestamp: March 04, 2022, 08:14:08 pm
content: Two more reasons:Very high speed opamps perform best with a feedback resistor. Example: LM6171.And more profane: it might ease PCB layout adding the resistor as "jumper".
Unity Gain Buffer Feedback Resistor - Page 1
Forum section: electronics / projects

author: klr5205
author_rank: Regular Contributor
timestamp: May 19, 2015, 08:39:46 pm
content: I need a refresher on something I should know from school:Can anyone explain why 150 ohms seems to be such a good value for the feedback resistor here? Simulation shows an error of only a few hundred nV with the resistor in place, while a dead short from the output to the inverting input results in over 12uV. I arrived at the value experimentally.Shouldn't it be equal to the parallel combination of my input resistors and the op amp input impedance? The math isn't working out for me so I'd appreciate a quick explanation from someone.It's not even significant for my application... I'm just curious.

author: klr5205
author_rank: Regular Contributor
timestamp: May 19, 2015, 11:16:15 pm
content: Never mind me, the way I was measuring "error" was fundamentally flawed.I feel silly now but correct way is the obvious one.So for example when I only have the 16k resistor switched in at the input (meaning I'm configured to read only a 0V to approx 10.5V range), the feedback resistor is calculated as 16k // 40k = 11.4k.For a 10.5V input this simulates to a 2.9999864V output which is nearer to my intended 3v than I'll ever realistically achieve.Thanks to anyone who had a look though
Universal 4-wire, high power PWM fan controller - Page 1
Forum section: electronics / projects

author: nexus
author_rank: Regular Contributor
timestamp: October 31, 2023, 06:14:40 am
content: Hi all,Just about ready to release a project of mine that has been in the making for a bit. This is flexible DC fan controller that can handle most fans up to 60 volts at relatively high power (for computer fans).Here is a more detailed look where I also demo a few of the more interesting high power fans from my collection.One of these is the newest EBM Papst DiaForce 120 model. It is a 120mm axial/centrifugal hybrid design. 500 watts, 17200 RPM, and over 12in H2O static pressure. It's definitely up there for crazy fans! Check it out:It is adjustable for PWM frequency, tachometer pulse counts, and rotary encoder direction. Just add a power supply of your choice. It can of course also handle normal 12 volt fans in most computer systems, and would be ideal for individual testing or manual control over high fan count arrays.Will release project files soon this week.Enjoy the vid!

author: nexus
author_rank: Regular Contributor
timestamp: November 06, 2023, 01:15:01 am
content: Project files are live:https://neonkev.com/2023/11/06/universal-high-power-4-wire-pwm-fan-controller/Watch your fingers!
Universal Battery charger - Page 1
Forum section: electronics / projects

author: jonwilhelmjr
author_rank: Regular Contributor
timestamp: March 21, 2012, 09:57:46 pm
content: OK so i want to start out by saying that i am by no means a electrical engineer or English person. this brings me to my idea that i am looking for some suggestion on or advise. i am going to college for robotics engineering and as i build many robot projects i run into the issue of having many batteries. i have several dozen AA batteries, AAA, D, C, 9V, 12V, 6V, 3V, . . . that vary from NIMH, NI-CAD, Alkaline, Li-po, or just lithium in general. OK so needless to say i have a lot of batteries and they go fast when you test motors. what i want to do is build/buy a battery charger that will work for all of these. if i could have it all automatic that would be nice but i understand that i would have to have some user interface. if any one is willing to respond with some suggestions with how i should go about this that would be great or even just point me in the right direction.

author: sonicj
author_rank: Frequent Contributor
timestamp: March 22, 2012, 02:45:05 am
content: LOTS to choose from... what's your budget? as would be expected, the higher quality chargers cost a bit more, but even the low cost multi-chargers can be quite nice.hobbyking is a well known vendor:http://www.hobbyking.com/hobbyking/store/__216__408__Battery_Chargers_Acc_-Battery_Chargers.htmlthe imax b6 and its clones are usually a safe bet and good starting point. the UI is a little cumbersome in my opinion, but certainly workable. they can charge all of the common chemistries and are available in various wattages.some things to consider: internal or external power supply, delta V & delta T terminations, charge rate, fan noise, balance lead breakouts, max number of cells, accuracy & resolution (see user reviews), etc.-sj
Universal case for LCD handheld device - Page 1
Forum section: electronics / projects

author: glatocha
author_rank: Regular Contributor
timestamp: January 26, 2015, 10:29:37 am
content: Hi,I am working on the device with graphic LCD. When I was searching for a case, I have found this cool case from one of the polish manufacturers:http://www.maszczyk.pl/en/offer/view/112/502/km-110Do you know any other cases like that. This one has the LCD screen a bit too big. I would need to redesign to use some other LCD or fill the gaps between LCD and the window somehow.

author: JoeO
author_rank: Frequent Contributor
timestamp: January 27, 2015, 10:48:31 pm
content: What size LCD screen do you have?

author: glatocha
author_rank: Regular Contributor
timestamp: January 28, 2015, 05:24:40 am
content: I plan to use this LCD from adafruit. 1.8"http://www.adafruit.com/product/358
universal customable SMPS for prototypes, final DIY etc - Page 1
Forum section: electronics / projects

author: strawberry
author_rank: Super Contributor
timestamp: December 14, 2017, 03:05:33 am
content: Is there any need for that thing ... could someone need that ?It could drive VFD/NIXIE display, RaspberryPi etc with single SMPSLow power SMPS ~50x80mm in size that features up to 4..5 output positive, negative or bipolar voltages, constant current optional mode for battery charging, ...Downsides: not certified..
Universal eeprom/falsh writer & logic ic tester construction - Page 1
Forum section: electronics / projects

author: cyberartem
author_rank: Newbie
timestamp: November 14, 2015, 04:31:47 am
content: Hello guys,I am an old fan of EEVblog but new to the forum , not sure if this is the right section to ask this.I am building an universal eeprom/flash programmer , logic IC tester, for 5v/3v only, i have few ideas.... and questionsIdeally i would like to be able to multiplex all 32 pins including supply voltage pins.The whole system will be controlled with a PIC micro and some software from the PC via UART communication.Currently i have two main questions.1) I am thinking to supply a voltage to an eeprom or a flash ic from 74hc573 for example.I checked the datasheet of 74hc573 and it can supply/sink about +-35mA which is kind of enough for writing some chips.Has anyone tried it ? I really don't want to put transistors on each pin2) I need to detect a voltage supply pins of the target ic , what is the best way to do it ?Can supply pins be detected by measuring current ? How can reverse polarity be detected while still not killing the ic ?Thanks !- Artiom.

author: ataradov
author_rank: Super Contributor
timestamp: November 14, 2015, 04:54:15 am
content: Quote from: cyberartem on November 14, 2015, 04:31:47 amHow do you plan to individually assign input and output functions?Quote from: cyberartem on November 14, 2015, 04:31:47 amImpossible. And most ICs will do something even without a proper voltage on the power pins as long as one of the inputs is high. The entire IC will be powered though the clamping diodes.You can assume some standard power pin positions first, of course. But the entire idea of auto-detecting a chip by providing voltages to random pins sounds rather dubious.

author: cyberartem
author_rank: Newbie
timestamp: November 14, 2015, 05:17:27 am
content: Thanks Alex, yep guess i will stick to pinout templates and will not complicate stuff.
Universal input 85-308VAC? - Page 1
Forum section: electronics / projects

author: Rory
author_rank: Frequent Contributor
timestamp: May 26, 2016, 01:14:40 pm
content: About the only place this rating shows up is with LED drivers. Web searches show no real explanation of how 308V is derived as an upper limit. The closest known line voltage associated with lighting is 277V in industrial applications, at least in the USA.Can someone shed some light on the subject?
Universal input Temperature sensor circuit ideas? - Page 1
Forum section: electronics / projects

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: January 13, 2018, 08:32:36 am
content: Hi,This is a picture from the Delta DT 3 series Temperature Controller, Do you recognize this chip? it's marking is 052B and I could find a 4052 analog switch for it! Am I correct on that? how do they implement the universal input type Temperature sensor circuit? it accept all kinds of Thermocouples, RTD, NTC , PT100 and input voltage configurations, the Board is connected to a R5F2l368CD MCU which has only a 10bit ADC and no fancy peripherals, Do you have any Idea?

author: danadak
author_rank: Super Contributor
timestamp: January 13, 2018, 12:50:17 pm
content: If you can get a manual for the controller usually there is achapter that explains operation and implementation.Regards, Dana.
Universal Micro to PC data visualiser - Page 1
Forum section: electronics / projects

author: ricko_uk
author_rank: Super Contributor
timestamp: January 23, 2020, 07:16:52 pm
content: Hi,are there any PC apps that:1) allow you to receive numerical data from serial or USB port and display it in real time on the PC in the form of a graph? (This is the main feature I am looking for)2) and maybe also display any other information after parsing the message string. I am clearly not taking about the standard COM/terminal apps that display all data.Thank you

author: rstofer
author_rank: Super Contributor
timestamp: January 23, 2020, 08:26:59 pm
content: Probably MATLAB, it does everything else!https://www.mathworks.com/matlabcentral/fileexchange/28941-real-time-data-plot-from-serial-portIf the script runs in MATLAB (and I didn't play with it), it might run in Octave which is FREE!Apparently, it can be done with gnuplot as well.

author: ricko_uk
author_rank: Super Contributor
timestamp: January 23, 2020, 08:33:50 pm
content: Thank you Rstofer,that's interesting, but not being familiar with Matlab I don't want to run the risk of having to invest too much time either learning it or customising it or sorting out bugs/issues. I was hoping for a out of the box type of solution. It must be a very common need for most engineers/developers.Thank you again for your feedback though!

author: HwAoRrDk
author_rank: Super Contributor
timestamp: January 23, 2020, 10:47:24 pm
content: The Arduino IDE has basic graphing of serial data. You don't have to be using an Arduino, you can just open the serial monitor and talk to any connected serial port.Multiple values can be graphed: just comma-delimit them on the lines of output.Edit: this link lists a few apps that may help.https://arduino.stackexchange.com/questions/1180/serial-data-plotting-programs

author: ricko_uk
author_rank: Super Contributor
timestamp: January 24, 2020, 12:46:16 am
content: Thank you HwAoRrDk,that's exactly what I was looking for and plenty of options too!

author: DaJMasta
author_rank: Super Contributor
timestamp: January 24, 2020, 06:10:21 am
content: Maybe take a look at a program called Processing.Similar to the Arduino IDE in setup and crossplatform, but lets you do GUI and data processing stuff (not analysis specific, just general programming stuff), but also includes a serial port interface library. I've used it for basic GUI displays for data from an arduino compatible chip over the USB port's serial connection.

author: nfmax
author_rank: Super Contributor
timestamp: January 24, 2020, 08:57:00 am
content: Node-REDhttps://nodered.org/is ideal for just thing kind of application. It has a graphical programming environment, lots of interfaces to all sorts of devices in addition to serial, and an easy to use 'dashboard' that you can place graphs, gauges, buttons etc., on and arrange to suit your needs. This displays using a web browser, so it can be accessed remotely if you want.Oh, and it's free (as in beer) too!

author: ricko_uk
author_rank: Super Contributor
timestamp: January 24, 2020, 02:18:17 pm
content: Thank you all!!
Universal modified sine wave inverter - Page 1
Forum section: electronics / projects

author: Keszi86
author_rank: Newbie
timestamp: June 30, 2024, 02:53:07 pm
content: Hello.I would like to connect the DC-DC converter in the first picture with the H-bridge in the second picture, with maximum 50 volts and potentiometer adjustable frequency. Can you help me if it is possible and what parts might need to be replaced?Thanks.https://ibb.co/ph8Frq1https://ibb.co/rd3yjnM
Universal Network Adaptor - Page 1
Forum section: electronics / projects

author: delphijustin
author_rank: Newbie
timestamp: April 29, 2013, 04:42:36 pm
content: heres my universal network cord, mine uses a special switch which non only can be crossover or straight-trew it can disconnect and be loopback, BUT THE CIRCUIT I GIVE YOU ONLY DOES CROSSOVER AND STRAIGHT TREW.Youtube videohttp://youtu.be/nFIyUfUTksE

author: mariush
author_rank: Super Contributor
timestamp: April 29, 2013, 05:05:02 pm
content: What the hell... what potato did you use to record that? Can't see anything in that video...Gigabit network cards will auto-detect the type of cable.If you really want to do something... get a small prototyping board with 0.1" holes, cut a small piece of it... get 4 jumpers and a 2 row 8 way headerO - OG - GWO - WOWG - WOO - GG - OWO-WGWG-WOWant crossover, just move the 4 jumpers to the bottom 4 positions.You can use some heatshrink to lock the wires to the protoboard and give it some strength, and in addition, you don't have to untwist the cable so much as to cause signal issues.jumpers with handlehttp://uk.farnell.com/te-connectivity-amp/881545-1/jumper-amp-modu-with-handle-0-4gold/dp/42181642 rows 8 contacts (picture doesn't match, it's same for 2 rows , x contacts) :http://uk.farnell.com/multicomp/mc34767/header-2-row-r-angle-8way/dp/1593450proto board (cut two columns with 8 rows) :http://uk.farnell.com/roth-elektronik/re310-s1/labor-card-cem3-3holepads/dp/1837352

author: mikes
author_rank: Regular Contributor
timestamp: April 29, 2013, 05:12:31 pm
content: You've got the idea, but the implementation isn't good. It won't work with gb Ethernet, which uses all 4 pairs. The switches (or even jumpers) will present a bump in impedance, so it's likely to cause errors, especially at 100 mb and long runs.Just get a crossover cable and use that when needed. Better yet, get a switch with auto MDI/MDI-X, so you don't have to worry about it.

author: delphijustin
author_rank: Newbie
timestamp: April 30, 2013, 03:09:24 pm
content: I guess for 1GB cables will need a 8PDT switch. So thats why my new laptop can hook to another computer in Straight-trew mode. Well it works pretty good, the switch i used is an old one. That might be a good idea using jumpers maybe when i get some i will make a video response.

author: mariush
author_rank: Super Contributor
timestamp: April 30, 2013, 03:28:03 pm
content: 1gbps cables don't need any kind of switching, the network cards and switches auto-detect the type of cable and work with any type of cable at 1 gbps.Network card to network card, network card to switch/hub, it doesn't need any messing about with the wires.

author: kripton2035
author_rank: Super Contributor
timestamp: April 30, 2013, 05:09:41 pm
content: it's been at least 10 years I don't bother anymore with cross or not network cables ! the cards do it alone.
University courses in embedded and electronics design - EC4760 - Page 1
Forum section: electronics / projects

author: brainwash
author_rank: Frequent Contributor
timestamp: July 03, 2013, 06:42:56 pm
content: This might have been posted a few times before but it should be in a sticky thread somewhere for all beginners (and not only) to see.https://www.youtube.com/user/ece4760/videosThese are the courses from the ECE4760 Cornell University module. The teacher is borderline informal and funny and provides a lot of insightful information making a delightful presentation.One of the previous courses was centered around ATMega368/328 programming with a lot of projects such as PID controller for a fan, video generation, polyphonic sound generation, etc. A must for any embedded programmer, though the coding style is a bit off for my taste.The previous module detailed FPGA design in Verilog.The current module deals with biological interfaces and discusses opamp design, Matlab processing, signal conditioning and other stuff which I haven't had time to watch yet. There are a lot of unexplored topics being discussed such as skin-area networks. I imagine tags for hacker conferences that exchange information when hands are shook.All in all, very useful information, a must-watch for beginner and medium level hobbyists.
University Robotics Club (Melbourne, RMIT) - Support? - Page 1
Forum section: electronics / projects

author: davidleverett30
author_rank: Contributor
timestamp: October 18, 2016, 11:45:18 pm
content: Hi all,I am currently enrolled at RMIT University studying EE.I've decided to start a robotics team in order to join robotic competitions around Australia.We have 7 members and there is growing interest in the group.After doing some beer coaster calculations, the parts seem to be pretty expensive.I've decided to reach out to different companies around Melbourne to see if they can support us (any kind of support - materials, equipment access, advice...etc)I would greatly appreciate any advice or contact information.Thank you!David Leverett

author: AlanR
author_rank: Regular Contributor
timestamp: October 19, 2016, 02:44:37 am
content: Have you checked surplus sources for parts? I've gotten lots of DC and brushless DC motors that would cost a lot, for just 10's of dollars. Check out Electronic Goldmine, All Electronics, Surplus Center, and Surplus Sales. Never buy new stuff when the surplus market has everything a bot builder could ever want and it helps keep the stuff from being thrown out into a landfill.

author: danadak
author_rank: Super Contributor
timestamp: October 19, 2016, 01:36:03 pm
content: The core of the design is of course the UP. Consider PSOC.For me what stands out is -1) Routability2) Fast 12 bit SAR A/D and slow 20 bit DelSig3) DFB (Digital Filter Block) that is dual channel, handle FIR or IIR filters, or DFBcan be used as a GP fast processor block, sililiar to RISC block4) MSI logic elements GUI based and/or the UDB Verilog capability. Eg. the FPGAlike capability5) Onboard Vref6) DAC, IDAC, OpAmps (up to 4), comparator, mixer, switch cap, analog mux....7) LCDCOM, UART, I2C, I2S, One Wire, SPI, Parallel, LIN, CAN, BLE9) Custom components capability10) DMA to offload processes like filters11) ARM M0 or M3 or 8051 core12) Extensive clock generation capabilitieshttps://www.element14.com/community/thread/23736/l/100-projects-in-100-days?displayFullThread=truehttp://www.cypress.com/documentation/code-examples/psoc-345-code-examplesGreat video libraryAttached component listFree GUI design tool with schematic capture, "Creator". Components have rich API library attachedto each componentThis is low end of family, consider 5LP parts as well. PSOC also has arduino footprint boards (pioneer) as wellhttps://www.elektormagazine.com/labs/robot-build-with-cypress-psochttp://www.cypress.com/products/32-bit-arm-cortex-m-psocContact the local sales office, "RSM", regional sales manager, and FAE as well, maybe they can give you some stuff as well.Never be afraid to ask. Even contact the Manufacturers Rep, sometimes they can have some boards laying around not beingused.Regards, Dana.
Unknown 8-pin IC with label ASZ6HA - Page 1
Forum section: electronics / projects

author: davorin
author_rank: Unknown
timestamp: May 22, 2025, 07:47:17 am
content: Good morningHave a bunch of 8-pin SOIC ICs here with just the label ASZ6HA on it.Someone has an idea what those could be?Google doesn't show any results for it.
[Solved] Unknown AC supply IC ASZBXA - Page 1
Forum section: electronics / projects

author: davorin
author_rank: Unknown
timestamp: March 10, 2021, 01:32:34 pm
content: Good afternoon (o;Does somebody know what type of 8-SOIC IC this is in a WiFi power plug?It is directly connected to a 3u3, 400V capacitor which is fed via a diode directly from the 230V AC main line...Looks like a switcher device to get 5V directly from AC line...Only marking I see is: ASZBXA

author: gamalot
author_rank: Super Contributor
timestamp: March 10, 2021, 02:02:42 pm
content: It's a SY50282FAC from Silergy.https://datasheet.lcsc.com/szlcsc/Silergy-Corp-SY50282FAC_C178237.pdf

author: davorin
author_rank: Unknown
timestamp: March 10, 2021, 02:06:52 pm
content: Excellent, thanks :-)Not my field those high voltages, except for old vacuum tube radios...but those are easier to repair/modify (o;

author: davorin
author_rank: Unknown
timestamp: March 10, 2021, 03:25:25 pm
content: Just in case someone is interested (o;The IC is used in a Marmitek Power SE WiFI Plug...hop eI got the schematic right to continue swaping the WiFi module with an ESP8266 to run ESPHome (o;https://github.com/richardklingler/marmitek/blob/main/pdf/power_se.pdf
Unknown bldc driver - Page 1
Forum section: electronics / projects

author: najrao
author_rank: Regular Contributor
timestamp: August 10, 2023, 12:35:32 pm
content: I have two of these unused, and want to drive a 250W 48V motor with Hall switches.Trouble is: there is no name on the board to Google out details. Reverse image search offered no joy.Motor and Hall switch connections are marked. The header on the left has pins wired toinputsof four opto isolators, andoutputof one more ditto. There are no other pin connections.There is a IR2130S driving the three phase mosfet bridge, two 74HC14D's and a GAL16V8D. A switcher for gate drive voltages, and a 7805 for 5V complete the picture. There isnoprocessor at all!It is possible that this board is part of a system and cannot be used by itself?I am hoping the picture rings a bell for somebody. Please help.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: August 10, 2023, 12:41:58 pm
content: It's a low density board and it looks easy to trace it out.It looks like data goes from inputs -> Opto's -> Gal (shoot through prevention?) -> TTL -> FET drivers -> Fets.So it's quite likely the raw phase input is put into this PCB.I don't know about the Hall switches input. If this board has direct phase input, then I would expect Hall switches to be connected to some other PCB. Maybe the Hall switches are encoded by the GAL into some feedback signal, just so the uC knows when it's time to advance to the next position, or the GAL does extra fault checking with it. The PCB does have a "FAULT" led.
unknown brand electronic components ? - Page 1
Forum section: electronics / projects

author: Ivica
author_rank: Newbie
timestamp: October 24, 2013, 07:34:18 am
content: Hi!After taking apart some chinese products apart i have noticed various components from some brand that i have never heard of - it's something like mirrored RLI include the picture of this brand bridge rectifier as exampleIf anybody has any info it would be cool to know!

author: andtfoot
author_rank: Unknown
timestamp: October 24, 2013, 07:57:41 am
content: That symbol is the UL (Underwriters Laboratories) Recognised Component mark:www.ul.com/global/eng/pages/corporate/aboutul/ulmarks/mark/marks-for-north-america/Whether it's real or not is anyone's guess...

author: wraper
author_rank: Unknown
timestamp: October 24, 2013, 07:58:28 am
content: Mirrored RL s not a brandhttp://en.wikipedia.org/wiki/File:UL_Recognized_Component_Mark.pngDiode bridge is made by DC components.

author: Ivica
author_rank: Newbie
timestamp: October 24, 2013, 09:55:51 am
content: Thanks!
Unknown Component - Page 1
Forum section: electronics / projects

author: electosleepy
author_rank: Contributor
timestamp: May 14, 2016, 11:06:52 am
content: I just wanted to know what is the name of the blue cap component on the top right of the Arty board that connects two header pins together?http://cdn6.bigcommerce.com/s-7gavg/products/471/images/3908/Arty_obl_2_600__25304.1458767764.1280.1280.png?c=2

author: cowana
author_rank: Frequent Contributor
timestamp: May 14, 2016, 11:11:30 am
content: It's a 2.54mm jumper.https://www.google.co.uk/search?q=2.54mm+jumper&oq=2.54mm+jumper&aqs=chrome..69i57j0.2393j0j4&sourceid=chrome&ie=UTF-8Andy
Unknown component - Page 1
Forum section: electronics / projects

author: vladimirmalic
author_rank: Newbie
timestamp: June 08, 2017, 07:47:47 pm
content: Hi all,Can you please help me to identify this component:Thanks in advance.

author: tatus1969
author_rank: Super Contributor
timestamp: June 08, 2017, 08:24:05 pm
content: could be that this is an exotic package for a LM313 reference diode. Do you have a diode tester, what does it say?

author: Zero999
author_rank: Super Contributor
timestamp: June 08, 2017, 09:37:32 pm
content: Is it flat or rounded on the other side? The picture isn't clear.How big it it? Perhaps show a rule next to it?

author: calexanian
author_rank: Super Contributor
timestamp: June 08, 2017, 09:40:03 pm
content: Well its got the big M on it so its Matsushitsa Panasonic.

author: wraper
author_rank: Unknown
timestamp: June 08, 2017, 09:41:52 pm
content: You should show where on the PCB you desoldered it from. In the wast majority of cases, just showing an obscure component without showing where it originated from, is useless.

author: CJay
author_rank: Super Contributor
timestamp: June 08, 2017, 10:33:46 pm
content: Matsushita PN313 photodiode.http://www.datasheetarchive.com.cn/pdf/download.php?id=5c5a7d6dc5e787e406112a6df2ba7673a499e1&type=P&query=WE%2B77%2FPN313

author: vladimirmalic
author_rank: Newbie
timestamp: June 09, 2017, 08:48:10 pm
content: Thanks to everyone, especially to CJay.Now it's redundant, but here you can find some better pictures, from both sides, near ruler. Diode test showing 0,573V.
Unknown component  - Page 1
Forum section: electronics / projects

author: atgeek
author_rank: Contributor
timestamp: August 14, 2017, 05:52:33 pm
content: I've found a 5V flip flop relay module which use just a 4 pin component for toggle the relay on and off, I've asked to the seller for a better front picture but there aren't any marking on it. Does anyone know what component or IC can it be?

author: DBecker
author_rank: Frequent Contributor
timestamp: August 14, 2017, 07:26:10 pm
content: The relay modules typically use an optoisolator as the drive transistor. But this is for a bistable relay module, using a standard relay.My guess is that they are using a specialized chip developed for flashlights, with human-scale debouncing driving a flip-flop and output MOSFET.

author: atgeek
author_rank: Contributor
timestamp: August 15, 2017, 07:47:15 am
content: Could it be this one? From the translation it should be a timer chip.

author: bjcuizon
author_rank: Frequent Contributor
timestamp: August 15, 2017, 07:51:01 am
content: Yeah, its probably a timer cause the silkscreen on the board says V (for vcc), G (for gnd), and T for timer???

author: zeqing
author_rank: Regular Contributor
timestamp: August 15, 2017, 08:27:47 am
content: a MOSFET, the "T" means "Trigger".. i think

author: Benta
author_rank: Super Contributor
timestamp: August 15, 2017, 09:01:12 am
content: I'd say "T" means "toggle".

author: DBecker
author_rank: Frequent Contributor
timestamp: August 15, 2017, 02:03:30 pm
content: It's not the toaster timer chip shown. The functionality is different, the pinout differs, and the chip on the module is able to drive the relay coil directly.I'm still going with a power toggle used on LED flashlights, although I couldn't immediately find a matching chip.

author: atgeek
author_rank: Contributor
timestamp: August 15, 2017, 06:28:38 pm
content: Would be really interesting know what kind of chip it is
Unknown connector challenge... - Page 1
Forum section: electronics / projects

author: Vicne
author_rank: Newbie
timestamp: April 10, 2020, 02:32:55 pm
content: Hi,I would like to pass the cable of my robot mower base station through a cable duct, but the factory cable is too short.As the connectors are crimped and I don't want to void the warranty, I'm looking for a pair of connectors to make an extender, but I have never seen such a connector:More hi-res pictures, with a metric scale, are available in this Google Photo album:https://photos.app.goo.gl/Ts1BB9jCBx1puyTS7Does anybody have an idea what standard it is, or where I could find one ?Any hint or comment would be greatly appreciated,Vicne

author: DC1MC
author_rank: Super Contributor
timestamp: April 10, 2020, 02:49:49 pm
content: Most likely a PDL TE variant, here's something similar for the panel, didn't spent to much time to look for the exact cable to cable version, but here's a starting point (it may even be compatible with what you want to do if you don't care about the panel locks):https://www.te.com/usa-en/product-2005249-9.htmlCheers,DC1MC

author: Vicne
author_rank: Newbie
timestamp: April 10, 2020, 08:08:27 pm
content: Wow, seems it is exactly what I was looking for, DC1MC, thanks !The precise plug model seems to be this onehttps://www.te.com/global-en/product-179463-1.htmland the socket sidehttps://www.te.com/global-en/product-177898-1.html.Now I just have to find them in Europe, but that won't be an issue.Edit : Digikey has them. Cool :-)Thanks very much !Vicne