Recent Posts

51

General Technical Chat / Re: EEPROM Marking codes

« Last post by thm_w on Today at 08:31:54 pm »

If it can't be found online, most likely its a custom part number chosen by HP. Since they order mass amounts of these.
What you could do is connect to it with an eeprom programmer and try to detect what IC it is. Some have that functionality. Or map out the pinout and choose a similar part that matches up, then up the size until you start seeing the data loop and repeat.

I don't know if this is relevant: https://h30434.www3.hp.com/psg/attachments/psg/Printing/2868898/1/111reset.pdf

52

Test Equipment / Re: Siglent SDL1000X/SDL1000X-E Electronic Load

« Last post by tautech on Today at 08:29:24 pm »

EasySDL has a reported problem of the time axis, with the time stamp being half of the real time.

Thank you Mortymore 

Do you have EasySDL_V9.2 installed ?
https://int.siglent.com/upload_file/zip/software/DC%20Electronic%20Load/EasySDL_V9.2_EN.zip

I see you had Record engaged, did you set a path for it to be saved to disk, any disk ?
This is a feature I'd love to see fully explored so to be able to graph discharge curves from the recorded data.

Is it Winner-2_descarga_20230813.zip  ?

53

Test Equipment / Re: Siglent SDS3000X HD and upgraded SDS1000X HD

« Last post by Martin72 on Today at 08:25:10 pm »

Dave will certainly soon receive a SDS3000 ...

If he has ordered one, he will get one at some point.
The delivery situation is very difficult, as only those who will pay for it are likely to be supplied first.
As it turned out today, I wouldn't have been able to get one either, despite ordering over 3 months ago.
They sent me their own demonstration device by mistake (hence the missing display foil and dust caps), but I can keep it until a new one is actually sent out.
So I can play around a bit, I've already started it after the acclimatization.
The fan is regulated, that's for sure, it makes a clear noise at the beginning when booting, then it gradually gets quieter and quieter - but not as quiet as the SDS2000X HD.
A few things are different from what I'm used to, and the “basic speed” seems faster to me.
But I'll find out more about that in the days to come, with the report here, of course.

54

Test Equipment / Re: Fun With Low Leakage/Bias Current: Femtompere, Electrometer, Keithley 617

« Last post by HighVoltage on Today at 08:24:40 pm »

Today, I received my  Keithley 617 with very good condition. it was made in 1991 or 1992, and last cal time is 1999. when I power on it, on current and 2pA mode, no input, the read is change from 20 counts to 300. Now, I have work to do. . maybe need clean the pcb first and change the capacitors .

Maybe just place a short on the input and watch it again.
Some charge can caused this,

55

RF, Microwave, Ham Radio / Re: WSJT-X on Pi

« Last post by metrologist on Today at 08:21:54 pm »

I pulled out a new SD card and will just start over.

56

Test Equipment / Re: Enabling options for R&S test equipment

« Last post by Ennio on Today at 08:20:24 pm »

Hi, I have an R&S ETC and I would like to know how to find out the key to unlock the K140 option for DVBT-2 with the hardware already installed, how can I do it since it can no longer be purchased? Thank you.

57

PCB/EDA/CAD / Re: JLCPCB alters soldermask without any notice

« Last post by thm_w on Today at 08:19:48 pm »

Sharp pointed or crown tip pogo pins shouldn't require cleaning of the board. But interesting info regardless.

58

Projects, Designs, and Technical Stuff / "practically smallest" debug connector on tiny pcb

« Last post by Wilson__ on Today at 08:11:19 pm »

Appreciate advises on a 'practically smallest' connector on custom made PCB. For connection to ST-Link debugger 10 pins.  Seem FPC is nice (flex printed circuit board as in Raspberry Pi camera) with a flip tab so FPC cable can be inserted with zero force and last for tens of insert/uninsert cycles.  What are the going-to pitch that is easily available, 1mm or 0.5mm or others?  Many thanks

59

RF, Microwave, Ham Radio / Re: WSJT-X on Pi

« Last post by metrologist on Today at 08:08:54 pm »

Now I'm just getting a big fat finger on a simple upgrade. 

pi@raspberrypi:~ $ sudo nano /etc/apt/sources.list
pi@raspberrypi:~ $ sudo apt update
Get:1 http://mirrordirector.raspbian.org bookworm InRelease [15.0 kB]
Hit http://archive.raspberrypi.org jessie InRelease       
Hit http://archive.raspberrypi.org jessie/main armhf Packages
Get:2 http://mirrordirector.raspbian.org bookworm/main armhf Packages [14.5 MB]
Hit http://archive.raspberrypi.org jessie/ui armhf Packages             
Ign http://archive.raspberrypi.org jessie/main Translation-en         
Ign http://archive.raspberrypi.org jessie/ui Translation-en
Get:3 http://mirrordirector.raspbian.org bookworm/contrib armhf Packages [62.3 kB]
Get:4 http://mirrordirector.raspbian.org bookworm/non-free armhf Packages [118 kB]
Get:5 http://mirrordirector.raspbian.org bookworm/rpi armhf Packages [1360 B] 
Ign http://mirrordirector.raspbian.org bookworm/contrib Translation-en         
Ign http://mirrordirector.raspbian.org bookworm/main Translation-en           
Ign http://mirrordirector.raspbian.org bookworm/non-free Translation-en       
Ign http://mirrordirector.raspbian.org bookworm/rpi Translation-en             
Fetched 14.7 MB in 26s (562 kB/s)                                             
Reading package lists... Done
Building dependency tree       
Reading state information... Done
872 packages can be upgraded. Run 'apt list --upgradable' to see them.
pi@raspberrypi:~ $ sudo apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 libc6-dbg : Depends: libc6 (= 2.19-18+deb8u7) but 2.31-13+rpi1+deb11u8 is installed
 libc6-dev : Depends: libnsl-dev but it is not installed
 libcrypt-dev : Breaks: manpages-dev (< 5.01-1) but 3.74-1 is installed
 libnih1 : Depends: libc6 (< 2.20) but 2.31-13+rpi1+deb11u8 is installed
 manpages : Breaks: manpages-dev (< 5.09-2) but 3.74-1 is installed
 openssh-sftp-server : Depends: openssh-client (= 1:6.7p1-5+deb8u3) but 1:8.4p1-5+deb11u3 is installed
 wsjtx : Depends: libgfortran5 (>= 8.3) but it is not installed or
                  libgfortran4 (>= 7.3) but it is not installed or
                  libgfortran3 (>= 6.3) but 4.9.2-10 is installed
         Depends: libgomp1 (>= 6) but 4.9.2-10 is installed
         Depends: libqt5serialport5 (>= 5.7) but it is not installed
         Depends: libqt5multimedia5-plugins (>= 5.7) but it is not installed
         Depends: libqt5widgets5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5network5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5printsupport5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5sql5-sqlite (>= 5.7) but it is not installed
         Depends: libboost-log1.62.0 (>= 1.62.0) but it is not installable or
                  libboost-log1.65.1 (>= 1.65.1) but it is not installable or
                  libboost-log1.67.0 (>= 1.67.0) but it is not installable or
                  libboost-log1.71.0 (>= 1.71.0) but it is not installable or
                  libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-filesystem1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-thread1.74.0 (>= 1.74.0) but it is not installed
         Depends: libfftw3-single3 (>= 3.3.5) but 3.3.4-2+rvt is installed
         Depends: libgfortran5 (>= 10) but it is not installed
         Depends: libqt5core5a (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5gui5 (>= 5.14.1) but 5.3.2+dfsg-4+rpi1 is installed or
                  libqt5gui5-gles (>= 5.14.1) but it is not installed
         Depends: libqt5multimedia5 (>= 5.6.0~beta) but it is not installed
         Depends: libqt5network5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5serialport5 (>= 5.6.0) but it is not installed
         Depends: libqt5sql5 (>= 5.10.0) but it is not installed
         Depends: libqt5widgets5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libstdc++6 (>= 7) but 4.9.2-10 is installed
E: Unmet dependencies. Try using -f.
pi@raspberrypi:~ $ sudo apt upgrade -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... failed.
The following packages have unmet dependencies:
 libc6-dbg : Depends: libc6 (= 2.19-18+deb8u7) but 2.31-13+rpi1+deb11u8 is installed
 libc6-dev : Depends: libnsl-dev but it is not installed
 libcrypt-dev : Breaks: manpages-dev (< 5.01-1) but 3.74-1 is installed
 libnih1 : Depends: libc6 (< 2.20) but 2.31-13+rpi1+deb11u8 is installed
 manpages : Breaks: manpages-dev (< 5.09-2) but 3.74-1 is installed
 openssh-sftp-server : Depends: openssh-client (= 1:6.7p1-5+deb8u3) but 1:8.4p1-5+deb11u3 is installed
 wsjtx : Depends: libgfortran5 (>= 8.3) but it is not installed or
                  libgfortran4 (>= 7.3) but it is not installed or
                  libgfortran3 (>= 6.3) but 4.9.2-10 is installed
         Depends: libgomp1 (>= 6) but 4.9.2-10 is installed
         Depends: libqt5serialport5 (>= 5.7) but it is not installed
         Depends: libqt5multimedia5-plugins (>= 5.7) but it is not installed
         Depends: libqt5widgets5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5network5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5printsupport5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5sql5-sqlite (>= 5.7) but it is not installed
         Depends: libboost-log1.62.0 (>= 1.62.0) but it is not installable or
                  libboost-log1.65.1 (>= 1.65.1) but it is not installable or
                  libboost-log1.67.0 (>= 1.67.0) but it is not installable or
                  libboost-log1.71.0 (>= 1.71.0) but it is not installable or
                  libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-filesystem1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-thread1.74.0 (>= 1.74.0) but it is not installed
         Depends: libfftw3-single3 (>= 3.3.5) but 3.3.4-2+rvt is installed
         Depends: libgfortran5 (>= 10) but it is not installed
         Depends: libqt5core5a (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5gui5 (>= 5.14.1) but 5.3.2+dfsg-4+rpi1 is installed or
                  libqt5gui5-gles (>= 5.14.1) but it is not installed
         Depends: libqt5multimedia5 (>= 5.6.0~beta) but it is not installed
         Depends: libqt5network5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5serialport5 (>= 5.6.0) but it is not installed
         Depends: libqt5sql5 (>= 5.10.0) but it is not installed
         Depends: libqt5widgets5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libstdc++6 (>= 7) but 4.9.2-10 is installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies
pi@raspberrypi:~ $ sudo apt update
Hit http://mirrordirector.raspbian.org bookworm InRelease
Hit http://mirrordirector.raspbian.org bookworm/main armhf Packages
Hit http://mirrordirector.raspbian.org bookworm/contrib armhf Packages         
Hit http://mirrordirector.raspbian.org bookworm/non-free armhf Packages       
Hit http://mirrordirector.raspbian.org bookworm/rpi armhf Packages             
Hit http://archive.raspberrypi.org jessie InRelease                           
Hit http://archive.raspberrypi.org jessie/main armhf Packages                 
Hit http://archive.raspberrypi.org jessie/ui armhf Packages
Ign http://mirrordirector.raspbian.org bookworm/contrib Translation-en         
Ign http://mirrordirector.raspbian.org bookworm/main Translation-en           
Ign http://mirrordirector.raspbian.org bookworm/non-free Translation-en       
Ign http://mirrordirector.raspbian.org bookworm/rpi Translation-en             
Ign http://archive.raspberrypi.org jessie/main Translation-en                 
Ign http://archive.raspberrypi.org jessie/ui Translation-en
Reading package lists... Done
Building dependency tree       
Reading state information... Done
872 packages can be upgraded. Run 'apt list --upgradable' to see them.
pi@raspberrypi:~ $ sudo apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
You might want to run 'apt-get -f install' to correct these.
The following packages have unmet dependencies:
 libc6-dbg : Depends: libc6 (= 2.19-18+deb8u7) but 2.31-13+rpi1+deb11u8 is installed
 libc6-dev : Depends: libnsl-dev but it is not installed
 libcrypt-dev : Breaks: manpages-dev (< 5.01-1) but 3.74-1 is installed
 libnih1 : Depends: libc6 (< 2.20) but 2.31-13+rpi1+deb11u8 is installed
 manpages : Breaks: manpages-dev (< 5.09-2) but 3.74-1 is installed
 openssh-sftp-server : Depends: openssh-client (= 1:6.7p1-5+deb8u3) but 1:8.4p1-5+deb11u3 is installed
 wsjtx : Depends: libgfortran5 (>= 8.3) but it is not installed or
                  libgfortran4 (>= 7.3) but it is not installed or
                  libgfortran3 (>= 6.3) but 4.9.2-10 is installed
         Depends: libgomp1 (>= 6) but 4.9.2-10 is installed
         Depends: libqt5serialport5 (>= 5.7) but it is not installed
         Depends: libqt5multimedia5-plugins (>= 5.7) but it is not installed
         Depends: libqt5widgets5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5network5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5printsupport5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5sql5-sqlite (>= 5.7) but it is not installed
         Depends: libboost-log1.62.0 (>= 1.62.0) but it is not installable or
                  libboost-log1.65.1 (>= 1.65.1) but it is not installable or
                  libboost-log1.67.0 (>= 1.67.0) but it is not installable or
                  libboost-log1.71.0 (>= 1.71.0) but it is not installable or
                  libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-filesystem1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-thread1.74.0 (>= 1.74.0) but it is not installed
         Depends: libfftw3-single3 (>= 3.3.5) but 3.3.4-2+rvt is installed
         Depends: libgfortran5 (>= 10) but it is not installed
         Depends: libqt5core5a (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5gui5 (>= 5.14.1) but 5.3.2+dfsg-4+rpi1 is installed or
                  libqt5gui5-gles (>= 5.14.1) but it is not installed
         Depends: libqt5multimedia5 (>= 5.6.0~beta) but it is not installed
         Depends: libqt5network5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5serialport5 (>= 5.6.0) but it is not installed
         Depends: libqt5sql5 (>= 5.10.0) but it is not installed
         Depends: libqt5widgets5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libstdc++6 (>= 7) but 4.9.2-10 is installed
E: Unmet dependencies. Try using -f.
pi@raspberrypi:~ $ sudo apt upgrade -f
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... failed.
The following packages have unmet dependencies:
 libc6-dbg : Depends: libc6 (= 2.19-18+deb8u7) but 2.31-13+rpi1+deb11u8 is installed
 libc6-dev : Depends: libnsl-dev but it is not installed
 libcrypt-dev : Breaks: manpages-dev (< 5.01-1) but 3.74-1 is installed
 libnih1 : Depends: libc6 (< 2.20) but 2.31-13+rpi1+deb11u8 is installed
 manpages : Breaks: manpages-dev (< 5.09-2) but 3.74-1 is installed
 openssh-sftp-server : Depends: openssh-client (= 1:6.7p1-5+deb8u3) but 1:8.4p1-5+deb11u3 is installed
 wsjtx : Depends: libgfortran5 (>= 8.3) but it is not installed or
                  libgfortran4 (>= 7.3) but it is not installed or
                  libgfortran3 (>= 6.3) but 4.9.2-10 is installed
         Depends: libgomp1 (>= 6) but 4.9.2-10 is installed
         Depends: libqt5serialport5 (>= 5.7) but it is not installed
         Depends: libqt5multimedia5-plugins (>= 5.7) but it is not installed
         Depends: libqt5widgets5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5network5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5printsupport5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5sql5-sqlite (>= 5.7) but it is not installed
         Depends: libboost-log1.62.0 (>= 1.62.0) but it is not installable or
                  libboost-log1.65.1 (>= 1.65.1) but it is not installable or
                  libboost-log1.67.0 (>= 1.67.0) but it is not installable or
                  libboost-log1.71.0 (>= 1.71.0) but it is not installable or
                  libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-filesystem1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-thread1.74.0 (>= 1.74.0) but it is not installed
         Depends: libfftw3-single3 (>= 3.3.5) but 3.3.4-2+rvt is installed
         Depends: libgfortran5 (>= 10) but it is not installed
         Depends: libqt5core5a (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5gui5 (>= 5.14.1) but 5.3.2+dfsg-4+rpi1 is installed or
                  libqt5gui5-gles (>= 5.14.1) but it is not installed
         Depends: libqt5multimedia5 (>= 5.6.0~beta) but it is not installed
         Depends: libqt5network5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5serialport5 (>= 5.6.0) but it is not installed
         Depends: libqt5sql5 (>= 5.10.0) but it is not installed
         Depends: libqt5widgets5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libstdc++6 (>= 7) but 4.9.2-10 is installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies
pi@raspberrypi:~ $ sudo apt --fix-broken install
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Correcting dependencies... failed.
The following packages have unmet dependencies:
 libc6-dbg : Depends: libc6 (= 2.19-18+deb8u7) but 2.31-13+rpi1+deb11u8 is installed
 libc6-dev : Depends: libnsl-dev but it is not installed
 libcrypt-dev : Breaks: manpages-dev (< 5.01-1) but 3.74-1 is installed
 libnih1 : Depends: libc6 (< 2.20) but 2.31-13+rpi1+deb11u8 is installed
 manpages : Breaks: manpages-dev (< 5.09-2) but 3.74-1 is installed
 openssh-sftp-server : Depends: openssh-client (= 1:6.7p1-5+deb8u3) but 1:8.4p1-5+deb11u3 is installed
 wsjtx : Depends: libgfortran5 (>= 8.3) but it is not installed or
                  libgfortran4 (>= 7.3) but it is not installed or
                  libgfortran3 (>= 6.3) but 4.9.2-10 is installed
         Depends: libgomp1 (>= 6) but 4.9.2-10 is installed
         Depends: libqt5serialport5 (>= 5.7) but it is not installed
         Depends: libqt5multimedia5-plugins (>= 5.7) but it is not installed
         Depends: libqt5widgets5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5network5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5printsupport5 (>= 5.7) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5sql5-sqlite (>= 5.7) but it is not installed
         Depends: libboost-log1.62.0 (>= 1.62.0) but it is not installable or
                  libboost-log1.65.1 (>= 1.65.1) but it is not installable or
                  libboost-log1.67.0 (>= 1.67.0) but it is not installable or
                  libboost-log1.71.0 (>= 1.71.0) but it is not installable or
                  libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-filesystem1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-log1.74.0 (>= 1.74.0) but it is not installed
         Depends: libboost-thread1.74.0 (>= 1.74.0) but it is not installed
         Depends: libfftw3-single3 (>= 3.3.5) but 3.3.4-2+rvt is installed
         Depends: libgfortran5 (>= 10) but it is not installed
         Depends: libqt5core5a (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5gui5 (>= 5.14.1) but 5.3.2+dfsg-4+rpi1 is installed or
                  libqt5gui5-gles (>= 5.14.1) but it is not installed
         Depends: libqt5multimedia5 (>= 5.6.0~beta) but it is not installed
         Depends: libqt5network5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libqt5serialport5 (>= 5.6.0) but it is not installed
         Depends: libqt5sql5 (>= 5.10.0) but it is not installed
         Depends: libqt5widgets5 (>= 5.15.1) but 5.3.2+dfsg-4+rpi1 is installed
         Depends: libstdc++6 (>= 7) but 4.9.2-10 is installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.
E: Unable to correct dependencies
pi@raspberrypi:~ $

60

Projects, Designs, and Technical Stuff / Re: Creating A Track Resistor

« Last post by PCB.Wiz on Today at 08:07:57 pm »

The trace was to operate from -40 to 70 degC but I have no idea as to the Mass it was being attached to.

Did you get a working solution to your December post problem above ?
15 seconds with a trace calculator finds that a 3mm trace, even 10,000mm long is 1.62 ohms,
ie you have blown your PCB area budget, while still well short of your resistance budget.
240W into a board that small, will rocket past 70'C very quickly.