Has anyone successfully made a doppler radar for measuring bullet speeds using hb100?
>>2957765No, but I made a light sensor for measuring airgun bullet speeds that attaches to the barrel. 2 pairs of 2 IR LEDs at fixed distance, microcontroller on interrupts measures timing, calculates speed.
OP here. that's quite simple but not challenging enough people have used PC sound card for that too, just an op amp, few IR leds and two photodiodes
>>2957765You need to calculate the frequency range for the proposed bullet speeds then bandpass filter and amplifier. Most likely you can filter this out of whole rubbish.
>>2958299Also you'll have to open that box to get behind comparator BC iirc those shitty motion detectors output a meander for the most massive moving object. That wouldn't do . take the signal right from the mixer, filter the needful and perhaps that'll do.
>>2957765did you ask chatgpt? i asked it something about your idea and this is what I got.Yes — you *can* write code for the cheap Doppler radar motion modules (like the **HB100**, **RCWL-0516**, or **CDM324**) to measure BB or pellet velocities… **BUT** you need to understand their limits first.Below is a breakdown of what works, what doesn’t, and an example of how you *could* build a small Doppler-based FPS meter.and it spit out a bunch of code, you should ask it if you haven't
Last Threads: https://warosu.org/diy/?task=search2&search_username=artbyrobotTo begin: the project goal: I am working to make a series of humanoid robots. I am using a Biblical theme of naming the first 3 robots I make Adam, Eve, and Abel. The goal is for these robots to have human body inspired musculoskeletal systems, advanced AI, and that they look human and pass for human to a casual observer at least at a distance. They must be able to walk, talk, run, dance, do sports, do chores, manufacture products, and make more robots just like themselves if not even better. My aim is to build a single robot arm and head and then add sufficiently advanced AI to that arm and head to enable it to build the rest of its own body for me. This way I am delegating the work of building the majority of my first humanoid robot to that robot rather than doing that work myself - and this is to save me time.In a like manner, my goal with the AI is to code just enough AI that the AI can begin coding itself and this way I don't have to code most of the AI myself because it will self create itself. I liken this to building a seed and that seed growing into a tree because for me to code that tree would take too long for me and just creating the seed would then save me time.
Your dad thinks you're a failure. He sees you all the time because you live with your parents, so I don't know why I wouldn't trust him to know. You are a failure. You play daydream make believe around your dumbass narcissist fantasies to try and block thinking about that out. You have never made anything. Even your game bot "goes to another school" and we can never see anything about it.
>>2958395>Do you think he was elite?
>>2958392>someone who has created a fully autonomous videogame robotIs this a WoW bot? I remember someone mentioning you got banned from some WoW spaces. It'd be cool to hear more about this work.
>>2958523ok guys, you need to give him a breatherwe don't want him to stop or scare him awaycan we all be supportive and encouraging for a bit?OPwhat's the latest on your advancements? any big successes recently?
>>2959237>any big successes recently?Rude.
Please wait a while editionPrevious: >>2939599>New to /ham/? Read this shit!http://www.arrl.org/what-is-ham-radiohttps://www.fcc.gov/wireless/bureau-divisions/mobility-division/amateur-radio-service>Your search engine of choice works well too!>The FAQ is now back:>https://wiki.cybsec.io/index.php/HamFAQ>OP, the cybsec domain is gone.>NEW FAQ is updated to preview 15https://files.catbox.moe/aftx43.htmComment too long. Click here to view the full text.
>>2959877Just make something that can use revolver blanks.No point in dicking around with gases and pressure tanks.
>>2959877>but didn't like the idea of the long-term durability of pressurized PVCDon't ever live in a house then
>>2959877>antenna launcher
>>2959877Naw. We use a bow and arrow. But one year a guy used a potatoe cannon with mixed results.
>>2959877Whatever happened to sling shots and arborers weight?
In /rcg/ we discuss anything & everything remote controlled - multirotors, fixed wing, cars, rovers, helis, boats, submarines, battlebots, lawnmowers, etc.>How do I get started with racing drones?https://oscarliang.com/mini-quad-racing-guide/https://www.fpvknowitall.com/ultimate-fpv-shopping-list/> How to build a racing drone (16 part video series from Joshua Bardwell)https://www.youtube.com/playlist?list=PLwoDb7WF6c8mWARrcxtX_G6yytK7QFHID>What about planes?https://www.flitetest.com/>What about aerial photography, is DIY viable?Buy a DJI if what you actually want is to take good photos/videos, go DIY if what you actually want is a fun project.Comment too long. Click here to view the full text.
>>2959715What's a cooler use than strapping an RPG warhead onto a drone and blowing up a fucking tank filled with idiots that think the age of consent shouldn't be lower than 14, retard?
>>2959723Fucking caveman brain here.Get cool tech? Blow it up!
Any of you goys used a DIY L1, L2, L5 GPS kit for a drone off of aliexpress? None of the store pages really have any documentation or explanation on how to configure it. What about RTK, do drone people use that? chatGPT claims that bluetooth gps modules off ali can be put in serial send and a radio module into serial receive and it 'just works'TM with no explanation of how to actually achieve that on a device with a single usb-A cord and no software. So I just buy an antenna, tripod, gps and then radio module and have my own RTK base station?I'm not doing anything with drones (im just soil sampling on foot/vehicle). The best thing for me would be the yuro HAS but I'm an ausfag and it's not available here apparently.
I need a medium RPM (probably not worm drive) small motor with an extended gear toothed drive that has like an 4mm diameter shaft that is 8+ mm long. How tf do I shop for such a thing?
>>2959686>age of consent gets lowered>children still reject (You)NGMI
>DIY youtuber filming & posting their project>they use tinkercadcan someone please help me understand why half of DIY engineering youtubers' go-to 3d modeling program is an imprecise, enshittified mess made for kids?
>>2959747Freecad has been getting some major updates and fixes in the last several months. AFAIK it's still kinda janky, but hopefully this will be it's blender/kicad moment where it becomes good enough to see significant adoption and subsequent improvement.Software subscription is pure cancer. I would be much more comfortable knowing I can still reopen my models after a year.
>>295974750 bucks per year now. I mean i guess thats sorta ok
>>2959747Learn to use a PC.
>>2959838Fusion360 is awful anyway. The wizards that run Autocad are retiring and they can't find anyone that can code that well so they made this shit to replace it.They'll keep jacking he priceup until it's $2000 and then announce end-of-life for autocad
>>2959747On this topic, if I want to edit an STL in fusion 360, why does it bog down with plenty of ram and a 4080? is the online thing really doing all the computation not locally? It's not even that complicated of an stl but it's a major pain making any minor changes.
Bought the garden swing bench years ago—mostly solid, but the chain-on-shackle hinge is weak. Started squeaking, then the chain grooved the shackle. Now it jumps the groove on big swings, making a loud crack. Some swings use nylon spacers; I want bearings instead to make it last. Original shackle’s hard to replace, so I’d sleeve a bearing to fit inside it. Bearings handle static/dynamic loads; bolt is M10.Thoughts on this fix?
>>2957159Op is just going to talk about this and we will never see results. /Dibuy/
>>2956908This is how I'd do it. Just make some thingamajig to attach it. Then you can slide the shackle bolt trough it. Look, it's lubricated
>>2959677Easily the strongest option.
HOWS IT GOING YOU FUCKING FAGGOT DID YOU BUY TVE 6 PARTS ANDHAVE THE GUY AT WORK MAKE THE SEVENTH OR ARE YOU JUST JERKING OFF ALL DAY
Sorry guys I kinda little forgor about this since we are not using the swing in winter months (its 1°C outside right now, crikey!). Also Im on the edge of quitting my job so giving the guy my project and then just leave would be pointless but sure hilarious.
Noob here that needs help identifying the polarity of this capacitor. It's a replacement part for my dryer. pls sars i need de needful
>>2959337>>2959339>>2959360not OP but are there polarized capacitors as well?
it's never straightforward with electronics, the more i learn...FUCKI WISH I HADN'T DROPPED OUT OF HIGHSCHOOLAAAAAAAAAAHI WANNA LIVE IN SHENZHEN AND WORK ON COOL PROJECTS
>>2959380Yes they will be marked
>>2959380yeah, like the other anon said, they would be marked with + abd -also, in dchematics, they should be marked as -)|- and non polarised will be -||- as on OPs photo
Thanks for the replies brethrenWill takle the install later on, hope i dont blow the 90 bucks i spent on the capacitor. Kek had to cut an access panel into the side
I’m looking to get started with welding and would appreciate some guidance. I don’t know much yet, so if someone could explain the basics like the differences between MIG and TIG and suggest where a beginner should start.My plan is to pick up an inexpensive welder from Harbor Freight and look for used accessories on Facebook Marketplace or Craigslist to get going.As for power, my garage has a 30amp line with a 20amp rated outlet, as well as a 240V 40amp dryer outlet on the shared wall. The house has a 200 amp main breaker, with room to upgrade to 300 amps if needed.I plan to begin with a 120V welder and upgrade later as I gain more experience. My initial projects will include basic automotive work, welding exhausts, patching rusted body panels, frame rails, square tubing, and brackets. I don’t plan to work with stainless steel or aluminum at this for now.Thanks
>>2958617>Realistically, most randos have no need to ever stick anything > 1/4" together. thats thicker than truck and trailer frames.This is something that really bugs me about the welding class I'm taking right now. It's mandatory for auto tech and machining students (I'm the latter) but it's totally focused on heavy-duty structural welding bullshit, and apparently is going to become even moreso next year. (Right now it's half stick and half MIG, and they're switching to a full semester of stick.) It's insane to me because the auto students in particular will only ever do MIG or maybe TIG if they have to weld on the job and everything they do is gonna be on light gauges, so making them take a whole class of shit they'll never use while denying them experience with stuff that might be relevant is retarded.
i dont understand getting hung up about what welder or process you should lock into. each had its place and does something another wont. and welders are cheap these days. i have at least 10 including duplicate baby migs and stick boxes which have become my favorite for mobile work if i can find a plug so i dont have to listen to the engine drive scream all day. but i will say once you go big amperage its hard to go back weak penetration
Not OP, but no reason to kill another thread>Want to get into welding >Have some 3mm black steel square tube project>Master S400 Inverter 400V/400A is available for 28€ a weekend>Get rods>Get helmet and gloves>Do some training welds till i get the hang of it>Great successAnything i'm missing? Is there any reason not to get an automatic view helmet, or should one definitely look a bit for a passive one?MIG isn't really an option for me as i don't have options to store gas cans right now and my welding demand over the last few years was probably like three times at a "would be neat" level. In general i find it a bit weird that this hole activity for a newbie is categorised in>100 bucks lego>800+ bucks and be ready to be questioned about your qualifications>unobtainium lasers
>>2959529I want to weld the jack wheel the tongue of my pop up trailer. Do I need to worry about heat treat?
>>2959846>I want to weld the jack wheel the tongue of my pop up trailer. Do I need to worry about heat treat?I wouldn't worry about it unless you burn through a ton or something stupid like that.
3d printing was supposed to be eventually in everyone's home. What happened?
>>2959308In all fairness, they are plug and play till they’re not. Yeah, my a1’s all spit out the benchy after being assembled and powered on. Still I’ve encountered problems I’ve had to troubleshoot and am still tinkering to get the results I want. This is extremely typical as you start to print more than trinkets. . Some people have incredible difficulty for a variety of reasons. There’s many moving parts between software, hardware, filament, and environment in addition to the fact it’s a new technology as far as being widely available to people with varying degrees of technical skill. It isn’t a toaster. That being said, I’m finding success and I’m printing molds with very little technical ability, so yes those people are still wrong.
>>2956820Because normal's would rather pay Amazog $5 for a widget with next day delivery than buy and learn how to use a printer.
>>2959763You are not allowed to use “normal” that is our word. Not even when singing along your favourite rap song. But you can use normie.
>>2956829This, the only good prints come from resin which is messy and emits toxic fumes.
>>2956820Most people used to have their own printers, they can print their own info flyers, that's dangerous, so first they make printers print tracking dots (https://old.reddit.com/r/privacy/comments/1hp4422/whats_the_consensus_on_yellow_tracking_dots_from/) and then they just make it prohibitively expensive for normies to own printers in the first place, cause hey, you could just use printshops, which usually don't accept cash now. Thinking about getting a typewriter IF I can easily /diy/ it os that the distance between keys can be changed easily.
I built this DIY antenna out of an old coax cable. I used some garden snips to cut off one end and strip off the shielding (I don't recommend you do this, it's tedious as fuck and you gotta be extremely careful not to cut off the copper bits) and arranged the copper into a dipole.I can only get 1 channel with this antenna, as this thing can only pick up stuff VHF transmissions that are really strong. I've tried repositioning the copper elements to better receive signals to no avail. This pic is my third version, the copper is bent to try and make it a bowtie.I'll buy an antenna on Amazon, but I would still love advice on how to improve this antenna I made, namely increasing it's effectiveness and picking up UHF signals. I can only do suggestions that can be done easily at home, no power tools, additional devices to buy, etc. Preferably something with aluminum foil and cardboard.
>>2954683rotate it 90 degrees
>>2954495Ayo wassup. You no have no reception without a proper balun. >>2954505>>2954683Deez zesty nigga know what I'm talking about.>>2954505>unidirectional antenna like a YagiDon't get played like this. Yagi is directional AF once you tune the parasites which you can't if you don't have $20 chinese nano vna.Just make a half length dipole or dipole array and make the balun out of some peace of coax( you can use roughly 1/4 of the wavelength although it does not work that way and you don't have the equipment for precise match anyway.)Basically, if you only have TV to test, you can make halflengrh dipole and reflector with the help of tape ruler and add the first parasite based on reception. Don't forget the balun. They look weird AF , don't get too much into theory, you won't understand it anyway. Just google how coax balun looks and slap it on anyway
>>2955427>but ignore claims of distance, they are bullshit. you can't pickup much more than 20 miles.I can consistently get stations from 55 miles away, though that's with picrel mounted outside on the roof.
what are you tuning with
>>2954683What's theoretically the difference between a wet sock, a shitty balun and almost passable balun, in dB and what's the best approach towards a good balun for a TV lover ?Asking for a friend.
DO YOU HAVE A LOISENCE FOR THAT?
kek.Did my own electrical, followed the book (NEC/NFPA 70). Still have to pay for an inspection (because insurance).Sparky doing the inspection says just call if I want a job working for him.MFW, get a job doing electrical.Pic unrelated, but funny.
>>2959385>no because I'm not an asshole.nah, you're just a cuck taking it up the ass from the city while literally everyone else gets away with what you did. you should demand they enforce their regulations equally.
>>2956208>>2956361Afaik>GasRegistered engineers only>ElectricalYou can do it yourself but you're supposed to get it signed off by a qualified electrician for selling etc, but plenty people don't bother>Plumbing and drainage Literally no-one cares
>>2959731>Gas>Registered engineers onlyits just doped and threaded black iron or stupid simple flare nut shitand it runs at sub 1 psiits never mentioned but the leaks that go bang are usually around the meter where they bed the feed line in sand so the gas percolates into the stagnant basement
>>2958769nothing, but not all states in aus let you do that and some of the ones that do still require you to make disclosures (which makes a mockery of the concept of 'as is' and buyer beware)i hate this country so much
how can I make this without actual metal? I dont have a 3D printer btw. And where do I buy the string for this?
>>2952181>>2953930Damn, this reminds me of something. Hey, OP, do you by any chance own a red-blue striped shirt with thin white lines in between?
>>2952181Holy fuggg what the hell am I looking at. So glad I can on /DIY/ today... lmfao Jesus christ.
>>2953930Can you make a second one for me? Ill pay you $20.
put me in the screenshot
>>2952181>>2953930>dat drain plug chainI, too, want to wear that daily.
Does anyone know how to get rid of those nasty fuckers?
MURACIDTICMURACIDTICComment too long. Click here to view the full text.
How the fuck you get fingers in your throat to squeeze a tonsil
>>2958323You have to train your jaw to open wide and accept it without gagging.
>>2959152Sounds gay af.
either>saltwateror>using h2o2 5% solution and gargle it everyday
who hammering
>>2959812I miss mallet man.
Quit halfway through the addition edition https://www.zillow.com/homedetails/7527-Shorewood-Dr-Salem-WI-53168/40334021_zpid/
>>2959505>Imagine taking furniture up those stairs.Maybe if you take it apart first.
>>2959444This is an artform. It should have been a lift. I'd put a mint diy venue or recording studio in the basement.
>>2952354I fucking hate open floorplans.
>>2955710Looks like some shit a high ranking yugoslav communist party member would leave behind.
>>2955713The 45 degree angle fan lmfao
