Home Artists Posts Import Register

Content

Friends, thank you for your patience, sorry that this took so long!

Got enough raw footage for 2 more videos 😵

Files

Open Source 8.5 Digit Voltmeter from CERN: Build and Test

Get your high quality PCBs from https://www.pcbway.com/ Win Test Gear at Keysight University Live http://bit.ly/MR_KULive Miniware Hot Plate https://www.banggood.com/custlink/K3KyZe7los Support me on https://www.patreon.com/marcoreps Cool new Brymen DMM https://www.welectron.com/Brymen-BM789-Multimeter_1 5% coupon: marcoreps5 HPM7177 Project https://ohwr.org/project/opt-adc-10k-32b-1cha/wikis/home CERN YouTube Channel https://www.youtube.com/user/CERNTV The Worlds best resistors http://www.vishaypg.com/foil-resistors/ Desktop Enclosure https://www.reichelt.de/de/de/systemgehaeuse-geh-sg-1-19-p50439.html My Multiinstrumentalist datalogging software https://github.com/marcoreps/multiinstrumentalist/ xDevs INL article https://xdevs.com/article/inlperf/ 00:00 Intro 02:25 Circuit Overview 05:18 Assembly 10:19 Soldering 13:51 THT parts 15:47 Mechanical stuff 25:10 Software 31:02 Result

Comments

Peter Stevens

Dam .. and I just treated myself to a 4.5 digit Fluke 8050A from 1979 .. only a few digits off :-)

Peter Stevens

A precision voltage reference with a few standard voltages for calibration would be a useful tool.

Faraz Sadrzadeh

Beautiful video. My question was why didn’t you use LTC2508 as your ADC? I’ve read that it’s a next-level ADC

Mark S

Woww.. That's a hell of a build! I'm guessing you're the first non-CERN engineer to build one of these.

Anonymous

That was 36 minutes?? I didn’t check before watching it, and I thought it was more like 12🙃

Anonymous

Then it would not be a HPM7177 anymore 😉 There are severel reasons CERN decided for a AD7177, one is 1/f noise. If you want to dive deeper into it read the thread @eevblog: https://www.eevblog.com/forum/metrology/hpm7177-adc-from-cern/

Fredrik Hemsen

this was a lot of fun to watch. just a question: was your audio properly normalized? it seemed to me that some parts of your commentary were quieter than others, making me reach for the volume control. looking forward to the in-depth videos to come!

marcoreps

thank you very much for the hint! Indeed I tried a new method ... replaced it now

marcoreps

Got another, more popular CERN related open source project right here, ready to assemble ... it won't take 3 months this time, I promise :)

Holger Scade

Is Piraten Partei still a thing?

marcoreps

Not quite sure! I think they are trying to get weed legalized nowadays?

George Hartt

can you make a video on anodising aluminum? that sounds like fun