Cristhian

5.5K posts

Cristhian banner
Cristhian

Cristhian

@odcastro

Ingeniero, Profesor, Diseñador, Músico.

Colombia / Venezuela Joined Ocak 2009
190 Following315 Followers
Cristhian
Cristhian@odcastro·
@i2cjak Why would EE people have the same opinion as a software engineer? EE is mostly physical world, and it's really early there. It's good for firmware, and makes nice simulation scripts for Matlab, etc. But that's about it for now. It won't build you a hardware system. For now.
English
0
0
0
24
i2cjak
i2cjak@i2cjak·
EEs on reddit are chudding out about AI. I believe their last exposure was GPT3. they're talking about fucking local models. they have no idea, we're so early, etc. etc.
English
20
2
231
19.9K
Cristhian
Cristhian@odcastro·
@matseng They worked by separating this in blocks too on the design stage and lots of old manuals have block diagrams and hierarchy. The only reason this kind of schematic exists is for maintenance and testing, and we make them nowadays too when it's needed.
English
1
0
0
12
Mats Engstrom
Mats Engstrom@matseng·
I wonder how many small separate blocks this schematic would have been broken up into if it was drawn today by the current generations of EEs (or hobbyists). I'd guess at least like 25-30. And the blocks would just be haphazardly scattered around the sheet.
Cyber City Circuits@MakeAugusta

English
39
10
303
23.4K
Cristhian
Cristhian@odcastro·
Remember "Prompt Engineering"? 😂
Andrej Karpathy@karpathy

I've never felt this much behind as a programmer. The profession is being dramatically refactored as the bits contributed by the programmer are increasingly sparse and between. I have a sense that I could be 10X more powerful if I just properly string together what has become available over the last ~year and a failure to claim the boost feels decidedly like skill issue. There's a new programmable layer of abstraction to master (in addition to the usual layers below) involving agents, subagents, their prompts, contexts, memory, modes, permissions, tools, plugins, skills, hooks, MCP, LSP, slash commands, workflows, IDE integrations, and a need to build an all-encompassing mental model for strengths and pitfalls of fundamentally stochastic, fallible, unintelligible and changing entities suddenly intermingled with what used to be good old fashioned engineering. Clearly some powerful alien tool was handed around except it comes with no manual and everyone has to figure out how to hold it and operate it, while the resulting magnitude 9 earthquake is rocking the profession. Roll up your sleeves to not fall behind.

English
0
0
0
5
Cristhian
Cristhian@odcastro·
@lauriewired Human progress is exponential, so the earlier the better. No electronics RE tool, but a math RE one. The biggest battery smartphone (Oukitel 33Ah for example) hacked, one slowest process running a low resolution specific magical math book for transcription. Send it to Newton.
English
0
0
0
28
LaurieWired
LaurieWired@lauriewired·
You can send a single smartphone to any point in human history. No instructions. Winner is whoever advances human progress the most. When + where do you send it?
LaurieWired tweet mediaLaurieWired tweet media
English
295
28
1.3K
418.4K
Cristhian
Cristhian@odcastro·
@burkov I don't remember in the 90's reading AIMA anybody could be named expert. That was just an introductory first book to see the range of the field, but then you moved to some specific hard ones for your work, like Vapnik (if you went SVM/NN) or Sutton (if you went RL)
English
0
0
0
98
BURKOV
BURKOV@burkov·
I remember the times when, to be considered an expert in AI worth listening to, you would at least have read this book *at least* once. Now every clown with internet access who asked ChatGPT to generate some Python code and managed to run it thinks of themselves as an AI expert and shares their wisdom with humanity.
BURKOV tweet media
English
92
124
1.3K
69K
Cristhian
Cristhian@odcastro·
@ahadj0 Yep, RTC deals with inference times, but if your problem is the later (servo local control on each motor without the total dynamics or any real time tuning of those control parameters), no AI planning model in the superior level can help with the jerkiness.
English
0
0
0
12
ahad
ahad@ahadj0·
@odcastro makes sense there were recent works trying to address this problem via training the model probably going to try this to see how it works arxiv.org/pdf/2512.05964
English
1
0
0
30
ahad
ahad@ahadj0·
diffusion policy trained on 26 minutes of data (80 demos, 20 seconds each) using DDIM noise scheduler for inference with 10 denoising steps
English
68
33
616
318.2K
Cristhian
Cristhian@odcastro·
@ahadj0 also, if your robot has a local position loop on each motor, and your model works on the trayectory level, your model will never control the jerkiness, because it's produced by local controls that work without the knowledge of the total dynamics of the robot (it's not constant).
English
1
0
1
13
Cristhian
Cristhian@odcastro·
@ahadj0 Well of course in any control loop the sampling time (the time between each cycle of the loop) is critical, and a parameter you cannot avoid to solve from a Real Time processing stand point if you want any model to work. (1/2)
English
1
0
1
13
Captain Brent 🇬🇧
Captain Brent 🇬🇧@Birdseed501·
Probably the first time I (and no doubt everyone else) became aware of this incredible system was seeing it in Thunderball (1965), albeit with a B-17 rather than a C-130. Not sure I’d fancy it either (Claudine Auger is a different matter…😍)
Trev Clark's Obscure Aviation History 🚁@clark_aviation

Fat Albert Scissor Hands? The Fulton surface-to-air recovery system (STARS) was a method of extracting downed airmen or special forces operatives from dangerous areas. It's not something I'd fancy!

English
107
225
5.3K
1.9M
Cristhian
Cristhian@odcastro·
@lauriewired - No recursion - No dynamic memory allocation on execution - No use of try, catch throw. Just use return codes in functions and handle the codes.
English
2
0
26
1.7K
LaurieWired
LaurieWired@lauriewired·
This...is Programming Like a Fighter Pilot. A single unhandled exception destroyed a $500 million rocket in seconds. The F-35 wasn't going to make the same mistake. By carefully slicing C++, engineers created one of the strictest coding standards ever written.
English
57
107
2.3K
377K
Cristhian
Cristhian@odcastro·
@IlirAliu_ This has been standard for simple automotive electronics for decades in combustion engines (very hard conditions). Usually the container is the heat dissipator, like in this little old magnetic marelli module:latinafy.com/products/magne…
Cristhian tweet media
English
1
0
5
596
Ilir Aliu
Ilir Aliu@IlirAliu_·
Soooo satisfying to watch… Most teams underestimate how much reliability work happens after the product is built. This photo shows a small detail that decides if your hardware survives real deployments: An IP67 seal applied directly on the board to protect against water, dust, and vibration. In the lab everything works. On the factory floor humidity, oil, dust, temperature cycles and shock kill weak designs fast. If you want your products to stay alive in the field, bring it to the factory. Your team needs to live in the factory. This is the difference between a prototype and a product that scales. —- Weekly robotics and AI insights. Subscribe free: scalingdeep.tech
English
65
73
836
549.5K
Cristhian
Cristhian@odcastro·
@andrewmccalip I've used EasyEDA + JLCPCB for years now. It's just too easy when working in teams sharing the design (students love it). If you also use parts from LCSC in your design, the prototyping pipeline is complete.
English
0
0
1
209
Andrew McCalip
Andrew McCalip@andrewmccalip·
The user experience with EasyEDA / JLCPCB is mind-blowing. Altium / Advanced circuits is a steaming pile of garbage in comparison, sorry guys. It doesn't take 15 minutes to load, it doesn't cost $20,000. The library, the footprints, everything in browser. It blows the mind.
Andrew McCalip tweet mediaAndrew McCalip tweet media
English
22
17
554
33.3K
Cristhian
Cristhian@odcastro·
@SkyeSharkie Because doing the dishes with precision and adaptability is way, waaaaay more difficult than this. This jumping and crawling gives adaptability, but not that much precision, and you need both for doing dishes.
English
0
0
0
3
Utah teapot 🫖
Utah teapot 🫖@SkyeSharkie·
i wonder why robotics companies would be focusing on high speed movement, crawling and martial arts instead of precision movements needed for things like doing the dishes... i wonder where speed, fall recovery, navigating obstacles and violence are the thing optimized for... hmmmm... HMMMMMMMMM.... i guess the world will never know
Chubby♨️@kimmonismus

At this point, in dont get it anymore. Yes, it looks impressive. But whats the use-case other than proving that, well, it can get up fast and run?

English
898
17.1K
170.9K
7M
Cristhian
Cristhian@odcastro·
@alitajran So.. we keep searching for outlook in google and then select one of the 5 first random links like always?
GIF
English
0
0
0
447
ALI TAJRAN
ALI TAJRAN@alitajran·
NEW: A new URL for Outlook on the Web! Microsoft is providing a more integrated and seamless customer experience and is pleased to announce a new URL for Outlook on the Web: outlook.cloud.microsoft. 𝐖𝐡𝐞𝐧 𝐭𝐡𝐢𝐬 𝐰𝐢𝐥𝐥 𝐡𝐚𝐩𝐩𝐞𝐧: General Availability (Worldwide): The new URL is available now. Microsoft will begin rolling out the redirection from the old URL to the new one. Users visiting outlook.office.com will automatically redirect to the new Outlook on the Web URL outlook.cloud.microsoft. 𝐇𝐨𝐰 𝐭𝐡𝐢𝐬 𝐰𝐢𝐥𝐥 𝐚𝐟𝐟𝐞𝐜𝐭 𝐲𝐨𝐮𝐫 𝐨𝐫𝐠𝐚𝐧𝐢𝐳𝐚𝐭𝐢𝐨𝐧: The Outlook on the Web app will continue to be accessible with both URLs. During and after the migration to the new URL, you may notice the new URL in your browser's address bar, even if you initially accessed the old URL. This change will be on by default. 𝐖𝐡𝐚𝐭 𝐲𝐨𝐮 𝐧𝐞𝐞𝐝 𝐭𝐨 𝐝𝐨 𝐭𝐨 𝐩𝐫𝐞𝐩𝐚𝐫𝐞: Microsoft expects no major impact on how customers use the Outlook on the Web app. If your organization requires URLs to be allowlisted for network access, please ensure the new URL is allowlisted. Also, to ensure a smooth transition, we recommend updating bookmarks, scripts, and documentation to the new URL. This rollout will happen automatically with no admin action required before the rollout. You may want to notify your users about this change and update any relevant documentation. #Microsoft365 #Outlook
ALI TAJRAN tweet media
English
101
59
365
2.8M
Cristhian
Cristhian@odcastro·
@geofflangdale Because the best music business is not owning music but selling millions of guitars to millions of terrible musicians.
English
0
0
1
56
Geoff Langdale
Geoff Langdale@geofflangdale·
Why is it that, instead of running at a savage loss and incinerating money, the people in possession of the Amazing Software Generating Machine don't use it to create huge quantities of commercially successful software? If I had something that could Do Software Engineering ...
Adam Wolff@dmwlff

I believe this new model in Claude Code is a glimpse of the future we're hurtling towards, maybe as soon as the first half of next year: software engineering is done. Soon, we won't bother to check generated code, for the same reasons we don't check compiler output.

English
59
92
1.6K
101.5K
Cristhian
Cristhian@odcastro·
@tailwiinder And it has a closed loop effect. If you use vibe coding to build the important things, vibe coding will stop working, because vibe coding runs on that important stuff ¯\_(ツ)_/¯
English
0
0
1
614
major tom
major tom@tailwiinder·
Lmfaooo
major tom tweet media
English
122
1.1K
24.7K
461.9K
Cristhian
Cristhian@odcastro·
@lauriewired If a Microprocessor is a one chip logic+arithmetic+control unit chip, that system doesn't have one. The arithmetic is done by the I/O chip, and the Program Counter is in the ROM chip. The 4004 is a more complete processor, but at the time the definition didn't exist so..
English
0
0
1
235
LaurieWired
LaurieWired@lauriewired·
27 years later, Holt finally got to release his article! Unfortunately, by that time, the majority of the world had already accepted the Intel 4004 as the “world’s first microprocessor”, hence the confusion. You can read Holt’s original (now declassified) 1971 paper here: firstmicroprocessor.com/wp-content/upl…
LaurieWired tweet mediaLaurieWired tweet media
English
9
25
426
17.8K
LaurieWired
LaurieWired@lauriewired·
The world’s first microprocessor is *NOT* from Intel. But you won’t find it in many textbooks. It was a secret only declassified in 1998; for good reason. The Garrett AiResearch F14 Air Data Computer was ~8x faster than the Intel 4004, and a year earlier!
LaurieWired tweet mediaLaurieWired tweet media
English
33
175
2.1K
86.3K
Cristhian
Cristhian@odcastro·
@arcticinstincts Nobels are not about education systems. It's about research investing and time. Korea was almost medieval just 60 years ago, and is new in the first world game, while other countries were developing the world for centuries. Nothing to do with education systems.
English
0
0
2
149
David Sun
David Sun@arcticinstincts·
Worlds most retarded education system. Twice as much effort/suffering for at best a marginal lead in established narrow fields, while totally failing in creativity, revolutionary invention and mental health Total reform now koreajoongangdaily.joins.com/news/2025-10-1…
David Sun tweet media
Ronald@ronaldlangeveld

This is the most quiet you'll see Korean Airspace. Today is Suneung exams (수능) in Korea which is the SAT Equivalent. Right now it's 13:11, the English listening exam is taking place, so they prohibit aircraft from landing or taking off for the next hour.

English
27
56
644
126.6K

Discover

@i2cjak @matseng @words_salad @lauriewired @burkov @ahadj0 @Birdseed501 @elonmusk