hybridfree/eevblog-posts huggingface dataset:
TDS 500/600/700 Console Port RS232 Interface card - Page 1
Forum section: electronics / testgear

author: maurit
author_rank: Contributor
timestamp: December 27, 2024, 03:41:54 pm
content: Good morning,if you are interested I sell, for TEK TDS 5xx 6xx 7xx Series oscilloscope,interface card for Debugging and add Options.This interface uses Option 013 card for the RS232 output.No need to open the oscilloscope, access from the Opt.013.This interface is homemade and new and professionally built on printed circuit boards.12,00 Euros plus shipping costs.I ship worldwide.Price and conditions are described in the eBay listing.Thanks for watching.maurizio - ItalyEbay Title: "Tektronix CONSOLE PORT TDS 5/6/7xx Oscilloscope Debug Card RS-232 for Opt. 013"

author: maurit
author_rank: Contributor
timestamp: December 27, 2024, 03:47:01 pm
content: I add new photos

author: swanng
author_rank: Newbie
timestamp: February 12, 2025, 03:54:29 am
content: Well, I found your listing on eBay and thought I would give you a try, and purchased your adapter.Now let's see how long it takes to get to California, and if it will work with my TDS 540 and TDS 754D oscilloscopes!I will post results later.Cheers!

author: maurit
author_rank: Contributor
timestamp: February 12, 2025, 11:23:58 am
content: Hi Greg,thanks, it will work with your Tek TDS 5/7xx !It's a long distance between Italy and California but I hope it can arrive soon (may be a week)I would be very pleased to hear your opinion.All the best.Maurizio - Italia
Korad KD3005D power supply fan keeps turning on an off constantly - Page 1
Forum section: electronics / testgear

author: ovis
author_rank: Newbie
timestamp: February 11, 2025, 02:34:17 pm
content: What could be the reason for fan constantly switch on and off every 3 sec? And it's very noisy on stopping.Video (load was 4.2V 0.2A)

author: coromonadalix
author_rank: Super Contributor
timestamp: February 11, 2025, 03:17:54 pm
content: thread w some schematicsthe fan was if i recall pwm ed by the cpuand i think you have a DIY firmware you can try on ithttps://www.eevblog.com/forum/repair/korad-ka3005p-power-supply-calibration/msg1325467/#msg1325467
Fluke DSP-2000 - Page 1
Forum section: electronics / testgear

author: deflorinflims
author_rank: Newbie
timestamp: September 10, 2024, 01:17:11 pm
content: Hellois there anyone that still has the Fluke LinkWare for the DSP-2000 <'We must install an new PC and now i need the Software to install Linkware.The DSP-2000 is not supported by Fluke NetworksMy DSP-2000 ist working fine, so we need it to find errors in our communication Cables.

author: ElectricSlide
author_rank: Newbie
timestamp: February 11, 2025, 02:17:56 am
content: Do you still need Linkware that has the Support for Fluke DSP-2000? I have it available if you need it.
Fluke DSP-4000 Firmware Update - Page 1
Forum section: electronics / testgear

author: D9412G
author_rank: Newbie
timestamp: October 26, 2024, 11:40:51 pm
content: Hello everyone!I recently purchased a DSP-4000 analyzer that had firmware ver 3.901 on it. I download the latest version of Linkware so that I can update the software to version 3.925 which is the last release Fluke had before the unit was discontinued. I followed the instructions that the Fluke website had to update the firmware. However, after doing the update, the main unit no longer appears to be responsive. I just have a blank blue screen. Am I screwed? Or do I need to do something else to get it working again?

author: ElectricSlide
author_rank: Newbie
timestamp: February 11, 2025, 12:41:17 am
content: Did you have any errors during the update within the Linkware software. it would usually appear at the bottom of the screen of the program. Excessive errors at a high transfer speed would result in the memory errors you described. Usually, you have to reflash at a lower speed. Additionally, there is a backdoor method to put your unit into a slave mode to reflash. if you turn on the unit and it chirps when it goes to the blank screen it is in slave mode and is awaiting to be reflashed.
Bside s40 new with problem - Page 1
Forum section: electronics / testgear

author: flr
author_rank: Newbie
timestamp: February 10, 2025, 10:50:15 pm
content: Hello, does anyone have the bside s40? Mine came with a problem measuring AC voltage and temperature, it appears at 09:47 in my reviewhttps://youtu.be/peJsjczGg4g?si=2KPJEe11kOxkYnL1
Bricked firmware on RIGOL DSA875 Spectrum Analyzer - Page 1
Forum section: electronics / testgear

author: chrissaji1234
author_rank: Newbie
timestamp: February 09, 2025, 11:55:05 pm
content: Hello everyone.I have a DSA875 spectrum analyzer that is currently showing a black screen and not responding to any key presses. The TG and Auto button are also lit up (even though I have the version without the TG).This occurred after I accidentally hit the Meas -> DMA key on the spectrum analyzer. I am able to see the boot screen on power up and the device responds to presses of the Preset and Help buttons, so I could theoretically flash the device. But once its booted up the device is locked. What should I do to fix this issue?I saw in the firmware patch notes that this was a known issue in the past and has been since patched. I never updated the firmware on the device and don't know what is currently on it. I was wondering if I anyone had an older version of the firmware for the DSA875 as only the latest version is on the website.Would it be advisable to flash to the newest version? Or does anyone have any other solutions? I would greatly appreciate any guidance on this matter.Thanks,Chris

author: Gerhan
author_rank: Contributor
timestamp: February 10, 2025, 09:31:39 pm
content: I have exactly the similar problem. I have dsa875 with TG and it just goes dark on DMA mode. After restart everything is fine. Somehow you should be able reset it and it should be back to normal. But DMA mode problem screen goes dark and locks the device.What are your firmware versions?

author: chrissaji1234
author_rank: Newbie
timestamp: February 10, 2025, 10:25:04 pm
content: How do you reset the device? Is it a specific key press? Or do you mean power cycle the device? If I try power cycling the device, after boot it still shows a black screen.I don't know the firmware that is currently on the device. I've tried to flash it with the newest version on the website, but it didn't fix anything.
nidaqmx closed source junk? - Page 1
Forum section: electronics / testgear

author: dav888
author_rank: Regular Contributor
timestamp: February 10, 2025, 08:24:35 pm
content: ran across the NI 'USB-6001' and 'USB-6421' which come at a quite nice price....but then really upset to see that their usb driver library is closed source and not available on macOSnot sure why I posted this, but it just so bad to sell equipment that rely on a binary that might not even get support 5 years from now. who knows, we might run OS foo-bar on Risc-V in the future
Miniware MDP-M01 reverse engineering & booting custom firmware - Page 1
Forum section: electronics / testgear

author: Nikolas
author_rank: Newbie
timestamp: February 09, 2025, 11:34:22 pm
content: Hi, so since e-Design have still not open sourced the MDP series power supply modules (and maybe never will, who knows), I've done a bit of reverse engineering on the MDP-M01 control module.I made aGitHub repowith all my findings including the full schematic, STM32 CubeMX project file and an example project on how to make custom firmware boot (while leaving the factory bootloader in place).I was hoping to get a custom firmware project started but I won't have the time for that any time soon so I thought I'd put this out here so it's easier to find in case anyone else wants to give it a go.There are already some efforts to reverse engineer the protocol that the modules use to communicate, likeMDP-P906-Controllerbased onmdp_commander.If anyone has any questions, let me know.Cheers
TestController and Brymen BM869s  - Page 1
Forum section: electronics / testgear

author: a_uli
author_rank: Newbie
timestamp: February 09, 2025, 11:33:40 pm
content: Hi!I try to connect a BM869s to HKJ's TestController (thank you for this very promising logging systrem!) on a Linux system. The Brymen BM869s socket doesn't work under Linux, as I was told by HKJ. So I try to use the alternative BM869s (serial) socket. Currently I test on a Win10-64 computer.As serial interface I copied the device presented by jesuscf - also thanks for sharing this design. I use his ino-file on an old MEGA 2560. Connection is via a virual com port. The baud rate is 115200.The serial interface works fine with hterm. The commands "*IDN?", "MEAS?", MEAS1?", "MEAS2" yield the expected results.In TestController (in debug mode) I selected the BM869s (serial) socket. I enter commands in the "BM869"-line of TestController's Commands tab. The protocol appears in the cmd window opened by testControllerDebug.bat:Starting;; jSerialComm version: 2.10.3;; Start thread for: COM13 - Brymen BM869s (Serial);; COM13: Set params: 115200;; Found Brymen BM869s (Serial) on Arduino Mega 2560 (COM13) (COM13)*IDN?;; BM869: Tx <*IDN?>;; BM869: Rx <Brymen,Brymen BM869s,>;; Brymen,Brymen BM869s,MEAS1?;; BM869: Tx <MEAS1?>;; BM869: Rx TimeoutI assume nothing is sent via USB, although "*IDN?" seems to give a result. But this is fake, because I changed the return string in the Arduino firmware to some absurd value. This value is not returned - or it is replaced by TestController with " Brymen,Brymen BM869s" ()And the "MEAS?" commands do not trigger a read on the IR interface. With hterm they do (observed with a scope).What is wrong with my setup? Any hint is welcome.Uli
DER EE DE5000 - Hantek 1832C - EastTester ET432  LCR Meter review - Page 1
Forum section: electronics / testgear

author: Martin72
author_rank: Super Contributor
timestamp: February 09, 2025, 10:51:51 pm
content: Hi,A nice video, thanks for that.I'm not surprised that the DE5000 still performs well; it's simply well designed and is one of the favorites in the field of portable LCR meters.A few notes:- The 100kHz measuring frequency should be taken with a grain of salt in all low-priced meters that offer it.Especially when it comes to displaying the second parameter, it can hardly be trusted with increasing frequency.- You used the DMM+ reference as a reference, the new version of it.I have the predecessor of it, where the L/C unit was still optional.However, it is identical to the L and C of your new version, so I can still say something about it:When I received my DMM+ with the L/C board, I was initially disappointed.Neither the capacitors nor the inductors were precision types, but simply standard products that had been measured.And then with a rather normal LCR meter from BK.We can only hope that their BK891 was at least calibrated using reference capacitors and inductors.However, a comparison is only a comparison if all test candidates have the same basis.In other words, there is only one measurement frequency that is comparable to the “reference”, namely the one used to measure the DMM'+ reference.According to the calibration certificate of my DMM+ reference, this was10kHzwhen the measurements were performed on the L/C part.In other words, only the 10kHz measurements are directly comparable to the reference.And then it would also have to happen at the same measuring voltage, but this is not mentioned in the certificate.This is just cherry picking, but it should be mentioned so that it can be categorized.Martin
Hioki CT Current Probes used? (Also oscilloscope question) - Page 1
Forum section: electronics / testgear

author: TSOL
author_rank: Contributor
timestamp: February 08, 2025, 06:51:48 pm
content: Hello, I am new here and have been browsing to see what the general consensus is on current clamps. A lot of people like the cheaper Uni-T stuff, but I am a fan of buying equipment once and have heard varying opinions on them. I am looking to get a meter that will be able to pretty reliably gauge starter current and EV motor phase current (200-500A), so it does need to be in the higher current range. I don't need crazy accuracy, but I like looking at the high accuracy stuff and this is for personal projects, so if its within the budget of about 800 for a probe, I don't mind.I was very close to purchasing a Hioki current clamp (CM4373-50), but I noticed it had practically nonexistant accuracy at lower currents (1A<x<60A). Other models seem to have better accuracy at lower current but less high peak current, but overall it appears that the Agilent Keysight U1213A clamp meter has overall better accuracy. But then, it seems people here complain about how slow it acquires measurements, however? I haven't seen too many reviews of these pieces of equipment as they're not as popular due to their price tag.Anyways, a third option is to use Hioki Current clamps that are meant for power analyzers (CT6841A-CT6846A for example). Their listings on TEquipment and on Hioki's website claim they are usable with an oscilloscope. When New, these probes are multiple thousands of dollars, but there appears to be a used market for the old stuff. I found a listing for a CT6846-05 (the old version, non "A") for 800$. It appears to be "excess aerospace surplus" according to the Ebay listing.Ebay Listing in question:My question after all that rambling is: Has anyone heard of fake Hioki current clamp probes on ebay? Or do you guys think this is legit? If legit, what kind of oscilloscope would be required to "run" this thing? I know it needs its own power supply, I am accounting for that. It seems that it just outputs a specific amount of mV/Amp, so I would think a standard ~$600 range scope would suffice, but I figure I'd ask first. Also if other companies have new/used probes in my price range that are better value, please let me know, as its very hard to cover all my bases before making this post.

author: Kean
author_rank: Unknown
timestamp: February 09, 2025, 11:26:59 am
content: I don't have any experience with those, but I note that they come with a 12 pin connector.You would need something like a Hioki CT9555 to power the sensor and provide an BNC output for the waveform.
SMB connectors, cable and crimping tool suitable for HP863E cable repair. - Page 1
Forum section: electronics / testgear

author: djsb
author_rank: Super Contributor
timestamp: February 08, 2025, 07:35:19 pm
content: Can anyone recommend any SMB connectors, matching cable and a suitable crimping tool that can be used to repair a few internal cables on an HP/Agilent HP8563E spectrum analyser? I do not have any experience working with these cables, and I will only need to repair maybe one or two at the most. I may get the cables made up by a specialist if this makes more sense. Is it also a good idea to change the matching PCB mounted connector at the same time? Any suggestions? Thanks.PS These are definitely right angle SMB connectors but not sure if male or female are needed. The cables (RG174? Not sure) are also in different colours. The instrument is in storage nearby, so I can check tomorrow.

author: Harry_22
author_rank: Frequent Contributor
timestamp: February 08, 2025, 08:20:57 pm
content: Hi David!It is not a problem for the specialist to repair any internal cable with crimped connectors.Would you attach the photos to do the diagnosis.

author: djsb
author_rank: Super Contributor
timestamp: February 08, 2025, 08:54:31 pm
content: Thanks for your reply.I've not actually identified a faulty cable yet. I'm making initial enquiries based upon a suggestion made to me by Keysight UK.Once I've found the culprit (if indeed that IS the problem) I'll post the gory details. Please bear with me. Thanks.

author: Kean
author_rank: Unknown
timestamp: February 09, 2025, 04:18:50 pm
content: Instead of making them yourself, maybe get some premade ones from Superbat RF.https://www.rfsupplier.com/c/smb-cable_0303e.g. straighthttps://www.rfsupplier.com/smb-plug-to-smb-plug-cable-using-rg174-coax_p6458.htmlor right anglehttps://www.rfsupplier.com/smb-plug-right-angle-to-smb-plug-right-angle-cable-using-rg174-coax_p6490.htmlThey may not be up to the same original quality/frequency/loss specs, but depending on the problem you are trying to solve they may help prove or disprove a theory reasonably cheaply.

author: xrunner
author_rank: Super Contributor
timestamp: February 09, 2025, 05:02:53 pm
content: Quote from: djsb on February 08, 2025, 07:35:19 pmIt's not too difficult. I made a pair for an hp 54501A scope. See the pics. Yea I used RG174 and a crimping tool that you can get various dies for you just get the die size and put it in the general purpose crimper. FYI the damaged BNC was a before pic.
Fluke 867B - doesn't enter set-up mode - Page 1
Forum section: electronics / testgear

author: asava
author_rank: Newbie
timestamp: August 08, 2017, 09:07:38 pm
content: Hello,I picked up a Fluke 867B, and it fails to enter set-up mode. In rest, it seems functional.Does anyone have an idea what it could be?I tried cleaning the contacts on both sides of the rotary switch, but the problem persists.I attach a photo with how it looks in set-up mode.Any ideas are welcome!Thanks!

author: Wytnucls
author_rank: Super Contributor
timestamp: August 10, 2017, 07:25:42 pm
content: Mine has developed the same fault now. I haven't had time to troubleshoot the problem yet.The maintenance manual is available online, if that's any help.

author: mzacharias
author_rank: Frequent Contributor
timestamp: August 10, 2017, 07:35:52 pm
content: Mine did that and I wasn't able to fix. I replaced a cap or two inside - no go. Sold "as-is" on eBay. Other than not entering setup, it worked fine; just could not change any default settings.

author: mahi
author_rank: Regular Contributor
timestamp: August 10, 2017, 07:45:43 pm
content: Exactly the same screen is shown if you hold the dial between any two positions. So at first glance it looks like the multimeter does not detect the rotary switch is in SETUP position.The circuit to read the dial position is quite simple so it should be easy to confirm whether the switch works okay.

author: Wytnucls
author_rank: Super Contributor
timestamp: August 10, 2017, 09:13:34 pm
content: Yes. The switch is a voltage divider, presenting a varying voltage on pin 83 of U25.Hope U25 is not the culprit.

author: Wytnucls
author_rank: Super Contributor
timestamp: August 11, 2017, 09:05:39 am
content: Fixed!Tested all the values of the resistors around the selector switch.Found R166 (component test) reading a bit low, at 4.5K ohm, instead of 4.99K ohm.Cleaned the resistor with electronic cleaner. The resistance only went up a little bit (4.6K ohm), but that was enough to activate the right sequence in U25.

author: Wytnucls
author_rank: Super Contributor
timestamp: August 11, 2017, 09:19:17 am
content: Vdd is 5.2VR170 (Logic) 49K9 reads 12K0 on mine.R168 (Setup) 6K0 reads 5K2.All the other resistors have the correct values.Smoothing cap C64 (Ceramic 10% 25V X7R 0805) should measure 0.1 uF.I couldn't find TP22 (40 MIL test pad) to check the voltage to pin 83 (U25).(Update:Test pad 22 is on the reverse side of the PCB close to the selector switch)I would recommend cleaning all resistors and PCB around the selector switch before replacing anything.

author: eduaqa
author_rank: Contributor
timestamp: February 08, 2025, 11:11:19 am
content: I know is a old thread, but what I have seen is that sometimes the copper track between the resistor and the rotary "island" don't contact well,too measure the real resistance of the rotary position, put the rotary on the position you want to measure and measure between the "ground" on the rotary connected point and on the point where the track goes to the u25. Measuring the resistor directly on their soldering point does not measure the real resistance of the voltage divider
Is there an replacement for Riden modules, with better UI? - Page 1
Forum section: electronics / testgear

author: LinuxHata
author_rank: Frequent Contributor
timestamp: March 02, 2024, 02:28:31 pm
content: Hello.I'm looking for something with same functionality as RD6012P, 6018, etc. (60V 12-20-30A output)Riden's have two issue:1. They do not remember last voltage/current settings on power off.2. Adjustment of output voltage/current (adjusted values, not actual values) are displayed separately and with small letters. I want the main A/V indicators to change when I adjust voltage or current.So I need something that will be free from these issues.Thanks!

author: unicornio
author_rank: Contributor
timestamp: January 22, 2025, 11:18:01 pm
content: i have the riden rd6024 and it remember all last configuration after a power off, even without use the internal battery...

author: thm_w
author_rank: Super Contributor
timestamp: January 23, 2025, 12:53:17 am
content: Yeah they definitely remember the last setting, maybe its the option: Boot MemCell = M0.Are you running unisoft firmware?https://github.com/wildekek/rdtech-firmware-unisoft

author: unicornio
author_rank: Contributor
timestamp: January 24, 2025, 02:04:27 pm
content: No, I'm looking forward to getting into it, but I haven't spent time on it yet...I can't find the 1220 battery, and since it memorizes the most important things, I'm no longer worried about it...;-)

author: LinuxHata
author_rank: Frequent Contributor
timestamp: February 08, 2025, 06:20:07 am
content: I have RD6012P and RK6006, and alternative firmware is not available for these models.
Tektronix TM502A Transformer noise problem - Page 1
Forum section: electronics / testgear

author: Gulftown
author_rank: Regular Contributor
timestamp: January 17, 2025, 10:15:26 am
content: Hello,i have a problem with my Tektronix TM502A with an AM503 plugin.I get a weired noise signal on the output of the amp as well as when i touch the case with a probe.It somehow seems like bad grounding, but i measured the gound and it is connected and has low resistance.The signal seems like a 3rd harmonic of the transformer mains.I unplugged everything from the transformer except the primary side and still get that signal on the case and outputs.Funny is that i see the signal even if i clip the gound clip of the probe to the probe it self and touch the case, indicating there is some current flow into the gound of the oscilloscope.Anyone ever had a similar problem?Help would be very appeciated.

author: David Hess
author_rank: Super Contributor
timestamp: January 17, 2025, 01:41:28 pm
content: Is the transformer running hot? What happens if you disconnect the earth ground?I would suspect an insulation failure in the transformer.

author: Gulftown
author_rank: Regular Contributor
timestamp: January 27, 2025, 08:31:01 pm
content: Quote from: David Hess on January 17, 2025, 01:41:28 pmThanks for the Tipps.I disconnected earth ground from the grid input and the noise went away.I instantly suspected a ground loop problem, but in a instrument like that, this should not happen in my opinion.I used a 12V TVS diode between the chassis and the grid earth, so in case of a fault the GFCI will pop.This solves the problem for me.

author: David Hess
author_rank: Super Contributor
timestamp: January 27, 2025, 09:45:24 pm
content: Quote from: Gulftown on January 27, 2025, 08:31:01 pmThe transformer has an electrostatic shield which is brought out on connector pin B10, and also connected to ground through a low value resistor. Disconnecting it will allow more coupling to the outputs, but maybe it will matter for your application.

author: Gulftown
author_rank: Regular Contributor
timestamp: January 28, 2025, 09:07:43 am
content: I tried to disconnect the shield from ground, but that did not change the waveform present on the scope.We have the same Amp with a serial number close to mine in my workplace and, as far as i know, it does not have the problem, thats why i suspected a fault in my caseI wonder if someone had modified it in the past and just disconnected the gound wire (i will check tomorrow).I would assume, that any of those TM502A will suffer from a ground loop problem if both the scope and the amplifier are connected to ground.

author: Gulftown
author_rank: Regular Contributor
timestamp: February 06, 2025, 08:09:03 am
content: I measured the amp in my workplace yesterday and it does not seem to have the problem.And no diode between line ground and chassis. There might be something wrong with my transformer, but the voltages are fine and it does not get too hot,I used a variac to reduce the voltage to test if its a saturation problem, but i needed to go down to 170V to completely get rid of the noise.The Supply is set to 240V so that should not be saturation.
XGecu TL866II Plus programmer TSOP-40A 8-bit adapter pin mapping - Page 1
Forum section: electronics / testgear

author: Edin
author_rank: Newbie
timestamp: February 07, 2025, 12:09:57 am
content: After MUCH research and frustration in looking for the exact pin-mapping between TSOP40 and DIP40 on the adapter for TL866II Plus, I was finally able to do it.Even though the manufacturer of this programmer and its adapters states on its website that its adapters are "open source" and that its customers can make their own adapters, there was no information on the Internet that I could find regarding this specific adapter design.After many hours of search, I got two semi-decent images (top and bottom) of the mentioned adapter, placed them in GIMP, did some stretching/resizing and rotating to match them (I spent many hours there as well, being a beginner with GIMP).Finally, after spending some hours tracing each line multiple times and correcting my previous errors in tracing, I had a text file correctly matching the pins between the two different "sockets", which was late for my homemade adapter which I had wired directly (pin 1 to 1, 2 to 2, 3 to 3, etc.).A few days ago I got the adapter boards from AliExpress, and I have scanned them (at 300dpi which should be good enough) to share the detailed images with the world because of my own frustration of not finding them when it was urgent for me to have these adapters.I am also including the mapping between TSOP40 and DIP40.I plan to include PCB design files eventually, but as a beginner in KiCAD and EDA, I will need more time, though the 1:1 scans should make it easier now.The images are attached below in 256-color PNG format, below 300kB each.The first two are the top and bottom sides separately, and the third image is the two of them superimposed on top of each other so that the holes are matched and traces can be relatively easily followed.Hopefully many other people find this useful and not waste many frustrating hours or even days looking for this information like I did.Here is the pin mapping in a plain text format, grouped for easier following (also attached below as a txt file):TSOP - DIP1 252 153 144 135 116 127 308 169 110 211 312 413 514 615 1016 917 2918 2819 2720 2621 3422 3323 3224 3125 1726 2427 1928 2029 3530 3631 3732 2133 2234 2335 1836 3837 3938 4039 740 8
picture of main logic board - Page 1
Forum section: electronics / repair

author: sdev2004
author_rank: Contributor
timestamp: March 28, 2015, 01:18:50 pm
content: this is the picturehttp://imagizer.imageshack.us/a/img674/779/1B0C33.jpg

author: dr.diesel
author_rank: Super Contributor
timestamp: March 28, 2015, 02:11:02 pm
content: Ok, but do you have a question about it or?

author: xrunner
author_rank: Super Contributor
timestamp: March 28, 2015, 02:16:16 pm
content: Quote from: sdev2004 on March 28, 2015, 01:18:50 pm

author: nitro2k01
author_rank: Frequent Contributor
timestamp: March 28, 2015, 02:22:22 pm
content: Seems he accidentally created a new topic instead of replying in his existing one.https://www.eevblog.com/forum/repair/23'-apple-cinema-display-(a1081)-no-power/msg639087/#msg639087

author: sdev2004
author_rank: Contributor
timestamp: March 28, 2015, 02:53:18 pm
content: Sorry guys! i was suppse to upload the pic on my previous thread and i am unsure how to remove this thread. Nitro2k01 thanks for clarifying this

author: sdev2004
author_rank: Contributor
timestamp: March 28, 2015, 03:15:40 pm
content: The problem with the Display is there is no power, no lights, not screen, nada! I got it from a tip and trying to bring it back to lifeits a apple A1081 display. Any help is greatly appriciated

author: nitro2k01
author_rank: Frequent Contributor
timestamp: March 28, 2015, 08:09:35 pm
content: You should be able to remove this topic using the button in the top right of the first post.
S08FL bus clock speed selection - Page 1
Forum section: electronics / general

author: Circlotron
author_rank: Super Contributor
timestamp: May 28, 2022, 05:11:02 am
content: MCU has external 10MHz oscillator module.ICSC1 is #%10000000 external reference clock selected.ICSC2 is #%00110000 clock source divided by 1.If I BSET then BCLR the port pin goes high for 1uS. I was expecting 0.5uS seeing it takes 5 cycles.What have I done wrong?Chapter 8.3 of attached databook.Edit - corrected pulse duration figures.

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 28, 2022, 01:41:31 pm
content: It seems a single CPU cycle takes 2 clocks? (T1,T2,T3,T4)

author: Circlotron
author_rank: Super Contributor
timestamp: May 28, 2022, 02:56:23 pm
content: 2 clocks? On the PA version of that family of micros a cpu cycle takes 1 clock cycle. With a 4 meg external oscillator BSET then BCLR takes 1.25uS. Seen it with my own eyes. I would have thought there would have been some sort of consistency across the family. One thing is for sure, the naming consistency of the registers is an absolute train wreck. What page of the manual is that you posted?

author: DavidAlfa
author_rank: Super Contributor
timestamp: May 28, 2022, 04:57:51 pm
content: Oops my bad, I searched HC08 instead HCS08 core!No idea then...

author: Circlotron
author_rank: Super Contributor
timestamp: June 01, 2022, 02:51:40 am
content: Okay, problem solved. Use the codeCode:LDA #%00011000STA ICS_C1LDA #%00110110STA ICS_C2Thanks to vincentegomez at the NXP forum.Among other things, the external clock has to be divided down so the resulting frequency is in the range 31.25 kHz to 39.0625 kHz. Bit 5 of ICS_C2 and bits 5,4,3 of ICS_C1 select a divide ratio.
GTKWave, do you know a way to create a VCD file? - Page 1
Forum section: electronics / general

author: legacy
author_rank: Super Contributor
timestamp: August 17, 2017, 02:32:08 pm
content: I am going to create a mini-project which aims to use GTKWave as VCD visualizer.But I can't find an example on how to create (from a C piece of code) a VCD file.Anyone?

author: Kalvin
author_rank: Super Contributor
timestamp: August 17, 2017, 02:53:16 pm
content: There is a Python package available:http://pyvcd.readthedocs.io/en/latest/Maybe you ca use that as a converter, or just as a starting point for a C implementation.

author: legacy
author_rank: Super Contributor
timestamp: August 17, 2017, 03:11:20 pm
content: Quote from: Kalvin on August 17, 2017, 02:53:16 pmthanks

author: legacy
author_rank: Super Contributor
timestamp: August 17, 2017, 07:49:54 pm
content: With Xilinx ISim,thisis useful as well.
I/O Standards on an FPGA - Page 1
Forum section: electronics / general

author: steamedhams
author_rank: Regular Contributor
timestamp: April 29, 2021, 11:17:37 am
content: I am currently looking at the dynamic power usage of an FPGA and I have started to look into the different I/Os offered.I have read the datasheets and white papers supplied by the major vendors.When I change an I/O to a different standard, for instance, LVCMOS 1.8V to 2.5V, what is changing internally?The impedance is controllable? The reference changes??

author: radiolistener
author_rank: Super Contributor
timestamp: April 30, 2021, 03:17:43 am
content: Quote from: steamedhams on April 29, 2021, 11:17:37 amAs I know, there is no change in hardware. These settings just affects synthesis, fitting and routing during compilation. Such setting will be taken into account for delay and timing optimizations. Because different I/O standard means different load and different source current and result it affect transition timings.Such setting doesn't affect reference voltage, doesn't affect impedance or some other hardware change. It just affect timing optimization for a compilation/synthesis process.But this is just my findings, I'm not sure if that is 100% correct.

author: langwadt
author_rank: Super Contributor
timestamp: April 30, 2021, 03:49:39 am
content: Quote from: steamedhams on April 29, 2021, 11:17:37 amthe voltage doesn't change, you do that by connecting a different supply. But the tools configure the output and report timing assuming you connect what you said you did. an IO configured as 1.8V LVCMOS will work just the same with a 2.5V supply. it just might not be exactly to specin the case of internal termination resistors they might not have the correct values if you connect a different voltage, and with some IO standards the output might turn of to protect the transistors if you connect a higher than supported voltage

author: NorthGuy
author_rank: Super Contributor
timestamp: May 03, 2021, 01:40:08 pm
content: I think Xilinx uses different LVCMOS buffers for low (1.8 or less) and high voltages. At least there are bits in the bitstream which change with voltage and there's a configuration pin which sets the voltage for other configuration pins.
Struggling to get LatticeMico 8 soft processor to do what I want - Page 1
Forum section: electronics / general

author: slburris
author_rank: Frequent Contributor
timestamp: March 10, 2015, 04:29:10 am
content: Here's what I'm trying to do. Taking a machx02 fpga, drive a 32x64 bit RGB led panel using embedded block RAM as the buffer memory. Use an embedded Lattice Mico 8 processor to read time info from a GPS module, and write the time/date into the EBR to display.Generating the LED panel timing is relatively simple. And I've gotten an LM8 talking through a UART doing "hello world".Where I'm falling down is understanding how to marry the two. What I want is to take dual port EBR, connect one port to the LM8 memory address space, and have the other port drive the LED panel timing. I can see how you can throw more memory into the processor from system builder but how do you refer to that? Does the CPU instantiation somehow get modified to "pass out" that EBR so that you can connect it to your verilog?Basically how exactly do you extend the processor with custom peripherals and get them visible outside the processor? Either I'm not understandings how this all is supposed to work, or I haven't read the right documentation, or something. Googling for LM8 examples doesn't seem to turn up much beyond Latticce docs. Is no one else playing with stuff like this?Scott
Poor Man's LTFLU-1CH - Page 1
Forum section: electronics / general

author: zhtoor
author_rank: Frequent Contributor
timestamp: June 06, 2017, 08:55:40 pm
content: D1 is emitter-collector junction of one of the transistors on a THAT300 (reverse breakdown = 5.4V)Q2 is another one on the chip.the remaining two can be used to implement die temperature sensor and a heater.i have measured the reverse break-down on THAT300 npn transistors ca. 5.4V (+.65 = 5.95V) and pnp transistors ca. 8.1V (+.65 = 8.75V)comments required from the learned members of the forum.regards.
Yaesu FT8800 Squelch fault. - Page 1
Forum section: electronics / rf-microwave

author: DaveMX5mk1
author_rank: Contributor
timestamp: April 17, 2021, 09:03:39 am
content: Hi, I know it's a long shot but as my Dad used to say " If you don't ask you don't get. "I have a Yeasu FT-8800E, it's about 10 years old but hasn't been used very much.I've not used it for about 4 months and when I now turn it on the the SUB band receiver squelch control has no effect. " BUSY " flashes on the disply at about 4 htz, at first I thought it was flashing a fault code as the number of flashes varied, sometimes 4 then a longer gap sometimes up to 20 then a gap but this turns out to be random.If I set the SUB band to S20 and transmit on my portable rig no signal is received. The main channel works perfectly. If I swap the MAIN and SUB channels over from left to right or visa versa then the fault moves too and remains on whichever side has the SUB channel selected.After an amout of time between about 5 minutes to 15 minutes the radio starts to work perfectly on both channels. If I turn it off while it is working and leave it for about 5 minutes and turn it on it still works normaly.The supply voltage is a steady 13.8 volts.Has anyone heard of this or can offer any advice I would be very greatful.Thanks in advance.Dave
Video: A bender. UB-100 (This Old Tony) - Page 1
Forum section: electronics / general

author: Ed.Kloonk
author_rank: Super Contributor
timestamp: March 14, 2022, 01:33:42 pm
content: Wotcha reckon?

author: totalnoob
author_rank: Regular Contributor
timestamp: March 14, 2022, 04:34:47 pm
content: Can't say much on the bender itself, but I love his channel and watched this last night. I don't think I have ever seen one of his videos that I was not thoroughly entertained by (as well as educated). I enjoyed watching his repair of the old bender, too, since I have a machinist vise that I would like to restore that looks like my dad got it from the trashcan of a HS shop class.I was not sure if it was cast iron or ductile iron but have since found out it is ductile iron, so it should be OK to fill in the divots with weld filler material.

author: SmallCog
author_rank: Frequent Contributor
timestamp: April 04, 2022, 09:34:50 am
content: I’m not sure which model but one of my colleagues has one of these from here and is impressed by ithttps://www.machineryhouse.com.au/bar-bendersPretty sure he got it for a fair bit less on saleFor what I do I’m happy with my vice bender (snaffled on a 30% off day)https://www.supercheapauto.com.au/p/kincrome-kincrome-vice-metal-bending-brake/593989.html?gclid=CjwKCAjwrqqSBhBbEiwAlQeqGv7flZGU37L4igb3xaC-ECKhY3cwOCEmM5RP98hWjGPDCw1nKEpqnhoC7A4QAvD_BwE&gclsrc=aw.ds
KiCAD 7 Rotate Pin Numbers and Names - Page 1
Forum section: electronics / general

author: jaybp
author_rank: Newbie
timestamp: March 17, 2023, 09:57:19 pm
content: I just started using KiCAD 7. Is there any way to rotate pin numbers and/or names on the schematic symbol? I don't see it under Pin Properties in the Symbol Editor. I'm guessing this request never made it into V7? I come from the Orcad Capture world where I would often rotate names and pin numbers on vertically place pins.

author: SiliconWizard
author_rank: Super Contributor
timestamp: March 17, 2023, 10:02:33 pm
content: I don't think there is and while a minor thing, I also think it's unfortunate not to be able to select pin num and pin name orientation.

author: Benta
author_rank: Super Contributor
timestamp: March 17, 2023, 10:52:30 pm
content: Just unselect the show pin names and numbers and add your own. Have fun. Tilting my head takes less effort...
New chip lets robots imagine their actions before they make a move - Page 1
Forum section: electronics / general

author: windsmurf
author_rank: Frequent Contributor
timestamp: July 02, 2019, 11:02:44 pm
content: New chip lets robots imagine their actions before they make a move, making them adaptable to a changing environment.https://www.technologyreview.com/s/613631/a-new-chip-lets-robots-imagine-their-actions-before-they-make-a-move/

author: NiHaoMike
author_rank: Super Contributor
timestamp: July 03, 2019, 04:28:03 am
content: Reminds me of how Markus and Connor in Detroit: Become Human have the ability to plan acrobatic moves before actually doing them.
Via in Pad Callout, VIPPO - Page 1
Forum section: electronics / general

author: cjurczak
author_rank: Contributor
timestamp: March 05, 2019, 03:12:10 pm
content: I'm looking to utilize via in pad (VIPPO) for the first time. I have some questions for those of you who have done this before. I've got a 0.5mm pitch BGA, with a 0.3mm ball, so I'm targeting a 0.25mm pad. Now for a couple of questions.1. Is there are common way to call out VIPPO on your fab drawing for the board supplier?2. Traditionally my suppliers wanted a minimum 3mil annual ring, on a 0.25mm (9.85mil) pad that would mean a <4mil drill, am I missing something. I thought VIPPO was suited for fine pitch BGAs such as this.3. When I specify VIPPO the via is filled, and plated over, is this done on one side or both sides?4. How do I identify which vias should be filled and plated to the board supplier? (I'm using Altium if that matters)I'm sure to some of you this is old hat, but after all my experience in PCB design I've never had a need for VIPPO until now.

author: free_electron
author_rank: Super Contributor
timestamp: March 05, 2019, 09:06:59 pm
content: VIPPO is Via In Pad Plated Over. The hole is filled with an epoxy compound and then plated shut. You will see no hole. VIPPO is typically still mechanically drilled all the way through. once you drop to BGA with a pitch smaller than 0.6mm you need stacked vias. For a 0.5mm pitch BGA you need stacked and blind vias. You can not go all the way through the board ( you won't be able to do the fan out anyway.)Without knowing more i can not really give any good advice.what does the BGA grid look like. is this a 3x3 bga or a 15x15 bga ? how many active rings ? power / ground web ? how many layer board ? board thickness ? copper thickness ? are you using controlled impedance ?If this bag has more than 4 rings you will need a 6 layer board with laser vias and dog-bone the breakout. you can use mechanical drill on the inner layers to save cost, but your outer layer will become laser.you can PM me if you want. i have plenty of experience doing such boards.
DesignSpark PCB 8.0 BETA - Page 1
Forum section: electronics / general

author: Bloch
author_rank: Unknown
timestamp: November 06, 2016, 04:54:27 pm
content: I did just seeDesignSpark PCB 8.0 BETAAny news on that new ?

author: hagster
author_rank: Frequent Contributor
timestamp: November 06, 2016, 09:14:13 pm
content: Nice find. Is there a changelog somewhere?.

author: hagster
author_rank: Frequent Contributor
timestamp: November 07, 2016, 10:49:08 am
content: Other than a useless 'sketch track' tool I can't see any difference.

author: tggzzz
author_rank: Super Contributor
timestamp: November 07, 2016, 07:46:21 pm
content: Does it run under Wine or in WinXP? If not, I'm not interested.DesignSpark6doesrun in WinXP and under Wine.

author: Bloch
author_rank: Unknown
timestamp: November 07, 2016, 07:47:48 pm
content: Well it free so you can try it out for free

author: tggzzz
author_rank: Super Contributor
timestamp: November 07, 2016, 07:52:34 pm
content: Quote from: Bloch on November 07, 2016, 07:47:48 pmNot completely free: it would soak up some of my remaining life.The worst case is that it appears to work for a little while, and then unacceptable problems appear. If someone has already been down that path, they could either save many people some time or could provide encouragement that it would be time well spent.

author: technotronix
author_rank: Regular Contributor
timestamp: December 31, 2016, 10:48:30 am
content: I would love to try as is it free.

author: Inflex
author_rank: Regular Contributor
timestamp: December 31, 2016, 10:57:48 am
content: Quote from: hagster on November 06, 2016, 09:14:13 pmhttps://www.rs-online.com/designspark/pcb-technical-specificationsI see it only is on Windows :\

author: richardlawson1489
author_rank: Regular Contributor
timestamp: January 11, 2017, 06:43:17 am
content: What is the exact difference in 8.0 other than 'sketch track' tool?

author: ebclr
author_rank: Super Contributor
timestamp: January 11, 2017, 07:18:22 am
content: XP and Wine ?
Copper distribution calculation - Page 1
Forum section: electronics / general

author: Blackgar
author_rank: Contributor
timestamp: July 05, 2023, 06:37:33 am
content: Recently I had some issues with the plating index (that's how Eurocircuits is measuring the copper distribution -https://www.eurocircuits.com/platingindex-_solutions/).I had to re-upload many times the gerber files to see how the index is affected after changes.Is there any way to calculate this index on Altium;

author: free_electron
author_rank: Super Contributor
timestamp: July 05, 2023, 06:04:48 pm
content: There is special software to do that.https://www.elsyca.com/plate/pcb-platingAt panel level this is handled by the board manufacturer.

author: Pseudobyte
author_rank: Frequent Contributor
timestamp: July 06, 2023, 12:37:27 pm
content: If my boards are really uneven I will do something like this, but I usually just eyeball the size of the thieving features.
Renumber hole schematic sheets without losing component links - Page 1
Forum section: electronics / general

author: electricar
author_rank: Regular Contributor
timestamp: May 15, 2017, 09:38:07 am
content: Hello folkswhat is the easiest way to renumber the designators in hole schematic sheets in Altium without losing the component links?My layout is finished and I want to reduce the sheets and renumber the designators as mine are numbered like this:Sheet 1: R100, R101…Sheet 2: R200, R201……Now some parts from sheet 2 were moved to sheet 1 and have to be renumbered to R1xx and so on...I did the reset and re-annotation in Altium but I loose the component links.Thank you very much in advance!Kind regards

author: ajb
author_rank: Super Contributor
timestamp: May 15, 2017, 02:02:33 pm
content: Did you restore component links after moving the parts but before reannotating? Moving the parts from one sheet to another is likely what's breaking the links, so if you restore the links immediately after, before you change the designators, you should then be able to reannotate without issue.There may be additional complications if you have repeated sheets or something depending on annotation settings, but then you probably wouldn't be moving parts into those sheets.

author: electricar
author_rank: Regular Contributor
timestamp: May 15, 2017, 03:05:54 pm
content: Quote from: ajb on May 15, 2017, 02:02:33 pmHi ajb,I found the solution in the official Altium forum:https://forum.live.altium.com/posts/198084It has to do with the cut and paste of the parts to the new sheet, what resets the unique IDs, which make the link between the schematic and the PCB. Selelcting the components, right click and "Refactor > Move Selected Subcircuit to Different Sheet" keeps the unique IDs.If you move the components like that, you can renumber them to your wishes without having to make the links again.I'll just paste the post here, as it is quicker than to login into the Altium forum to view the post:Quote
I want to export positive power planes - Page 1
Forum section: electronics / general

author: taquionbcn
author_rank: Newbie
timestamp: September 27, 2011, 08:48:11 am
content: Hi there,I would like to export some Gerber files from my altium project, the problem is that I can only export the power planes in the negative way. I know Power planes are used in the negative way in Gerber files. But I want to make EM simulation with ADS and ADS doesn't support negative Gerber, it don't know how to work with them.So, If somebody knows how to export to positive or edit the power plane Gerber file I will be very thankfully.Best regards,Taquionbcn
Tektronix   2755P   Analyzer - Page 1
Forum section: electronics / testgear

author: oe7dbhnew
author_rank: Contributor
timestamp: December 26, 2024, 01:20:35 pm
content: Hi GuysI have athermal problemwith my Tek2755P.At some temperatures it works ok without any errors, and at other temperatures it gives the message:Frequency control Failure Tuning failure - 1ST LO ( for span below 10MHz )Error 7 Oscillator corrections are disabledHas anyone had a similar problem and successfully solved it ?Which plug-in card or component caused the error ? .....Can anyone help ?It's annoying when something fails during the measuring process (usually at around 20°C ambient temperature),then I have to either cool it down or heat it up to make it work again.Vy 73 de OE7DBHDarko

author: oe7dbhnew
author_rank: Contributor
timestamp: February 03, 2025, 03:00:03 pm
content: No reply ! , it can't be true that I'm the only one having this problem with TEK2755P,can it ?

author: squadchannel
author_rank: Frequent Contributor
timestamp: February 03, 2025, 03:15:51 pm
content: Ask at tekscopes groups.io.https://groups.io/g/TekScopes/topics

author: jonpaul
author_rank: Super Contributor
timestamp: February 03, 2025, 03:20:40 pm
content: May be VCO/YIG/xtal oven fail.see also Tekscopes2 at groups .io.Get full serv manual for your serial.Jon

author: oe7dbhnew
author_rank: Contributor
timestamp: February 03, 2025, 03:40:09 pm
content: Thank You