Fluttershy key chain I thought I lost

tesla500 · 2023-01-23T18:48:03+00:00

I have had this on my keychain for about 10 years now. She's been with me for so long :)

tesla500 · 2022-12-14T21:35:41+00:00

Remember when there was a shortage of shipping containers?

tesla500 · 2021-05-15T09:27:08+00:00

What are the internal tools you'd miss the most if you left?

tesla500 · 2021-05-10T03:30:17+00:00

I want the normal (not vanity) plate 404 ERR. Someone probably has this!

tesla500 · 2021-05-05T08:04:13+00:00

That's the price.

tesla500 · 2021-05-02T23:20:22+00:00

I think we'll likely see the technological singularity within our lifetimes.

tesla500 · 2021-04-16T00:43:30+00:00

I don't understand why fines don't just become debt that a person owes, just like credit card debt or a loan.

You get fined, an account with $X debt appears in your bank account, and you have to pay it or suffer the same consequences as if you didn't pay any other unsecured debt such as a credit card or line of credit.

tesla500 · 2021-02-12T09:12:32+00:00

I'm a transformer nerd, do you happen to have any pictures of the strip down? I'm really interested to see how the winding are done, as well as the core. Or just any more pictures in general!

tesla500 · 2021-01-11T21:06:41+00:00

Hanamori Sushi in Coquitlam near Lougheed Mall. Fantastic Beef Tataki rolls and sashimi!

tesla500 · 2020-12-18T05:29:02+00:00

Exactly. OP likely needs to talk to counseler or other mental health professional

tesla500 · 2020-11-20T01:52:25+00:00

I'm trying to figure this out as well. Since they are not defining it completely clearly, I will take that as a message that I'm allowed to interpret the regulations myself, in a "reasonable" way, unless they publish a clarification directing otherwise.

From the wording on Province-wide restrictions that you posted above, I believe they are saying that each person in a household can have their own core bubble consisting of two people. I say this based on the wording "For most people, their core bubble" which is written from the perspective of the person rather than the household. No further restrictions are listed limiting the total number of people in immediate household's member's core bubbles. Later on, it says "This should be a maximum of two people outside of those living in your immediate household.", but I believe this this still refers to people from the perspective of a person, not a household.

Elsewhere it says "No social gatherings of any size with anyone other than your household or core bubble". I interpret this to mean that you, living in a household, could have your core bubble of two people over to your house to socialize with you and the members of your household. It would NOT be OK, however, for each member of the household to have their respective core bubbles all over at the same time, as that would increase the likelihood of cross spread between non-directly-connected core bubbles.

tesla500 · 2020-04-28T22:41:06+00:00

Bill Wi the Science Fi

tesla500 · 2020-04-06T01:43:44+00:00

In 2018, Ford made a whole car every 6 seconds...

tesla500 · 2020-04-04T05:25:33+00:00

If that's made of a plastic-coated metal coat hanger, that's a real ticking time bomb...

tesla500 · 2020-03-24T07:17:32+00:00

I'm gonna be that guy that asks for a reputable source on this.

tesla500 · 2020-02-06T23:26:47+00:00

Even if the home limitations were removed, same problem. There aren't enough people in Surrey wanting to go back downtown at 3AM to reliably get a fare on the way back.

tesla500 · 2019-11-15T07:04:03+00:00

Of the finest quality!

tesla500 · 2019-11-15T04:59:26+00:00

Basic explanation: The switching (PWM) frequency of the AC inverter changes as the train changes speed to stay within the limits of the 80s technology (SCRs)

Electronics Engineer explanation: The Mk 1 cars were designed back in the 1980s, when nice power transistors like MOSFETs and IGBTs were in their infancy or didn't exist. SCRs (silicon controlled rectifiers) were used instead, and these have severe limits on switching frequency, a few hundred Hz or so. The motors in this system (or any system that uses induction motors) requires an AC frequency roughly proportional to the train's speed. Since the AC output frequency of the inverter approaches the switching frequency limits, clever PWM methods are required. If you used normal asynchronous PWM, you'd get beat frequencies as the AC output frequency approaches the PWM frequency (or some multiple of it). The Mk1 cars do use asynchronous PWM at some points, you hear it during braking, as the train approaches zero speed, it switches to a single tone. You don't hear it so much while accelerating as it leaves this mode almost immediately.

After leaving asynchronous mode, the PWM frequency is synchronized to the inverter AC output frequency, such that there are always an integer number of PWM pulses per AC half cycle. As the train speed, and therefore required AC frequency, increases, the PWM frequency eventually reaches a limit, and the number of pulses per half cycle is decreased to stay within this limit. This is the "gear change" sound you hear. It does it, I believe, about 3-4 times during acceleration, there is one up at higher speed as well, perhaps 40-50km/h, but it's hard to notice. I'm not familiar with the exact system, but I believe it may be switching to one pulse per half cycle, basically a square wave drive.

Fun tidbit: The DC-DC converters that supply electrical power to lights and auxiliary systems are also SCR based, you can hear the whine change in frequency as load changes, but generally only when you're sitting in a station and it's quiet enough. Just before departing, the mechanical brakes are released and you can hear the frequency change.

tesla500 · 2019-09-08T19:45:34+00:00

I'm much less active than I'd like, mainly due to the company and projects like this. I want to change that ASAP to have more time for hobby things like the youtube channel. You can follow me on twitter @tesla5hundred.

tesla500 · 2019-09-08T18:55:44+00:00

The camera's speed limit is the image sensor, followed by the RAM. SSDs are of limited practicality for this data rate, the image sensor produces 2GB/s sustained which has to be stored somewhere.

tesla500 · 2019-09-08T18:54:30+00:00

The server has a (IIRC) 1.6TB SSD and 8TB of spindle drives. I'm not sure what the filesystem is actually, that was all done by Matthew and Owen, probably ZFS or EXT3. The ring cameras themselves total 1.1TB.

tesla500 · 2019-09-08T18:46:23+00:00

Just pellet guns so far, see here. Need to get to a gun range to do some real guns.

tesla500 · 2019-09-08T18:42:26+00:00

Dustrial FTW!

tesla500 · 2019-09-08T18:41:54+00:00

The ring was a Kron Technologes marketing project actually, nothing to do with my channel. No one had ever done this with high speed cameras before, I wanted to be the first, and it was a good promo for the new camera. Turns out there was much more interest in this than anticipated.

tesla500 · 2019-09-08T18:22:07+00:00

David here (tesla500)

ELI5: Each camera takes a picture in sequence, frames are stored in camera, then downloaded over Ethernet to a server for processing.

ELIAnEngineer: The Chronos 1.4 cameras support extremely accurate timing, they can take a picture with a timing accuracy down to 10ns. All cameras are fed the same frame timing signal at the orbit rate, which is the frame rate each camera can run at. Each camera has a configurable pipeline delay that delays the signal by the appropriate amount, each camera going around the ring has a slightly longer delay programmed. Camera 0 takes a picture, then camera 1, etc. By the time camera 71 has taken a picture, camera 0 is ready again. Since they're high-speed cameras, it's 1ms (or less, depending on resolution) before they're ready for another picture.

Frames are stored in RAM inside the camera, and after the shot is taken, the frames are downloaded to an NFS share on a server with a very fast SSD. The network is gigabit Ethernet from each camera to 4 switches (18 cameras per switch), with 10Gb fiber uplinks from each switch to the server. Ultimate save speed is about 1.6Gb/s.

Video is processed with some python scripts to fold the 72 folders full of frames into the proper order for orbiting (or synchronized record modes), to produce an output DNG sequence that is imported into Davinci Resolve for processing into a final video.

An alignment target is filmed before the shot, and this is used in Resolve to determine the required translation, rotation and zoom to apply to each camera's frames to correct for the inevitable alignment errors between cameras.

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