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20 hours agooof ow my bones why do my bones hurt?
–a man sipping a bottle labeled “bone hurting juice”
[redacted] enthusiast, robot combat enjoyer, distressingly Appalachian, father of ninjas
- 2 Posts
- 122 Comments
Joined 2 years ago
Cake day: October 8th, 2023
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Gemini helps a guy increase his google cloud bill 18x
Slop can never win, even at being slop. Best they csn do is sloppy seconds.
Follows the AdjectiveAnimal template. Im sold!
This is a banger of a metaphor
In the future, I’m going to add “at scale” to the end of all my fortune cookies.
Before: You were eaten by a grue.
After: Oops, All Grues!
Throw in the rust evangelism and you have a techtakes turducken
Watching this guy fall apart as he’s been left behind has sure been something.
Ask HN: Can you patent prompts?
The stakhanov we have at home
Be careful my pal says the engines tend to fall off!
I’m holding out for the Lockheed-branded Atari Lynx clone thats made from surplus R9X knife missile parts.
A rare W for the Tennessee General Assembly:
https://www.wkrn.com/news/tennessee-politics/bill-targets-ai-hurt-manipulate/
New conspiracy theory: Posadist aliens have developed a virus that targets CEOs and makes them hate money.
Boilermakers gonna boil water i guess
be elon musk
binge ket, adderall, and ST: Voyager one weekend
burst into monday morning SpaceX board meeting after 3 nights of no sleep
crash into table
get a nasty wound on scalp
it’s bleeding pretty bad
stand atop board room table and shout “We must RETVRN TO AMPHIVIAN”
also we’re nameing the next crew Dragon capsule “Admiral Janeway”
everybody claps
Not sure, but it tracks, doesn’t it?
I’m not sure, alas. I’m only a hobbyist. It seems that improved brushless motors is a direct follow-on of the mass production of high-strength rare earth magnets, the motors being my main point of contact. (you can also draw a straight line from this to the rapid development of drones and quadcopters when combined with high capacity batteries, as you pointed out. )
In my experience, pinning down exact comparisons between brushed and brushless motors is a source of frustration since brushless torque curves behave counterintuitively at low speeds, e.g. the second chart you see here:
https://www.fingertechrobotics.com/brushless-torque.php
That behavior is why you can’t find a torque vs current draw curve for brushless motors. You can get an estimate based on kV values, but again, it is very speed dependent.
In terms of practical experience, and for speed ranges that you’ll see IRL, brushless tends to give you substantially more torque per unit mass while running quietly and with higher efficiency to boot.
I see it on my current bookshelf project, and I’m cheap so my tools are low-end stuff I could scrounge or find on sale. My old-school brushed Black and Decker 18v drill chugs when drilling holes in the old recycled hardwood we’re using for the project, wheras the brushless Ryobi 18v cuts through like it’s nothing.
Based on what I’ve seen in my fighting bots, a drop-in replacement would get you get roughly a 50% boost in torque for a similar weight of motor at the speeds concerned, unless you wanted a low speed brawler and didn’t want to gear the motor up much, in which case stick with brushed.
Sorry to carry on, it’s a whole thing!
–a man sipping from a bottle labeled “bone hurting juice”