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Old thread is no longer bumpin' >>3002473>I'm new to electronics. Where to get started?It is an art/science of applying principles to requirements.Find problem, learn principles, design and verify solution, build, test, post results, repeat.Read the datasheet.>Comprehensive list of electronics resources:https://github.com/kitspace/awesome-electronics>Project ideas:https://hackaday.iohttps://instructables.com/tag/type-id/category-technology/https://adafruit.comhttps://makezine.com/category/electronics/Comment too long. Click here to view the full text.
>>3013208>>3013215I understood that 15 V from the transformer would give me more leeway, as the linear regulators (LM317/LM337 or LM7812/7912) require 2-3 V headroom, and there are also 2 diode drops from the rectifier. But higher voltage -> more power wasted as heat, I guess.If the regulators are theoretically able to supply 1.5 A each, then I guess I should size the transformer for that - so 36 W, or a required transformer rating of 72 VA assuming a power factor of 0.5? (Which is worse than reality, I think.) It's for a modular system that will grow over time so the power requirement isn't fixed.>>3013215I am indeed using the circuit in your pic for the power supply I use right now, but I have a bunch of digital stuff that will disproportionately draw more power from the positive rail than the negative. I understand that this asymmetry will cause a DC bias in the transformer and is overall not good. I plan to also use a +5 V linear regulator on the positive side to provide a 5 volt rail also.
>>3013223I’d consider using an additional winding as a logic supply. Especially if you’re going to end up with 5V above your ground rail, there you’d be able to use a lower voltage winding. Though +/-2.5V has its upsides as well. If you can stick to 4000 series logic for all your digitals, it could run at significantly more than 5V, though I don’t know about 24V total.
>>3013223forgot to mention that, if you dont wanna pay Digikey prices, google surplus electronics shops in your townyou''l save so much, your bank balance will actually go up
>>3013205I like this kind of transformer, sometimes you can take it apart and there might be enough room to add an extra winding for for very low current -15 V rail to power something like op-amps.
>>3013239I guess I could even use a cheaper switching supply for the 5 V digital stuff that won't care about switching noise. As it happens, I just picked up a 12V to 5V DC-DC converter at a very cheap price, so I might end up using that.>>3013242I scrounged multiple laptop power bricks from work that are all probably slightly the wrong spec for this application.
Ask machining questions, post machining failuresCAD CAM talkSpeeds and feeds guessingG-Code, M-Code, Bro-CodeFanuc vs HaasBitch about payIgnore SeigWhine about spline shaftsButton pushers who think they're machinistsOld thread no longer bumps >>2970554Thread theme: multi machines
>>3013099fwiw the downturn the other anon is talking about happened long enough ago that most of the machinists from that era are long-retired anyway. Ones you known now would be part of the relative few that found work after that. Things also seem to be on an upward turn for machinists now though, seems like everywhere I go I run into companies that are opening up in-house machining departments because they're sick of outside suppliers bottlenecking production or because they've got big new defense contracts that stop them from having stuff made overseas or by shops that aren't set up for ITAR etc.
>>3013196metals rennaisancethe learning curve is affordably at home in a lot of ways now that VR training is getting bigger tooPlus home hobby has never been cheaper.Market downturn makes domestic scrap cheaperleatherworking has seen a boom like this too
>>3013196And sick of working with China. China goddamn fucking sucks and always tries to fuck you. They'll sell you a $40k dollar fucking wonderlathe that can do some crazy numbers and you get out of spec bullshit shipped to you if you're lucky. Glorified scrap if not.
>>3013226VR training is an interesting prospect but I'm not sure how effective it'd be. There's a lot of feel stuff that I think would be a struggle (even just getting used to the right amount of pressure with calipers or mics) and I also think learning machining is just such an overall infodump that it's really hard to learn it at your own pace and without somebody else both holding you accountable and giving you real feedback. Incidentally that's also why going to school for it is such a force multiplier compared to on the job training/experience and thankfully a lot of employers are realizing that lately and hiring straight out of schools for decent jobs, which absolutely wasn't the case even 5 years ago. (I've actually watched it happen in real time over the last year myself.)>>3013227Yeah, that's a big part too. People are realizing the cost and lead times aren't worth it if the parts aren't good enough. I'm personally switching into machining from a job where I was on the other side, having parts made by outside machine shops, and we dealt with the same stuff and came to the same conclusion ourselves.
>>3013227>40k dollar fucking wonderlathevs a $125k haas or $160k pumano shit its gonna be a project ass or grass nobody rides for freet. wants a $45k chinkshit robodrill ripoff
Last Thread: >>3008378Halloween costume edition>Your print failed? Go to:www.simplify3d.com/support/print-quality-troubleshooting>Calibrate your printer.ellis3dp.com/Print-Tuning-Guide/teachingtechyt.github.io/calibration.htmlIf that doesn't help you solve your problems, post:>A picture of the failed part>Printer make & model>Filament type/brandComment too long. Click here to view the full text.
so how's snapmaker u1? still worth it in current_year?it seems to be more open than the average locked down chinkbox, with some custom software and hardware projects that even get official support from time to time. the baseline characteristics arent great - 100C bed, extra enclosure needed on top etc - but 4 nozzles is neato and there's a lot of community activity when it comes to modding etcseems like a decent model if you want a baseline multi-nozzle printer that you can then meaningfully extend, although you'd probably NEED to extend it somewhat if you want ASA, TPU etc.
>>3013169Like >>3013176 suggests, but the Snapmaker U1 is good and user friendly too.>>3013202Reliable plug-and-play printer for PLA, PETG, TPU. Buy/make the lid and it will do ABS/ASA, but without an actively heated chamber it won’t be brilliant at that. Definitely doable to add a chamber heater. If you want to feed it filament from a drier, I think you need to modify the filament feeders a bit too.It’s an early generation toolchanger, but as we’ve yet to see an INDX-style nozzle changer that’s reliable, I think it’s still the best choice. Maybe the FlashForge toolchanger comes close, but it’s more locked down and more of a PLA-only machine than the U1.I await Snapmaker’s next update to the U1, or a toolchanger from Qidi.
>>3013207For ABS I've only used eSun ABS+HS and it's amazing in my P1S without a heated chamber. Though the bed temp is like 100 so it'd provide some kind of chamber temp. It's actually been way better than their PETG+HS and PETG in general for me too, better print quality, way faster printing/more flow, and way less warping during printing
honeycomb infill FTW!
>>3013168>2-phenylethyl-beta-D-thiogalactoside>also known as PETGahahaha
I'm a older webdev shitter who is looking to switch to a mechanical trade.Even though they were primarily looking for people with previous work experience in similar fields I actually got invited to an interview for a paid apprenticeship and did well enough, now they want to invite me over again to check my basic manual skills before offering me a contract. (I didn't hide or lie about my background or anything.)Is there any source I can use to at least gain some very basic knowledge on tools and methods or way to get some practice in? Any tips to prepare for something like this?Am I about to embarrass myself while young mechanics get to laugh at me?
>>3001755can you write programs for machines to cut things?
>>3008813no his dainty code writing fingers are going to be juiced between the jaws of a machine soon
>>3008813>>3009428>no his dainty code writing fingers are going to be juiced between the jaws of a machine soonOP here, unfortunately I didn't get the job
>>3003957>how old30sThanks for the advice. I'm not in the US but I've actually considered the military because the benefits here are not too bad and they even offer civil paid training as well.>>3002938Sorry forgot to add you to >>3010635
Cool
what is best why to Remove&Replace rock when doing plumping etc repairs?Tear off the whole shit and replace with new full sheets?Use fancy little recipo saw to carefully remove pieces then glue and screw wood to back side to use same piece of rock to patch?Buzz down center of studs using straight edge and sheetrock dremel?cut along stud with rock-saw then add 3/4" new wood to support new rock?Other?Case by case?
>>3013117good tipsOP here, I'm an actual carpenter but do very little rock and basically no repair stuff.I like big rock saws.https://www.drywalltooldepot.com/Walboard-15-Drywall-Saw-Extra-Stiff-Blade-p/drywall-saw.htmI zip tie one of these for pouch for small standard size keyhole rock saw. https://www.walmart.com/ip/Hyper-Tough-Small-Vehicle-Engine-Funnel-Htsmf-2020-GrayKeeps saw teeth from cutting bags and keeps dust out of bags and keeps hands clean and not all dried from rock dust.
>>3012810That's drywall dumbass
>>3013193real tradesmen such as myself use only one syllable
>>3013193He's trying to shorten sheetrock. He probably wanted to do the /ck/ thing and say 'ock but then we'd make fun of him for handling cock.>>3012810Cut out to a stud if possible and/or use furring strip or 1x3/1x4 like in the pic. If the hole is larger than maybe 12 inches each way definitely go to the stud unless you can't because of a cabinet or whatever.
>>3012810>>3013252Also one of these sum'bitches with a flush cut blade(second from right) makes a really clean straight cut with basically zero effort. Pretty much every tool brand makes one depending on your flavor of battery, harbor freight probably sells a corded one for about $30 if I had to bet.
What happened to small simple homes? I'm doing a few things for my grandmother at her house and I'm just amazed at how simple everything is. It's a rectangle with a living room, a kitchen and a few bedrooms. Everything is easy to work on, there's very little wasted space, etc. It has a great big backyard too. I know this is /diy/ and I apologize for asking here, but have we lost the plot with new homes? Seems like the goal now is to build such a big house that you no longer have to see each other. Were people just happier with less?
>>3013235She must be in an absolute shithole area. I'm currently getting an 860-ft^2 house built for 220 k$ near Wilkes-Barre, PA.
>>3013235she didn't go to contractors, she went to buildersshould consult an actual general contractor that does whole house remodelshe'll hire plumbing/electric/hvac for 80kfoundation and concrete walls: 20k (idk probably less)framing (20k)team that handles trusses and shit (20k)roofing, stucco, drywallers, floor install, painters (50k)oh and lot has to be leveled, graded, etc, then landscaping (20k)do you want irrigation? probably notcabinets and countertops? (15)those are pricing i'm imagining for small service outlets. the builders get them for 1/3 the pricethen his 1.4x markup for his wagestill 330ki'm assuming permiting costs included but need an electric meter or pole, water meter, well?Comment too long. Click here to view the full text.
>>3013237>Go someplace with unions? double itI think this is a part of the problem given she's in New York. I suspect maybe she did consult a builder instead, but 2 advertised themselves as contractors. The companies were all insisting she needed the costliest materials for >>>winterizing the houseAnd drive way and land-scaping was not included in the estimates she got. I think these "contractors" were taking advantage of her since she was by herself too. RIP brother in law.
>>3013241>>>>winterizing the houseyeah depending on the county in new york, really everywhere now, requirements to pass permitting are just tediously expensive justifications for government jobsyou can consider private provider inspectors, those started in lots of places during covidthey'll pass anything, but you have to be immensely confident in your GC upholding actually important standardsfor most people it isn't worth the riskbuilding economy is fucked, government oversight is fucked
>>3010287This. Can't find a cheap anything to live in that a nigger and mexican hasn't bought yet. Houses, Old Schools, Old Churches, Buildings in the downtown area, etc. If it's cheap and has a roof, its gone.
questions that dont deserve a new threada place for retards to conversethread theme: silly projectsold thread >>3007669
>>3012179probably, maybe, some of the stubwalls around doors and bathrooms could come out, plumbing would be the biggest concern
Bedroom has this wall light that uses a pull chain on the fixture and it's been broken for years, getting sick of using a lamp when this should be working properly. I'm considering a project to swap from pullchain to a light which uses a switch on the wall. I seen a couple videos on YouTube and it doesn't look impossible past sourcing the tools/supplies. Should I just talk myself off the ledge and get an electrician or could a retard do this (myself)?
>>3012958It all depends on where the wire for that lamp is run. If you have to start removing drywall and running new line to get the wire over to where you want the switch you are in for a world of hurt. 'Cause now you have to know how to do drywall and have a right angle drill if you want to do it right.You could just fix the lamp. Or you could just get a lamp controlled by a wireless switch.
>>3012958>>3012974or you could just replace the lamp with another lamp that works and has a button on it so you don't have to fuck with drywall and switches or fixing an old ass lamp
I am in a position to finesse a 80pc wiha set with the case and wheels new. Morality aside would I find actual use for these even if I’m not an electrician? Current job has them but for no real good reason other than they can.I don’t really wanna steal to sell I’m not a crack head. Even if it’s about 2k worth of new tools.
Hi frens. I'm painting an interior bedroom, and messed up by kissing the ceiling with the paint roller a few times. I want to touch up the ceiling paint to even it out back to white, but I'm unsure of whether I should:A) Cut in on the whole ceiling all the way aroundB) Cut in only around the patches of wall paint on the ceilingC) Try to carefully paint over only the wall paint without cutting in normally at all.Pic relatedI can't re-do the whole ceiling right now.Which one makes the most sense?
b, and this time use tape
>>3012642paint the whole ceiling or it will look like assor just slop paint on the roller taps you left on the ceilingor just paint the ceiling the same color as the walls, white ceilings are overrated
If the ceiling is new, feather the touch up. If it's old, paint the entire ceiling.
>>3012642A but in another color
>>3012642I ain't your friend, pal.
my foochin neighbor decided to raise animals inside a residential area. his "ventilation" spot is directly aimed at my windows. i can't keep the smell out nor let fresh air in. i put up with it for almost a year and suffered a great deal. now i want to fight fire with fire.
>>3012686Not very jesus-like of you.
Have you tried talking to him?
possibly the worst thread of all time
>>3009842This. My area has a requirement that areas zone as farm need at least 10 acres to have livestock and non-farm area are not allowed livestock.
>>3012686Someone should put an ice pick through your brain
Hello anons, Its my first time posting on here. Looking at getting a generator to power my house if I lose power this winter. I just need to power some freezers, a furnance fan and tv, charge phones and stuff. Nothing big. But i live at 7500 feet and will be running it on propane, both things cause power output loss I believe. Any one have recommendations or experience with generators and high altitude? Thanks.
>>3012733I have gas for it as well, but my 55 gal tank is in my truck bed, figure i can use gas or my 100gal hankhill tank. but think I need to do something to the carb so it can get more 02 or someshit.
>>3012733Just put a turbo charger on it.
Get a honda EU2000, get the .6 mm (IIRC) jet, never worry about it again.
Buy one rated at a higher output and assume a lower maximum. Unless it's turbo or supercharged, you're not getting around the altitude (lack of oxygen) problem. It's the reason older IDI diesels started getting equipped with turbos.
is this a feasible design for diy nocturnal pissing technology?
>>3012962Just piss in a 25 liter jug like a normal person goddamnit
Just use a bedside shop vac like a normal person
>not using a piss drawer
>>3013217just make bottom of the drawer steel and angled downwards, leading outside and there you have the piss drawer
>>3012962One wrong move and you're impaling yourself on a fuckin pisspipe just because you rolled funny on your bed.Pass. Just get up and go to the bathroom you fuckin' animal.
Winter Is Coming Anon. Are you ready? The time for Lumberjack Testosterone is upon us.How many cords will you burn? Do you buy or buck? Show us what you are working with: Splitters, Chainsaws, Axes, Mauls, & Saws. What are you cutting? What are you burning? Where & how are you sourcing? What are you burning in; make, model, year?
>>3012966well fuck, burning these is WORSE than straght up wood?
>>3012966Just throw one in every once in awhile and burn normally between times. This normal burning should keep any weird buildup at bay.
>>3004582What's a good retard-proof woodstove that you can use to heat up a small/mid sized room, cook food, boil water, and doesn't need much maintenance when setup? Something that won't burn down your house/cabin if you decide to sleep for 6 hours.
>>3013035if price is a concern a defender 1100E can be had for about $700. the only negative in your list is that the top isnt one-level flat all the way across, so it doesn't have a full size cook surface. I think jotul and morso make models with a larger cooktop, but they are pricy. defender is plate steel. cast holds heat better for actual heating purposes.you can get a full-on wood cookstoce, but they are pricy. we have one (OP). it is a built-in masonry style. freestanding is more common. check Lehman's for current production models and pricing. woodcookstove.com is also good.it really depends on your price target first then space, then how often you want to use it for cook vs heat, and finally what size space it needs to heat.units made after 2020 are FAR more efficient and chew WAY less wood ber BTU of output.
>>3011819what are you even talking about retard, stfu and go takke the 5th grade physics class you;ve missed.
I’m a sign holder, who stands on the street corner, trying to spread a message. However, my arms get tired when I hold a sign for over an hour. How can I go about this?The sign needs to be held up in the air high, or else a lot of cars won’t see the sign.Legally, it cannot be on a stick that touches the ground.I was thinking of having it stick out of a backpack. How can I realistically go about this?Or, do you guys have any other ideas about how I can get a sign above my head?
>>3012818>Go to army surplus store>Buy cheap external frame backpack>Zipties
>>3012818extend the pole and stick it in your pants from the back. run it through your shirt for extra security so it hugs your back. and if you really want to secure it better. attach a hook to the end of the stick and clench onto it with your butt. will gain glute strength doing that. you want people to follow you, you gotta prove you believe in your own message.
>>3012818Usually a flag carrier has a sling to carry the weight of the sign. But hey go on and strap it to your torso.
>>3012818>Or, do you guys have any other ideas about how I can get a sign above my head?Get baggy clothes, then bend a pipe so it runs parallel to your arm hidden under a pullover, all the way down through a pant leg. The weight would be carried completely by the stealth pipe, even your arm. This idea is so radical that it triggers AI guard rails, so I can't show it (and I'm too lazy to draw)
>>3012818shove the sign up your ass. no one wants to see it.
how to turn picrel into a neat keyboard wrist rest?i only have a hacksaw, measuring tape, and rectangular sander. but no file set, router, table saw or anything like that. so far, i took measurements and made cuts for the width of my keyboard. and im half way through cutting along the length. using the hacksaw to make long cuts is pain because the fine teeth take forever. the bigger challenges with my limited setup are:1- rounding the front edges. i thought maybe use a quarter to make marks, hacksaw the edges off , and then sand it even so it's rounded.2- making all edges smoother. idk if my sander will be enough for the that3- making an incline cut, so the front is half an inch shorter than the back side touching the keyboard. 4- covering my mistakes by making all sides completely flat.
semi circle rasp came through in the clutch. will continue rounding the edges and sanding tomorrow. 6 hours of breathing wood is enough for one day.
here to illustrate the concept (that i copied)
after rounding and sanding edges.
first coat.
>>3013220Verrri nice. A bit worried about the weight. Might easily be the thing that get kicked around. Aliexpress sale coming up. Consider getting those mini magnets. Just drill hole, pop em in and apply a bit of silicone sealent or glue and you got a magnetic base.
