hybridfree/eevblog-posts huggingface dataset:
Right Track on a Z180 8-bit homebrew? - Page 1
Forum section: electronics / projects

author: el_barto
author_rank: Newbie
timestamp: November 10, 2017, 04:19:41 am
content: Hi all,I've been planning on building an 8-bit retrobrew computer. First I chose z180 (specifically Z8S180 33Mhz) because it was one I could easily get online.Secondly I'm building it using breadboard (because it's easier than soldering 100 wires together, and I saw that other people had built breadboard-based 8-bit PCs) which entails using DIP packages and PLCCs (with DIP adapters).Right now I'm largely basing my design off of Phillip Stevens YAZ180 including using an APU and softprogrammer for the flash, but with some modifications.https://feilipu.files.wordpress.com/2017/02/yaz180_v2_schematic.pdfFor instance, instead of 2 GALs, I'm using a CPLD for memory and address decoding and memory mapping. Also, I couldn't find an FT232 or FT245 in DIP packages, so I bought them as break-out boards on ebay. I'm also adding an RTC and a QUAD UART chip (the XR16C854IJ-F) Good Idea?. I'm including the 82C55, but it will be used for GPIO instead of IDE. (Is that possible?).He uses an 8MB SRAM chip with 20 address inputs, but I was only able to find a 4MB SRAM chip in DIP package, which only has 19 address pins. (What do I do with the extra pin? Can I decode it using the CPLD?)Also, I know he uses caps and resistors in his design, but I'm confused as to where they go based on the shcematic. Anyone have any ideas.I have a CPLD programmer (using JTAG), but I'm not sure how to flash the rom. Even using the RT245, how is that done?Anyway, any input is much appreciated.

author: danadak
author_rank: Super Contributor
timestamp: November 10, 2017, 11:56:44 pm
content: For programming FLASH ROM one off I have found using an Arduino or othersimple processor and some code. Even used basic language in the past.Not elegant but fairly quick to create.Caps in this type of design typically a bulk cap in parallel with a ceramic.1 uF at the chip supply pins adequate. To handle noise and chip switchingtransients referred back to supply rails.Resistors generally pullups or pulldowns to terminate unused inputs or to seta startup state.Regards, Dana.
Right type of Digital Pot? - Page 1
Forum section: electronics / projects

author: echen1024
author_rank: Super Contributor
timestamp: September 15, 2013, 06:12:46 pm
content: So, in my quest to build a MCU controlled linear power supply, I have to decide whether to use a PWM signal for voltage adjustment, or a Digital Pot. For PWM, all I need is a LPF and it is fine. For a digital pot, however, I have no experience and need to know if this is the right kind. Would this intersil model work? I have never used these before, but have heard that digital pots allow for cleaner signals compared to a PWM voltage adjust. Any help would be much appreciated.Link:http://www.intersil.com/en/products/data-converters/digital-potentiometers--dcps-/dcps/ISL95311.html.

author: Dave
author_rank: Super Contributor
timestamp: September 15, 2013, 06:20:02 pm
content: Why don't you just use a DAC?

author: Marco
author_rank: Super Contributor
timestamp: September 15, 2013, 06:42:39 pm
content: Just get some 12 bit external DACs, MCP4725/6 costs 1$ in singles. If you don't want to float the MCU or if you want multiple galvanically isolated outputs you will have to connect them to the MCU through some sort of digital isolation though (ISO154X from TI or ADUM125X from Analog).

author: echen1024
author_rank: Super Contributor
timestamp: September 15, 2013, 07:07:37 pm
content: Quote from: Marco on September 15, 2013, 06:42:39 pmHuh. A DAC seems to work as well. Thanks for the tips.
Rigid-flex design example - Page 1
Forum section: electronics / projects

author: Glowas
author_rank: Newbie
timestamp: June 22, 2017, 09:27:53 pm
content: Hi All,I'm new here , and I would like get more details about rigid-flex design. I've never before design this kind of board, so if there is anyone who will be able to share rigid-flex board design file I will be gratefull ,really really appreciate for that. I can open Altium or OrCad file, so thank you for any example.Best regards
Rigol 800/900 with or without build in AWG  - Page 1
Forum section: electronics / projects

author: Wilson__
author_rank: Frequent Contributor
timestamp: September 10, 2024, 07:36:41 pm
content: Would you buy Rigol 800/900 osciloscopewith or without build in Arbitary waveform generatorwith auto bold plot?

author: moffy
author_rank: Super Contributor
timestamp: September 10, 2024, 11:02:22 pm
content: I got it with the AWG but the bode plot feature till now has been a bit of a disappointment. Search the 'test equipment' section of this forum.

author: thm_w
author_rank: Super Contributor
timestamp: September 10, 2024, 11:18:12 pm
content: - This is the wrong forum to post this question- Its been recommended many times that DHO900 is poor value, only buy a DHO804 if you are going to get one.Bode plot won't work on DHO800 unless you use external AWG + third party software, or get a SDS804X HD + AWG.
Rigol 832  output 12V/5A via CH1 + CH2 ? - Page 1
Forum section: electronics / projects

author: onesixright
author_rank: Frequent Contributor
timestamp: November 23, 2015, 05:20:22 pm
content: Hey Guys,I'm just checking something, i need 12V/5A power supply. My vendor forgot to send it, now i was thinking. If i use my Rigol 832 (max 30V / 3A per CH), connect CH1 + CH2 in parallel. Switch on the "track" function, set CH1 to 12V, it should deliver the 5A needed? Or am i missing something?Thanks!

author: Howardlong
author_rank: Super Contributor
timestamp: November 23, 2015, 05:40:08 pm
content: Quote from: onesixright on November 23, 2015, 05:20:22 pmIndeed, page 2-9 in the manualhttp://www.batronix.com/pdf/Rigol/UserGuide/DP800_UserGuide_EN.pdf
Rigol decode I2C - Page 1
Forum section: electronics / projects

author: frankhs
author_rank: Newbie
timestamp: November 16, 2014, 02:15:46 am
content: I just received my Rigol 2102 A scope and am trying to decode I2C data. How can I get the scope to capture more data so that I can scroll through it? I get the first few characters but I would like to get all of the message.I am familiar with a very old DSO and this one is new to me and has many features that I do not understand.The I2C data (ascii) is "ABC XXX " where XXX is a number that increments each time from 0 to 255. it is being sent from an arduino to a LCD display. I'm trying to learn to use the scope, not debug the hardware. The hardware seems to work as I can see the data on the LCD.

author: Kjelt
author_rank: Super Contributor
timestamp: November 16, 2014, 10:15:30 am
content: You set the timebase to higher timeframe and set the best I2C trigger for your situation, use single trigger. After it stopped you can zoom in with the timebase shuttle to find the correct piece you needed. But there is a limit to the total data stored. If you really need extreme large I2C captures you can better buy a dedicated I2C analyzer with lots of memory. Since those only store the I2C events digitally they handle much longer times.
Rigol DG1022 sends double pulse in burst mode! - Page 1
Forum section: electronics / projects

author: dsokoll
author_rank: Contributor
timestamp: February 18, 2012, 08:35:51 pm
content: So i needed a pulse with a width of 1ns, which my DG1022 can not do. So i decided to use the DG1002 as an external trigger to an HP 1900A which will get me close enough. During the 16 pulse test, my frequency counter showed we were getting 17 pulses. After play around and blaming it on the HP's age, we discovered the Rigol DG1022 being used as an external trigger was sending an extra trigger pulse. After the first pulse, it was sending a second pulse 1ms behind it followed by the remaining 15 100ms apart making the 10Hz rep rate. Anyone else seen this problem? Attached are photos using a 5 pulse burst as an example. The first looks to be 5 pulses...a closer look proves different.

author: Thomas
author_rank: Regular Contributor
timestamp: February 19, 2012, 10:49:09 am
content: Mine does the same thing when using Manual trigger.Looks fine when using Internal or External triggerNot good

author: dsokoll
author_rank: Contributor
timestamp: February 21, 2012, 07:21:03 pm
content: I notified Rigol Tech Support and they never responded. Very disappointed. I have a scope, DVM and power supply from them as well.

author: Fender123
author_rank: Newbie
timestamp: August 20, 2014, 08:28:59 pm
content: I recently encountered the same problem with manual trigger of pulses or bursts - it only happens from the second manual trigger event onward. A single long pulse will have a leading glitch, a short fast burst will appear twice, and a long fast burst will be extended (by about 1.8ms).Setting Burst->Delay to 2ms solved the problem for me in all cases.
Rigol DHO804 Stand alone remoting application - Page 1
Forum section: electronics / projects

author: UIQ
author_rank: Newbie
timestamp: April 25, 2024, 05:02:36 pm
content: Rigol DHO804 Stand alone remoting applicationFor anyone interested, I have developed a simple WinForm application based on Cromium libraries to remotely access my DHO804 (let me know if it is compatible with other RIgol devices) without using a browser, and it has some added features:Freely resizableStay on topAutostart with windowsAuto open when the scope is detectedUser definable hot-key to take screenshot directly to PC folderInverted colors both for live scope and-or screenshotsThe files can be downloaded athttps://mega.nz/folder/0nJT2DhD#rk2YJuiiPHMHbMjVQ-43tQI apologize for the file size that was caused by the cefsharp libraries.

author: moffy
author_rank: Super Contributor
timestamp: April 25, 2024, 10:54:08 pm
content: Thanks for the application.
rigol dm3058 windows software - Page 1
Forum section: electronics / projects

author: charliex
author_rank: Frequent Contributor
timestamp: October 10, 2016, 01:03:24 am
content: i picked up a dm3058 didn't realise the software was additional and i didn't even get to try it since i couldn't find the trial that is shown. so i started to hobble together my own one.tested on windows 7 x64 with NI Visa, this is still a proof of concept just to see how funky this is since all the other NI VISA software i've used is equally bad, and this is an hour of work, so don't expect a lot. uses rigol mode, lots left to do etc,. ranging mostly works, auto works, sensor no, measure.math/trig/help/save/utility no .... searches for 0x1AB1::0x09C4 device.https://github.com/charlie-x/x3058Eand crap yes i already forgot something, uses thishttp://www.dafont.com/alarm-clock.fontfont..ttfn

author: vy73
author_rank: Newbie
timestamp: December 01, 2016, 12:50:27 am
content: Hi,I'm a user and have no clue about coding, but I like to thank you already for your efforts. I am also looking for affordable and useful software for my DMM and did not find anything.Especially for logging purposes of long-term measurements I found nothing except the very limited Excel file on the Rigol website..I appreciate your work a lot.

author: dssence
author_rank: Regular Contributor
timestamp: September 26, 2020, 12:20:09 am
content: Hi charlie , excellent I did a thread asking if there was some application I could use for on screen display on windows as I mostly do repairs. And I need an application so I can use with OBS software to show on screen all my measurements. But I will be buying rigol DM3058-E will it work for that one? . so thankful for your effort.
RIGOL DP832 Precision Upgrade - Page 1
Forum section: electronics / projects

author: broderp
author_rank: Regular Contributor
timestamp: April 17, 2015, 02:41:33 pm
content: I just purchased the RIGOL DP832 with the intention at some point of buying the precision upgrade. I saw David's video from a year or so ago really liked this option as it just added the precision and extra digit to the display.I do not want or like the 832A's color tri-looking/confusing display.I went to TEquipment just to see the new list price of this upgrade for the 832 and the image shows the 832A color display.Has anyone bought this upgrade recently and is it truly the 832A displayor the same display as David's video shows?Thanks.

author: PA0PBZ
author_rank: Super Contributor
timestamp: April 17, 2015, 02:48:15 pm
content: You keep the same display, it just adds a digit.

author: broderp
author_rank: Regular Contributor
timestamp: April 17, 2015, 03:17:37 pm
content: Quote from: PA0PBZ on April 17, 2015, 02:48:15 pmWell that's good news, thanks.
Rigol DP832 question - Page 1
Forum section: electronics / projects

author: alank2
author_rank: Super Contributor
timestamp: September 16, 2016, 09:32:58 pm
content: If I go from 30V to 5V, I noticed that the current spikes up to a few hundred mA briefly. It once was enough to trip the overcurrent I had set to 350mA. Is this normal? I had it connected to a scope and was testing the output. You could see it move from 30V to 5V not instantly but with some delay... Any thoughts?

author: rstofer
author_rank: Super Contributor
timestamp: September 16, 2016, 10:03:58 pm
content: Charging and or discharging the output capacitors?

author: Kleinstein
author_rank: Super Contributor
timestamp: September 17, 2016, 07:42:37 am
content: Some delay is normal as this is a power supply and not a signal generator for fast signals. It already takes some time to discharge the output capacitor.Going down that much would cause a change in transformer tap, may be even more than one step. This might be the cause for an upset - should not happen, but a cap at the low end might be all it takes. I would also think the current comes from charging the output cap - so there should also be a dip in the output voltage, so the current spike would be consequence of the voltage dropping too much.

author: alank2
author_rank: Super Contributor
timestamp: September 17, 2016, 02:48:19 pm
content: So I put a current meter in between and sure enough, this current is not at the terminals, but internal.

author: rstofer
author_rank: Super Contributor
timestamp: September 17, 2016, 04:06:12 pm
content: Sure! Capacitor current i(t) = C dv/dt. If C is large, dv is large and dt is small, the current can get up there.

author: saturation
author_rank: Super Contributor
timestamp: September 17, 2016, 04:06:49 pm
content: I can only speak theoretically, I do not own this unit.The output cap has to be discharged down to obtain the new set voltage. In common designs the bleeder resistor is across the output cap so this is done passively.If there is no output resistor of any type then the design must switch a bleeder in, and it may appear internally as a current spike until the regulator stabilizes the output to your setting. There are many reasons for the spike to happen, such as the regulator circuit seeing too rapid a discharge of the output cap and attempts to pull it up to reach your set voltage.So long as this current does not appear on the output, your UUT is safe, however, if this is not a bug or a design flaw, its still undesirable since the PSU's meters should always represent the status of its outputs, not what may be happening internally.
RIGOL DS1052E - Page 1
Forum section: electronics / projects

author: Aigars
author_rank: Regular Contributor
timestamp: April 20, 2014, 08:57:56 am
content: Hi. I can not find may first topik, sou i make a new.1. i need find 02.02.freeware for ds1052e.for downgrading from 04.01 to 02.022. when i get 02.02 i can tray hack may scope and make ds1102e.3. i need mor corect info about this hack. i lok in forum, but i misunderstud this.please help me make dan this.

author: Aigars
author_rank: Regular Contributor
timestamp: April 20, 2014, 03:48:54 pm
content: please, guys help me samone.

author: Simon
author_rank: Unknown
timestamp: April 20, 2014, 04:49:31 pm
content: You have already asked this question TWICE. repeated posts will not get an answer just annoy everyone. the answer is all over the internet in fact. Another post asking this same question will get you banned for life !
Rigol DS1054 remote viewer/controller - Page 1
Forum section: electronics / projects

author: ynfo
author_rank: Contributor
timestamp: May 25, 2021, 10:50:21 am
content: I wanted a simple Windows 10 based DS1054 viewer that would work over a LAN and not need VISA etc software installed so I repackaged some old software as a UWP app.If anyone is interested you can download it here:https://www.microsoft.com/store/apps/9NPPVW8MWZW6More details at:https://ynformatics.com/2021/rigol-ds1000-ds1054-viewer-controller/Here is a screen capture of it in action:https://youtu.be/fi2EKEY6O68Let me know if you find any bugs etc,Paul

author: jord4231
author_rank: Regular Contributor
timestamp: June 28, 2021, 11:54:58 am
content: super nice, Thank you!
Rigol DS1054Z: Frequecy Counter Quirk or Technical Effect? - Page 1
Forum section: electronics / projects

author: Darkwing
author_rank: Contributor
timestamp: October 30, 2018, 01:18:23 am
content: Hi Folks!I now own a new Rigol DS1054Z oscilloscope and I did some measurements. I measured the output of a transformer (230VAC to 12VAC) and I was expecting the 50Hz sine wave (Europe). It was there, but the frequency counter showed some weird value:Can someone explain, why the counter is so wrong this time? With other measurements it was pretty spot on. What can be the reason? It also recongizes the 50Hz on input side correctly.Thanks!

author: ataradov
author_rank: Super Contributor
timestamp: October 30, 2018, 01:37:27 am
content: Hardware frequency counter measures direct trigger output, which is not filtered. Enable 20 MHz bandwidth limit on the channel and the result is likely to change.

author: Darkwing
author_rank: Contributor
timestamp: November 01, 2018, 01:17:13 am
content: Hm, as I recall, I had that option enabled. I switched between 20M and OFF and 20M ... it didn't change a thing.But even if it had chaged the readings of the frequency counter: the question is: what in a simple transformer could cause the 50Hz signal to go crazy like that?

author: ataradov
author_rank: Super Contributor
timestamp: November 01, 2018, 01:26:40 am
content: Hard to tell. Try moving trigger level up and down. This is related to the way trigger system interprets this signal.

author: alsetalokin4017
author_rank: Super Contributor
timestamp: November 01, 2018, 01:33:30 am
content: Quote from: Darkwing on November 01, 2018, 01:17:13 amYes, in the screenshot above you have Bandwidth Limiting selected. You can tell by the "B" in the Channel 2 vertical setting box at lower left.Try setting the Trigger Source to AC. (in the front panel Trigger section press Menu > Source > AC )

author: Thomas
author_rank: Regular Contributor
timestamp: November 02, 2018, 07:02:42 am
content: Try triggering on an edge.It looks like you have some kind of pulse triggering in the picture.
Rigol DS1074Z /Capturing Screen Image to PC - Page 1
Forum section: electronics / projects

author: ats3788
author_rank: Contributor
timestamp: May 12, 2014, 07:23:30 am
content: HelloI fiddle a little bit with Visa32.dll and Delphi, I wrote a Program very basic. and it is working.I someone is interested, Iwill post it.AnywayIs there a possibility to get the Screen Bitmap to your PC ?Have a nice DayMartin Michael

author: michaelym
author_rank: Regular Contributor
timestamp: May 12, 2014, 02:03:32 pm
content: Yes I would be interested. although I was able to capture with the supplied software "Ultra Sigma" but a simplified method would be better.BTW I could not find any PC user interface for the scope like Rigol has in other scopes.
Rigol DS1102E data transfer demo program - Page 1
Forum section: electronics / projects

author: poida_pie
author_rank: Regular Contributor
timestamp: October 12, 2012, 12:21:30 pm
content: Hi allI spent a happy day playing around with my Rigol DSO and PC.I now have a demo program that gets 16K byte data from the Rigol and does a FFT then shows the results.This was mainly to prove that data could be sent to a PC and also to have a think about usescould be made of this.So, see the below link for a download. The zip archive contains the demo program I made, plus VB6 source project files,the NI VISA runtime driver and some excellent reading. Two pdfs are included, the programming guide from Rigol for DS1000 series beasties as well as the programming guide for NI VISA.The demo proggie works fine with me. I tested it on an HP Core 2 Duo desktop running XP-Pro and a Vmware VM running XP-Pro, hosted on an iMacIt seems worth sharing and hopefully I can become more educated about signal processing. I know nothing as it stands but maybe this could show how you get data from the DSO.I found that the dynamic range of the data is from 0x0f to 0xe0 inclusive. I expected 0 to 0xff but maybe some bitsof each byte are used internally by the scope....The demo can process the 16K capture in about 0.1 second, but the slowness comes from transferring from scope to PC. I use blocking I/O and so I wonder if there is a better way that is possible.Read the readme in the archive and have at it.find it athttp://www.bqdesign.com.au/rigolfftdemo.zipI don't know if I can send 5 Mb attachments here, so I host it remotely.check out a sceencap.time for beer.Peter
Rigol DS1102E trigger offset irregularity on single sweep - Page 1
Forum section: electronics / projects

author: AussieBruce
author_rank: Regular Contributor
timestamp: April 13, 2022, 03:02:36 am
content: Hi, I’m trying to catch isolated events on my Rigol DSO with triggering set to Single sweep, when an event occurs there is no sign of it in the trace, even when I use the horizontal scroll knob to search from end to end. The events are around 1mS in duration, with a voltage of about 3 volts, so nothing extreme. When I adjust things so there is a continuous stream of the events, and with triggering on auto everything works fine.My suspicion is on a field at bottom RHS of the screen in orange, “T -> 51.64mS”. I’ve hunted through the manuals, and can’t find a clear description of what this is, but I guess it might the ‘trigger offset’ briefly mentioned in the doco, if so then a delay like this could force my single shot view off the screen. Despite lots of messing with the menus I can’t see any way of changing this value. Can anyone assist? In general, the Rigol doco seems a bit patchy.

author: Romualds
author_rank: Contributor
timestamp: April 13, 2022, 06:41:46 am
content: 1. What kind of events have to be caught? You write about 1ms duration and 3V but is it a pulse, edge (rising, falling, both), slow ramp or anything else you are looking for?2. What are the current trigger settings?
Rigol DSA815-TG - Page 1
Forum section: electronics / projects

author: w3amd
author_rank: Regular Contributor
timestamp: February 24, 2016, 03:30:55 pm
content: Hi all,Is it possible to use this to measure impendence of a circuit? I want to measure a cabinet chassis in particular and look at the impedance for a few frequencies.The test:1) Use tracking generator output between two different points on the cabinet.2) Use spectrum analyzer to measure the difference across these two points.In the worst case the tracking generator output might be near short at some frequencies. Can it handle this? Or should I put a 50 ohm resistor in series with the tracking generator output?Is there a better way?TIA,John

author: Paul Rose
author_rank: Regular Contributor
timestamp: February 25, 2016, 02:05:40 pm
content: You want to drive the DUT with the TG and sample it from the same point? Treating the DUT like a shunt (higher response means higher impedance, less loading)?I guess it could work.I'd put a 10dB attenuator on the TG output ( and maybe another one on the SA input ), and then do a normalization without the DUT. Then work out the math for how to interpret the resopnse as impedance.>>Is there a better way?I'd use a Directional Coupler ( Return Loss Bridge ) like the Mini-Circuits ZFDC-20-5.See Alan's video:Or this one from James Edgerton:
Rigol or Agilent Gear for PC control? - Page 1
Forum section: electronics / projects

author: envisionelec
author_rank: Frequent Contributor
timestamp: December 31, 2013, 03:31:50 am
content: I'm outfitting my lab with a new semi-automated test system. Ideally I'd like to control it using VBA in Excel. I wanted to use Rigol equipment for such tasks, but from my vantage point, it appears Agilent has this application nailed complete with sample code and/or sequence wizards. Have I missed something? Do you have any suggestions?

author: Kohanbash
author_rank: Regular Contributor
timestamp: December 31, 2013, 03:22:09 pm
content: I have never used the Rigol hardware but I have used the Agilent hardware logging to a PC and been happy with them.

author: qwaarjet
author_rank: Regular Contributor
timestamp: January 01, 2014, 03:43:27 am
content: I have a Rigol DS4024 and have had problem when transferring more than 50,000 pts I have never been able to transfer the full 140Mpts memory but if all you want to capture is what on the the screen it works well enough. As far as controlling channels and triggers control was fairly easy. Control was done LabVIEW over USB

author: mcinque
author_rank: Unknown
timestamp: January 01, 2014, 10:18:58 am
content: I have Rigol HW and their software simply sucks.

author: plesa
author_rank: Frequent Contributor
timestamp: January 01, 2014, 10:34:27 am
content: Quote from: envisionelec on December 31, 2013, 03:31:50 amIt depends how complicated your setup will be, But nobody knows what you will need in few months.Consider there is no Rigol support available at all. Tek and Agilent has forum where they help you to resolve reported issue.TEK offer free version of NI Signall express with their instruments and Agilent provide Command express.

author: mikeselectricstuff
author_rank: Super Contributor
timestamp: January 01, 2014, 11:21:43 am
content: Although Rigol are about the best Chinese supplier, the general standard of software quality from China is poor, and once it is working enough to ship, you're unlikely to see any updates, or get any support - all they care about is shifting boxes.Things like remote control are a minority feature and you can't expect any serious effort to have been put into testing. Even once bugs are found by users in the field, fixes will be a long tome coming, if they come at all.Agilent have decades of experience making instruments, and much of the software will be shared over a wide range of models, and their support is generally good.
rigol pl2302 drivers+ win 10 - Page 1
Forum section: electronics / projects

author: p.larner
author_rank: Frequent Contributor
timestamp: October 31, 2023, 02:39:47 am
content: for folks having issues with fake ftdi drivers and win 10 this was an issue i had trying to get baofeng programing cables to work,It may help others

author: coromonadalix
author_rank: Super Contributor
timestamp: October 31, 2023, 08:25:24 am
content: BUT PL2302 if a ProlificAnd some of them are not compatible anymore on win 10, you have to get some or change chipset models ....For the fakes FTDI if you get busted, you need FTDI FTPROG to repair them, change back / re create your VID / PID and use older FTDI versions 1.2.10 if i recalland stopWin10 drivers updatesIt was widely known as FTDI gate ...
Rigol Ultra Station software alternative - Page 1
Forum section: electronics / projects

author: ricko_uk
author_rank: Super Contributor
timestamp: August 13, 2020, 06:58:12 pm
content: Hi,I have a Rigol DG1032Z sig gen. To make custom waveforms they provide their Ultra Station software. But it is extremely user unfriendly and counter intuitive.Are the any alternatives?Thank you

author: Renate
author_rank: Super Contributor
timestamp: August 14, 2020, 06:35:25 pm
content: Mmm, write your own?Is the protocol documented? Is it SCPI?Use a software or hardware USB protocol analyzer to see what gets sent.Or reverse engineer the saved waveform file format and attack it from that end.

author: ricko_uk
author_rank: Super Contributor
timestamp: August 17, 2020, 11:51:26 pm
content: Thank you Renate
Rigol USB-Protocol - Page 1
Forum section: electronics / projects

author: krater
author_rank: Regular Contributor
timestamp: October 07, 2012, 12:56:46 pm
content: hi,i want to write a hardware integration for sigrok for the rigol ds1xxx scopes. is there anyone who has some informations about the usb protocol ? any reverse engineered things or docs ?cheers,krater

author: jeremy
author_rank: Super Contributor
timestamp: October 07, 2012, 01:05:59 pm
content: no need to reverse engineer, there is plenty of info online. Here is something my friend and I hacked together to make a scalar network analyser out of a rigol scope and function gen:https://github.com/smitec/magneto/tree/master/RigolControlEverything was done using USBTMC and the rigol programmers manual.

author: krater
author_rank: Regular Contributor
timestamp: October 07, 2012, 01:21:31 pm
content: hey okay, thank you.looks like the serial protocol...i didn't know that it's completly the same...for completeness, here is a link to the manualhttp://www.batronix.com/pdf/Rigol/ProgrammingGuide/DS1000DE_ProgrammingGuide_EN.pdf
RII micro keyboard - can you convert it to wired usb - Page 1
Forum section: electronics / projects

author: alank2
author_rank: Super Contributor
timestamp: March 19, 2017, 01:42:36 pm
content: I've got one of these:http://www.ebay.com/itm/Rii-X1-Mini-2-4GHz-Black-Wireless-Keyboard-with-Mouse-Touchpad-Remote-Control-/111821091071?hash=item1a090e70ff:g:snMAAOSwnHZYm7ifIt charges using USB, but operates wirelessly using a small keyboard dongle that you plug in.Has anyone taken one of these apart? I would like to convert it to a USB wired keyboard.

author: 128er
author_rank: Regular Contributor
timestamp: March 19, 2017, 02:24:38 pm
content: I have one of these keyboards. I will take a look inside.I'm not a RF/wireless guy, but one crazy thing comes to my mind. Would it work to wire the antennas of the keyboard and the dongle directly together, maybe with some sort of attenuator between? WiFi over wire so to speak

author: 128er
author_rank: Regular Contributor
timestamp: March 19, 2017, 03:13:10 pm
content: Chipset is BEKO BK2433 2.4GHz Wireless SoC. The other chip is labled "EST ES928 B351G0837G3". Some sort of capacitive touch IC with I2C interface, or a microcontroller with these capabilities.The BK2433 in QFN-56 has no USB interface. There is an BK2423 is QFN-24 with USB interface. But the chip must be configured for that, I don't think that it magically apears as a USB keyboard when connected.http://www.datasheetspdf.com/datasheet/BK2433.html

author: 128er
author_rank: Regular Contributor
timestamp: March 19, 2017, 03:15:52 pm
content: Last image.Edit:The header footprint J4 is VDD, GND, VPP_PROG, MISO, MOSI, SCK, CS. The 8th pin I could not find. Could be unconnected or on an inner layer. And the chipset is one time programmable.

author: amyk
author_rank: Super Contributor
timestamp: March 19, 2017, 04:15:42 pm
content: You always have the option of figuring out the key matrix and connecting your own USB microcontroller. There's various keyboard firmwares floating around on the Internet that AFAIK you just need to give it the keymap and they'll work.

author: 128er
author_rank: Regular Contributor
timestamp: March 19, 2017, 04:57:54 pm
content: Quote from: amyk on March 19, 2017, 04:15:42 pmYes, that would be the obvious DIY tinkering method. If the OP realy want to convert this keyboard, that is the way to go. But would it be worth the effort?Haven't looked on Ebay. But I'm pretty sure that there are readily available keyboards with USB in this form fatctor.Btw, I use my RII keyboard for my raspberry. For doing quick things it's ok, but for longer use I find them a PITA to type with them. And the function keys only goes up to F8.

author: PA0PBZ
author_rank: Super Contributor
timestamp: March 19, 2017, 05:05:21 pm
content: Just leave the USB cable connected and the dongle in the pc and call it wired

author: Hideki
author_rank: Frequent Contributor
timestamp: March 19, 2017, 08:08:14 pm
content: Put the dongle inside the keyboard and wire it to the USB connector.
Ring Clock - My new clock - Page 1
Forum section: electronics / projects

author: ColdKeyboard
author_rank: Contributor
timestamp: November 12, 2018, 03:58:02 am
content: Hey everyone! I wanted to share my latest project that I did for myself, then my friends saw it and wanted one as well; so what I did wasdesigned a custom PCB, hacked together some firmware and based on feedback, people like it very much.I've posted why I did it, how I did it and all of the source files on my website (https://sasakaranovic.com/projects/ring-clock/).This is the idea that I had for a while; replace my mechanical clock that is awesome, but hearing it go tick-tock at 1AM is annoying, with something that lookslike mechanical clock but make no sound.So I took some WS2812 LEDs that I had laying around, got the STM32F103, soldered some wires and that was it for the prototype.Please let me know your thoughts. Also I was thinking about giving away some of the PCBs but they have all gone before I even got the chance tofinish writing the blog post. But if someone would like one, you can download gerbers and order from Seeedstudio, OSH or any other PCB fab house.

author: ColdKeyboard
author_rank: Contributor
timestamp: November 14, 2018, 04:57:40 am
content: No feedback at all? This makes me so sad

author: JackJones
author_rank: Regular Contributor
timestamp: November 14, 2018, 05:08:15 am
content: I thought it's pretty neat. I did in fact think of doing one myself after seeing this.It's a little bit hard to read though at a glance. Perhaps having an inner led ring with 48 leds to show the hours could improve on that?

author: ColdKeyboard
author_rank: Contributor
timestamp: November 14, 2018, 03:38:15 pm
content: Quote from: JackJones on November 14, 2018, 05:08:15 amThank you!I thought about adding more LEDs will make it just look more busy and maybe even more confusing, so I opted for not doing that.Also I noticed that people who had difficulty reading it or even understanding that it's a legit clock, once you explain it to them and they checkit a few times they get used to it pretty quickly and then like it even more.

author: Audioguru
author_rank: Super Contributor
timestamp: November 14, 2018, 04:34:09 pm
content: All my clocks show numbers, not lighted LEDs. My simple chaser circuits show lit LEDs.
ring modulator - Page 1
Forum section: electronics / projects

author: RMmod
author_rank: Newbie
timestamp: November 29, 2014, 11:45:38 pm
content: Hello all,I need help designing a ring modulator for AM(DSB) instead of DSB-SC..ANY help would be greatly appreciated!!ROMI

author: Howardlong
author_rank: Super Contributor
timestamp: November 30, 2014, 12:16:29 am
content: I apologise in advance if I am wrong, but if this is a homework question could you please give the entire question, because I don't quite understand what's being requested. If it's a real life question, please expand on the detail as to what you're trying to achieve.

author: RMmod
author_rank: Newbie
timestamp: November 30, 2014, 12:22:51 am
content: THanks Howardlong!!This is indeed a homework question and I really need to get this done on Multisim..Than I can demonstrate on breadboard though.Ring modulators are used for DSB-SC generation as common practice but we are required to transmit AM (DSB) through modified ring modulator !!Thanks again

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 30, 2014, 01:04:14 am
content: Ooh, LaTeX. A professor who cares.AM is done with a single or dual quadrant mixer, not a four quadrant mixer. If you must use a ring modulator, you can add carrier back in... which seems pointless. The whole reason to choose a DBM is because it affords some carrier rejection.Preferably, you'd use a single balanced mixer (two diodes, or even better, a long tailed pair like this:http://www.classiccmp.org/rtellason/chipdata/ca3028.pdf).Tim

author: RMmod
author_rank: Newbie
timestamp: November 30, 2014, 01:55:45 am
content: can you draw it please TIM

author: T3sl4co1l
author_rank: Super Contributor
timestamp: November 30, 2014, 02:12:09 am
content: Afraid that'd be doing your homework for you...Read the textbook and note the difference between AM and DSB-SC. Then read about adding voltages, or superposition, etc.Tim

author: RMmod
author_rank: Newbie
timestamp: November 30, 2014, 02:23:36 am
content: I understand your concern....I have built something on Multisim but couldn't really move forward.....Please take a look at it..attached file for reviewThanks again.
Ring Steplight - Page 1
Forum section: electronics / projects

author: RABeng224
author_rank: Contributor
timestamp: March 03, 2020, 02:04:56 am
content: One of my Ring steplights recently stopped working. I decided to take a peek under the hood. I was shocked at the lack of quality. There is flux residue all over and poor soldering left and right. For a mass consumer product I expected much better. They kept the SWD debug header for the Nordic nRF52 micro. I’m going to see what I can pull out of it. They left the standard Nordic UART over BLE services active too. Seems like a “don’t care if it’s ready, start selling it” scenario.

author: Zero999
author_rank: Super Contributor
timestamp: March 03, 2020, 11:35:07 am
content: It looks fairly decent quality for a mass manufactured consumer product. I've seen much worse before. Big solder blobs and loads of flux is fairly standard for cheap consumer electronics.Do you have any more information such as the make and model number?
RIP Joel Spira, founder of Lutron and inventor of the thyristor dimmer switch - Page 1
Forum section: electronics / projects

author: bigsky
author_rank: Regular Contributor
timestamp: April 14, 2015, 07:11:45 pm
content: I just spotted this on wikipedia - he died on 8 April - worth reading his story.http://en.wikipedia.org/wiki/Joel_Spira_(businessman)http://www.cepro.com/article/lutron_joel_spiras_inventions_make_peoples_lives_better/K317

author: Alex Eisenhut
author_rank: Super Contributor
timestamp: April 14, 2015, 08:16:15 pm
content: It's always interesting to see the things we take for granted and what's behind them. I love the fact that this started in the 1960s. Very nostalgic for this era.
Rip-off of the uCurrent? - Page 1
Forum section: electronics / projects

author: rs20
author_rank: Super Contributor
timestamp: September 19, 2017, 03:37:54 am
content: I was surprised to see this suspiciously-named device mentioned in Jack Ganssle's newsletter, "The Embedded Muse":http://www.cmicrotek.com/uCP.htmWho had the name first? Did t'other not Google it?The specifications site is also pretty terrible; absolutely no mention of bandwidth (only when you dig into the datasheet does it admit a bandwidth of 550kHz); only two ranges instead of the three offered by Dave's uCurrent, and a "zoom" mode that is advertised using the following description:QuoteHow does attenuating the signal 10x increase the dynamic range? Why not leave it in "10x" mode all the time and just use the vertical zoom of the oscilloscope, which has the added advantage of keeping measurements and cursors in a consistent state? What relevance does an ADC being 8 bit have when almost every oscilloscope in existence has its own programmable attenuators/amps?I dunno, seems really dodge to me all around. Am I missing something?

author: ataradov
author_rank: Super Contributor
timestamp: September 19, 2017, 04:17:53 am
content: This was already discussed. I think those things came before uCurrent. EDIT: Although I can't find any references to it prior to 2014, which would put it 5 years after uCurrent./10 mode is to increase measurement range, same as 10x scope probes.

author: EEVblog
author_rank: Unknown
timestamp: September 19, 2017, 04:22:49 am
content: My uCurrent came out in April 2009He claims "µCurrent Probe" as a Trademark, and I claim simply "µCurrent", his was released in 2014 (it was an IGG campaign) and he claims to never have heard of mine before that date, even though it dominated Google results for that kind of thing.He used to have a disclaimer on his page that said it wasn't affiliated with mine, but now seems gone?

author: ataradov
author_rank: Super Contributor
timestamp: September 19, 2017, 04:24:06 am
content: Yes, the whole domain is registered in 2013, so even if it existed before that, it was not at that address.
Ripped parts off a laptop battery protection board. What can I do with the parts - Page 1
Forum section: electronics / projects

author: technix
author_rank: Super Contributor
timestamp: May 15, 2015, 08:46:00 pm
content: Interesting parts besides passives and diodes after hot air gun action on the battery protection module:* TPC8017H power N-MOSFETs in SO-8 package (2x)* Benchmarq battery management chipset, 2 30-pin 0.5mm TSSOP packages*And please ID those for me as Google turned out not so useful:* An unknown 8-pin 0.65mm TSSOP chip marked "CEF G72"* A 3-pin SC-70 chip marked "KK9"* Two 3-pin SC-70 chips marked "Y C"* A weird package marked "SEFUSE D6X77C"

author: smjcuk
author_rank: Frequent Contributor
timestamp: May 15, 2015, 09:01:20 pm
content: The SEFUSE are thermal fuses. Should have a "I'll never work again after this many oC" rating on them. They're pretty cool. Although if you used a heat gun, they're probably buggered.

author: technix
author_rank: Super Contributor
timestamp: May 15, 2015, 09:41:06 pm
content: Quote from: smjcuk on May 15, 2015, 09:01:20 pmThat SEFUSE probably is dead already or the battery pack won't be thrown away in the first place. I will just throw that away.
Ripple on power supply  - Page 1
Forum section: electronics / projects

author: G7PSK
author_rank: Super Contributor
timestamp: April 11, 2014, 08:30:34 pm
content: I have a router that keeps shutting off the internet after about 12 hours. I measured the ripple voltage on the switching power supply at 41.6 milli volts at 10 Mhz could this be the problem. This is of academic interest really as the router has been replaced, but yesterday I tried it out as a wi fi extender and it worked fine as such but this morning when i turned the computer on I could not connect to the internet so on a hunch I unplugged this router and the internet reconnected. Could the 10 Mhz be leaking through the router and onto the phone line jamming the internet.

author: wraper
author_rank: Unknown
timestamp: April 11, 2014, 09:01:06 pm
content: PSU is not a problem. Most likely there are dead electrolytic capacitors in the router itself. It is very common fault.
ripples in output of car alternator regulator - Page 1
Forum section: electronics / projects

author: javadhz2000
author_rank: Newbie
timestamp: April 27, 2023, 10:42:14 pm
content: Hello friends,I simulated a car regulator circuit using samples available on the internet.Instead of using BJT transistors, I used MOSFET in the circuit.Based on the coefficient of the rotor current, I placed a voltage source dependent on the current.The simulation results were not good, and the output ripple was high (which I also observed in the real output).In addition to the transistor base circuit, I also used a Schmitt trigger circuit to generate a PWM wave in the MOSFET gate, but it had no effect on the output.

author: moffy
author_rank: Super Contributor
timestamp: April 27, 2023, 11:21:49 pm
content: To model an alternator, it is basically 3 phase output rectified by a 3 phase bridge (internally) whose amplitude is controlled by the field, it would also have a response time between a field change and the output changing. You might want to start with that.

author: Kim Christensen
author_rank: Super Contributor
timestamp: April 28, 2023, 12:45:40 am
content: Well, one thing that isn't realistic is D4... The car battery acts as a bit of the filter. If you want to simulate a battery, change D4 to a low value resistor to simulate the internal resistance of the battery.
Rise time calculation from Full Width at Half Maximum - Page 1
Forum section: electronics / projects

author: arivalagan13
author_rank: Contributor
timestamp: June 07, 2020, 03:40:53 pm
content: Hi all,I have a question.How do I find the rise time and hence bandwidth required of a signal from the knowledge of Full Width at Half Maximum (FWHM)?FWHM:https://en.wikipedia.org/wiki/Full_width_at_half_maximum#:~:text=Full%20width%20at%20half%20maximum%20(FWHM)%20is%20an%20expression%20of,half%20of%20its%20maximum%20value.I want to find the rise time (bandwidth from that information) of a high gain transimpedance amplifier to amplify a signal from a Faraday cup detector. But, I don't know how to find that information from the minimum or worst case FWHM of 0.7 ms.Can anybody tell me how do I find the rise time from this information?RegardsArM

author: gdewitte
author_rank: Unknown
timestamp: June 07, 2020, 06:27:44 pm
content: If you assume the pulse is Gaussian, it can be shown that the product of the FWHM and the half-power point (f-3dB) of the frequency response =~ 0.31. If the pulse is Gaussian and represents the impulse response of the system, then its integral (a form of the error function, or erf) would approximate the step response of the system and the product of the 10-90% rise time and the half-power point of the frequency response =~ 0.34. For a Gaussian impulse, the FWHM corresponds to the 12-88% points of its integral.

author: arivalagan13
author_rank: Contributor
timestamp: June 08, 2020, 01:26:46 am
content: Thank you gdewitte!!It helped
RJ45 jacks clockwise and anticlockwise - Page 1
Forum section: electronics / projects

author: sw_guy
author_rank: Regular Contributor
timestamp: March 06, 2025, 07:12:17 pm
content: Hello. I have a board that is supposed to use clockwise RJ45 jack (JXD1-0026NL if you take a look at the attached image). I accidentally soldered anticlockwise jack which is naturally not working. I started to think if it works using a cable that reverses pinout. "Electrically" (in terms of the pinout) that is the same, but it is not working. Is this really so? Polarity on magnetics also matters?This is academical question and naturally I have ordered right jacks, but meanwhile waiting for them to arrive I started analyze this a bit further.sw guy

author: ajb
author_rank: Super Contributor
timestamp: March 06, 2025, 07:25:02 pm
content: With these connectors, the contacts at the mating connector side (labeled J1...8 ) is not directly one-to-one with the PCB terminals (labeled P1..10). Standard ethernet cable terminations put the cable pairs on pins 1-2, 3-6, 4-5, and 7-8 for historical reasons. These connectors rearrange the 3-6 and 4-5 pairs at the PCB end to make routing easier. This means you cannot simply reverse the positions of the individual wires in the connector, because they are in a different order than the PCB connections. See the equivalent circuit diagram on page 2 of the datasheet for how J1-8 map to P1-10 -- you will need to refer to that to figure out how to rearrange the wires in the cable connector to make this work.

author: Doctorandus_P
author_rank: Super Contributor
timestamp: March 06, 2025, 08:19:33 pm
content: What does this "(anti) clockwise" mean, for a connector that has it's pins in a single row?There are many different footprints for RJ45 connectors. In general, connectors are one of the most troublesome parts for PCB design because of this reason.On top of that, there are some really weird things, such as the connector below:

author: sw_guy
author_rank: Regular Contributor
timestamp: March 06, 2025, 09:01:04 pm
content: Quote from: ajb on March 06, 2025, 07:25:02 pmThis is what I tried to follow - I mean, reversing pairs according to signal pairs of ethernet cable. Need to try that again - it is easy to make mistake there...