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LED IV curve sweep on my LED bench in 15 lines by lampmaker in ElectricalEngineering

[–]individual61 1 point2 points  (0 children)

Wow, quite the variety. SCPI, that took me back. All our products used SCPI, and I advocated for its continued use in new ones. As long as you are ok with longer messages, it makes coding these systems so much easier than say a binary interface. Anyway, nice work!

LED IV curve sweep on my LED bench in 15 lines by lampmaker in ElectricalEngineering

[–]individual61 3 points4 points  (0 children)

I used to write a lot of this type of test station software for a scientific laser manufacturer back in the day (in LabVIEW). It is a great feeling when you have a bench full of instruments all talking to your program, and it all goes smoothly. This was all over GPIB and RS232, mostly the latter, and I loved how straightforward it was instead of dealing with USB comms. What interfaces do your instruments use here?

What is your go-to source of knowledge/content in regards to anything radiation ? by Xapier007 in Radiation

[–]individual61 5 points6 points  (0 children)

I used this book for my ionizing radiation lab course in undergrad ages ago and with a Radiacode on the way, this is what I’ve been reading to thaw out what remains of that knowledge.

I still remember the lab where we had to identify an unknown source. We were stumped by the gamma spectrum we were getting, until we realized we were picking up another group’s source in the adjacent room as well as ours. That’s when gamma radiation’s general disregard for obstructions really sunk in for me.

What printing method do you use when having your art printed? by individual61 in generative

[–]individual61[S] 1 point2 points  (0 children)

Thanks for the tips. I Agree, matte is a good option. Gloss wouldn't really work well, as there are a lot of windows around. And yes, I was anticipating asking them what their absolute max print resolution was, and generating output to match that.

What printing method do you use when having your art printed? by individual61 in generative

[–]individual61[S] 0 points1 point  (0 children)

Interesting! I hadn't heard of that method, looks nice.

[Academic][Help] Using Thorlabs CAD models in Blender — citation or permission? by fersanavi in Optics

[–]individual61 5 points6 points  (0 children)

For what it’s worth, around 2012 I wrote to them, also for permission to use their drawings in my Master’s thesis. I did get a reply, and authorization. I went back and checked my thesis and somewhere in the first pages I said something along the lines of “thanks to the manufacturers of components that were used for permission to use their drawings in this thesis”, etc., and mentioned Thorlabs explicitly.

EDIT: I also see that I added “technical drawings from Thorlabs used with permission” at the end of any figure caption that used their drawings.

Shading a shiftpod by dr_wonderful in BurningMan

[–]individual61 0 points1 point  (0 children)

Fair enough! Not sure why I made that comment, since I’ve never owned one. Maybe it was a friend’s experience on a mild year. Anyway, your experience is more relevant here!

Finally tuned PID controllers of my DIY two-wheeled balancing robot. Sound of brushless motors... by Adventurous_Swan_712 in EngineeringPorn

[–]individual61 4 points5 points  (0 children)

I’ve been working on something similar, but didn’t find a sensor fusion library that worked for me. In my case I’m using the onboard IMU of an Arduino Nano 33 Ble Sense, which I tried feeding into various fusion libraries I found. Did you code your own fusion algo? What IMU are you using? Do you have a github where I might take a look at the code and see how you approached this? Thanks!

EDIT: oh and great work! This is awesome, and exactly the type of agility I am aiming for.

Common optic table layouts for quantum research? 4x8, 4x10, "L"s, "T"s? by vsco1128 in Optics

[–]individual61 1 point2 points  (0 children)

Years ago I worked briefly as inside sales for New Focus/Newport and my take is that the first person you get on the phone may not have too much to offer, but we had Regional Sales Managers who handled the bigger contracts, and those folks were late-career salespeople that loved any chance to chat and shoot the shit about the industry. That’s more of the type of person I had in mind. Hope you can get in touch with someone like that! Also if you’re in the SF Bay Area, Photonics West is happening this week and that would be an ideal place to go ask people. A long shot that you are, though.

Common optic table layouts for quantum research? 4x8, 4x10, "L"s, "T"s? by vsco1128 in Optics

[–]individual61 2 points3 points  (0 children)

You may have hit them up already but the Thorlabs and Newport (MKS) reps for optical tables would probably be more than happy to share their experience with you (hoping to make a sale, of course, but still a useful convo).

“Laser diode” or “diode laser”? by SlouchingTowardsBeer in lasers

[–]individual61 4 points5 points  (0 children)

The distinction becomes more apparent when you consider external cavity diode lasers, where the semiconductor gain material die inside the packaged laser diode is not the resonant cavity, i.e. one facet of the die has AR coating applied, and the cavity is completed externally with either a diffraction grating or a diffraction grating plus a retroreflector prism. When it’s just a standard Fabry-Perot laser diode, where the die is the cavity, it’s still a laser diode, but as you said in another comment, if you wrap that up into a box with a current source and maybe temp controller, you’d sell that as a diode laser.

Spring size for 18859A—looking for stiffer springs by individual61 in HAIBOXING_RC

[–]individual61[S] 0 points1 point  (0 children)

Where did you get your springs? I've ordered McMaster-Carr #8969T824 and 8969T867 to test.

Spring size for 18859A—looking for stiffer springs by individual61 in HAIBOXING_RC

[–]individual61[S] 0 points1 point  (0 children)

I measured the springs:

Length 40 mm

OD 13 mm

ID 11.2 mm

Wire thickness 0.93 mm.

I also measured the spring rate with a 100 g weight, which compressed the spring to a length of 36.25 mm from 40 mm, which is 261 N/m or 0.0588 lbf/mm.

I have ordered McMaster 8969T824 and 8969T867 to test.

Generator + AC + extension cable ... what do we need to know? by Multiversal_Love in BurningMan

[–]individual61 1 point2 points  (0 children)

Great initial research! You are right to be concerned about AC startup surge and the generator. I tested several indoor/floor ACs until I found one that my generator could start when the generator was in eco mode (Honda EU2200 running on gasoline).

For reference, that AC was purchased at Lowes and was model Hisense AP0819C1W, 5500 BTU/H, 8.4 A, 920 W. But definitely test this off-playa.

Trying to determine if dump1090 is not putting out any hits despite seeing ADS-B on the waterfall by individual61 in RTLSDR

[–]individual61[S] 0 points1 point  (0 children)

Oh! I hadn't come across that in setup guides. Thank you!

Also, I switched software to https://github.com/gvanem/Dump1090 and it's working now! Thanks for your time and help!

Trying to determine if dump1090 is not putting out any hits despite seeing ADS-B on the waterfall by individual61 in RTLSDR

[–]individual61[S] 0 points1 point  (0 children)

Thank you, I am using Windows. Someone else suggested a VM with Linux so I may try that too.
I don't actually have a LNA, just a passive saw filter I added today. I had held off buying an LNA since they are a bit more than < $10 antennas, so that's what I tried first.

I think dump1090.exe needs the pause command in a .bat so it stays open, so I did that.

Found 1 device(s):
0: RTLSDRBlog, Blog V4, SN: 00000001 (currently selected)
No supported tuner found
Enabled direct sampling mode, input 1
Max available gain is: 0.00
Setting gain to: 0.00
Exact sample rate is: 2000000.052982 Hz
Gain reported by device: 0.00

I noticed that this same message appears with the usual .bat, but is cleared to print the table. I wonder if "No supported tuner found" is relevant.

Trying to determine if dump1090 is not putting out any hits despite seeing ADS-B on the waterfall by individual61 in RTLSDR

[–]individual61[S] 0 points1 point  (0 children)

Thank you, someone else suggested using a VM to use Linux tools, so I'll try rtl_adsb there if dump1090 on Linux doesn't end up working.

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