XaiJu
marcoreps

marcoreps

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marcoreps posts

Ultralow Noise Amplifier

Not sure what happened here 🤭 this project started as 'ts80p.prproj' but the soldering iron didn't offer a whole lot of talking material. So instead I started rambling about noise ... for 25 minutes ...

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Mailbag + High Frequency Light Motion Pictures

Mercury Uptime Counters https://www.youtube.com/watch?v=Cxj399LuX1M 

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Quick look inside Advantest R6581T 8.5 Digit Multimeter 😇

Some more photos https://photos.app.goo.gl/qZpnuCFHjcmhG4467

Some light reading about K2002 ADC:  http://41j.com/blog/2019/01/notes-on-the-keithley-2002-adc/ 

If you happen to own a copy of The Art of Electronics: Check out 13.8.6 Designs by the masters: Agilent’s world-class “multislop...

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Harmonic drive rescue attempt

Grafana sample of Solartron 7081, Keithley 2002, Advantest R6581T:  https://snapshot.raintank.io/dashboard/snapshot/9Qa8EBDT4aJ2i2ya1xuwgn7dh5K038qj?orgId=2 

 https://github.com/marcoreps/multiinstrumentalist 

 2020-07-14 10:47:05 +0000 UTC View Post

4k / 508 DPI MSLA Printer: Elegoo Saturn

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0.004°C Temperature Controller

The previous posts are patreon exclusive and because they have fewer than 469 views I would like to encourage you to watch em 😇

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Best high frequency light source ever

@ 6min 30sec U: Unlock

I think that unlocks some of the calibration and eeprom programming functions.

But it needs a password. If you haven't seen it on Discord yet, can you guess what it is?

Hint: It's not 1234 000 password root etc ...

German Strahlenschutzverordnung  https://www.dgmp.de/de-DE/1008/neue-strahlenschutzverordnung-veroeffentlicht/&n...

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Stage 3 gear acquisition syndrome

( = you already have enough gear but it still keeps coming on it's own )

Efratom Division: https://drive.google.com/file/d/1VMWcXvS_yZV_JUP9wHd2FFQ6hZv01kDB/view?usp=sharing

Look what I found about that charge sensitive amplifier:


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No high frequency light in here

Kreosan xray video: https://www.youtube.com/watch?v=fwl1JNoFdhg 

Updated calibrator photo album: https://photos.app.goo.gl/6gq4PChaLmLDDLE38 

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(Almost) firing that big YAG laser

Happy involuntary holidays, hope you are all well!

If anybody wants to come and pick up some YAG laser parts or that entire cabinet, let me know! I only want to keep the long black thingy.

Some almost spoiler free calibrator progress pics - everything with a white dot is new: https://photos.app.goo.gl/NLDhay4cDZ6gujGn7

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Just 2020 things

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High Frequency Light sensor & more

See also:  https://www.youtube.com/watch?v=VFFrQPCQO14 

I had to shuffle some trivial details in this post a bit to keep the sources safe. They are not messing around in the high frequency light business 🕵️

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Solartron 7081 Mods

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Fluke 5700A is alive 🥳

Few more spoilers if you want them: https://photos.app.goo.gl/FDRX3KMmxURfZ9D26

I am documenting and reconstructing a few things here:  https://github.com/marcoreps/5700A 

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TS100C and Fluke 5700

I have a spare board, a TS100 husk and a bunch (not all) of parts. If anybody wants them, leave a comment and I'll send everything to the comment with the most hearts!


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CNC trivia with Haimer and Mahr and µmetres

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Non-festive box opening II


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Non-festive box opening I

Starring: Ludlum Model 12 alpha particle detector / rate meter
And: Coherent laser power meter

Discord;  https://www.patreon.com/settings/apps 

Sampled Y12 vid:  https://www.youtube.com/watch?v=N2pOLpm54sQ 

'Extreme' alpha particle detector variant:  2019-12-24 22:52:42 +0000 UTC View Post

TIG Welder Repair and much more

Those HV film caps are 3 EUR per piece incl. shipping in Germany rn:  https://www.ebay.de/itm/372638744980 

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10 Hour Autobahn Trip

^ and nothing else! Next step will be a careful power on, some cleaning and maintenance, ...

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Productronica Trade Fair in Munich

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30 min Spindle Marathon!

New and improved version!

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Fiber Laser Repair

Wow this one took forever! I kinda made the CNC Spindle video at the same time, so that will also be finished soon. And then I have quite a large backlog of small stories about TIG welders, particle detectors and Japanese high voltage test gear 😵 

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EDITED: Goofing around with a 10k$ Keithley

This is a loaner for now, so no teardown :( But it is a great source of inspiration and motivation.

EDIT: I've added a few more things and will probably make this a public vid right before the fiber laser!

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Fusion Splicer Repair

Outside + Upper floor :  https://imgur.com/a/G5l5SpT 

Lower levels:  https://imgur.com/a/td4QXEw 

Stiched together hi-res schematic WIP:  https://www.easyzoom.com/imageaccess/e30976b7a0d04a04b959f8ce785d2395 <...

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Acrylic CNC part

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Power supply from the TS100 company

spoiler: it's brilliant

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.5µm sensor + .3µm actuator + ~1µm fiber laser

Actual B7000 instructions on the box:  https://www.youtube.com/watch?v=xEsJ3J3H6ZU 


To flip out the top floor of the fiber laser I'll have to unwind some fiber from that slanted spool ... and it creeps me out. My instinct says that it's important, because they wouldn't do that for no reason. But on the other hand the fiber is just held on with double sided tape, so it can't be *that*...

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LinuxCNC + Mesa Card Video

EDIT: Thank you for the feedback! I've smoothed over a few rough edges anyway :)


Guys and gals, is this too boring for a public release? I was aiming for a little demonstration of a LinuxCNC + Mesa setup and its advantages but that made it neccessary to cover all the  basics that probably everybody knows already.

I am adding some oscilloscope jitter histogram measurement and some VFD and servo load displays to the LinuxCNC UI today, maybe that'll m...

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Surface Fish 'n Chips

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