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every time I wake up in bedroom nose is extremely stuffed. so much my head feels like it's detached from my body.
also can't even breathe in the room. like feels like there's pressure in my lungs. the room is like double the size of your closet and has window AC installed
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was wondering what you guys thought the problem wwas
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Do you get enough air in? Keep a door or window open. Do you have the problem year round? Also when sleeping elsewhere? What have you tried?
Anyone knows where to buy good quality high power leds? I need to replace the bulb on a few diving lights, pic related. The old bulb was running at maybe 14,4V? The batteries are dead but literature suggest so.
So I'd need a LED that can run at that voltage, with a reflector with approximately 62mm diameter. The original bulb was 50W so that is the max power I'd like to see on it.
Originally the lamp had three power levels
XV (~14?)
9,5V
4,5V
And the lamp has a internal cirquit that lowers the voltage as the battery discharges. I a perfect world I'd have a LED module that can acclimate to those voltages and lower its brightness but I realise it probably isn't realistic.
Im not going to replace the electronics on it. It's a diving torch so it has a nice integrated charging cirquit and can be charged without opening the torch.
Anyone into leds here?
Also, what is a reputable seller for batteries. It uses nimh 17650 cells so I'm looking for those (preferably in joirop). I usually buy from nkon.nl but they don't stock the 17650.
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Tl
Dr
50W approx 14V led chip with driver and reflector/lens.
How do you separate the quality from the garbage. From where can one aquire quality shit instead some kind of 1000lumen shit?
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Are you quite sure it used 3 voltage levels?
It's far more likely it's PWM'ing the bulb, which would make life easier for the LED conversion.
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>>1233002
Yeah, it's probably pwm. But my multimeter sees it as a constant voltage. I was while measuring thinking about this and wondering how I'd find about if it's pwm or something else but I don't know how :/
Any hobby/professional welders on here?
Im really interested in welding and was thinking of picking up a cheap arc welder from harbor freight.
This is the one I was considering
https://www.harborfreight.com/80-Amp-Inverter-Stick-Welder-61749.html
Anyone have any tips on welding for a newbie?
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I've got two of those and I like them, I can bring it up the ladder with me and if I drop it I'm not out much, however if this is going to be your primary welder look up and of the identical 200 amp dual voltage inverters on Amazon or eBay for around a hundred bucks. They work great and have some head room, plus you won't be out much if you don't like welding and you can easily sell the, for what you are into them or more on cl. Watch chucke2009 and welding tips and tricks, a lot of people have learned from those two
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>>1231633
Watch and read everything you can find and practice practice practice. Most people don't have the patience to actually get decent
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>>1231649
>chucke2009
You mean that sellout that only does review videos to get free shit, then tries to sell the used pre-production machines for a few dollars less than market value of a new production machine and gets butthurt when people call him out on it?
Yeah, I *guess* he's okay.
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I need advice on how to make these things. They're circular plates of knight armor about 11 inches in diameter called besagews and it's difficult to find replicas being made, especially for something so simple. But I've never worked with metal before and want to make my own. I've already tried making some with some 16 gauge sheet metal and the results are crap. I've already been able to make the basic shape but hammering out those straight flower petal-like designs has me completely lost. Any advice on how to pull this off properly?
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Here's a replica. The only site I've found selling these has them out of stock completely. For something so small they're really in demand.
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Here's what it looks like with the full armor, they were used both for decorative purposes and as a protection for the armpit against sword or dagger strikes.
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>>1231042
I'm a knife maker. Been making them for 21 years.
One of my fantasies has been to make my own set of full plate proper steel armor. Just because.
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I have this cheap 6axis robot arm that uses servos. Is it possible to replace servo motors with brushless motors for greater accuracy?
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dunno. why don't you program it to jerk you off?
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Anyone?
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>>1230612
if you have to ask then no, YOU can't.
Anonymous
/ohm/ - electronics thread, wikity wikity wack edition 2017-08-20 03:32:51 Post No.1230603
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/ohm/ - electronics thread, wikity wikity wack edition 2017-08-20 03:32:51 Post No.1230603
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/ohm/ - electronics thread, wikity wikity wack edition
Anonymous
2017-08-20 03:32:51
Post No. 1230603
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bump limit reached on old thread >>1226748
pastebin.com/9UgLjyND (stale)
https://www.wiki.printf.pl/index.php?title=Pasta (fresh)
>I'm new to electronics, where to get started?
There are several good books and YouTube channels that are commonly recommended for beginners and those wanting to learn more, many with advanced techniques. The best way to get involved in electronics is just to make stuff. Don't be afraid to get your hands dirty.
>What books are there?
Beginner:
Getting Started in Electronics Forrest Mims III
Make: Electronics Charles Platt
How to Diagnose Fix Everything Electronic Michael Jay Greier
Intermediate:
All New Electronics Self-Teaching Guide: Kybett, Boysen
Practical Electronics for Inventors: Paul Scherz and Simon Monk
Advanced:
The Art of Electronics by Paul Horowitz and Winfield Hill
>What YouTube channels are there?
https://www.youtube.com/user/mjlorton
https://www.youtube.com/user/paceworldwide
https://www.youtube.com/user/eevblog
https://www.youtube.com/user/EcProjects
https://www.youtube.com/user/greatscottlab
https://www.youtube.com/user/AfroTechMods
https://www.youtube.com/user/Photonvids
https://www.youtube.com/user/sdgelectronics
https://www.youtube.com/user/TheSignalPathBlog
>What websites feature electronics projects or ideas?
http://adafruit.com
http://instructables.com/tag/type-id/category-technology/
http://makezine.com/category/electronics/
>Where do I get components and lab equipment from?
digikey.com
jameco.com
sparkfun.com
ramseyelectronics.com
allelectronics.com
futurlec.com
ladyada.net/library/procure/hobbyist.html
mouser.com
alliedelec.com
newark.com
ebay.com
aliexpress.com
>What circuit sim software do you use?
This mostly comes down to personal preference. These are the most common ones though:
NI Multisim
LTSpice
CircuitLab
iCircuit for Macs
CircuitJS (quick, dirty, interactive)
>What software should I use to layout boards?
Circuit Wizard
ExpressPCB
EAGLE
KiCad
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>>1230603
Damnit, the only reason that image was posted in the last thread was because it was someone's OP earlier in the year/last year.
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>>1230606
I do seem to have a talent for pissing everyone off with the photos I post. Maybe my username on the new wiki should be badpixanon.
Fine, then. You don't like the holding the wrong end of the soldering iron series? Post something better and I'll delet.
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I am looking for some advice. I have done all the research I can and bought several sets of plans but they are all extremely dated i.e. calling for parts of a Model T car.
I am trying to build a sideshow Electric Chair. These are chairs or stools you can sit or stand on, turn on, and then when turned on light lightbulbs in your hands and lightly shock people. All I can gather is that I need a power source of some sort and a copper plate to make contact with. If anyone has any ideas it would be greatly appreciated. I can provide links to videos if anyone would like to see one.
Anonymous
Sandblasting iron rails 2017-08-18 02:52:19 Post No.1229744
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These railings have so much built up paint and rust, I tried using a wire brush and chemical stripepr on one side, but its taking too long with too little results. I'm considering removing the rails and sending them out to get blasted and powdercoated. Do sandblasting companies also saw off the railing too, or will I have to find a different company to remove the railings? Am I going to have to pay a ton for both rails to be done (i'm in chicago, but close to the border of the city if that matters)
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>>1229744
I know I've posted this project here before but this time its for a different reason.
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>>1229755
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You may be able to find a place that will do soda blasting or dry ice blasting on site which would be cheaper than taking them for sandblasting. Call a few sandblast companies and see what they say. Putting them back on is the next fun part and it might be easier to get new rails when you factor in the cost of on site welding to put the old ones back up.
Anonymous
Cheapest possible drinking water purification 2017-08-18 01:35:43 Post No.1229726
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Cheapest possible drinking water purification
Anonymous
2017-08-18 01:35:43
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Digging a family a well soon. They just had a baby and their system is very time consuming and gross. Dug wells don't have much bad shit like arsenic as opposed to drilled ones but the baby is going to need the best. A big still? what do?
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>>1229726
nitrates and microbes are probably a bigger problem than arsenic (depends on geology and source of pollution)
have the water tested first before you try to solve the problems
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>>1229748
This. Know your obstacles, don't just throw solutions at it hoping one will stick.
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>>1229726
Cheap and effective (but doesn't remove toxic minerals like arsenic/lead/etc.):
https://en.wikipedia.org/wiki/Slow_sand_filter
I have no idea how to build one.
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I have a 12v DC power source and need to adjust the voltage on the fly from 1v to 12v. How do I build a device to do this using only parts salvaged from standard consumer electronics (tvs, radios, computers, etc)?
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>>1229286
rheostat
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>>1229288
Could I use a standard AC light dimmer switch or would this not work?
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>>1229291
No...
Anonymous
/3dpg/ - 3D Printing General 2017-08-13 04:40:32 Post No.1226887
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/3dpg/ - 3D Printing General
Anonymous
2017-08-13 04:40:32
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Old thread >>1203902
Still new pasta, feel free to contribute.
>general info
https://www.3dhubs.com/what-is-3d-printing
https://www.3dhubs.com/knowledge-base
Additive Manufacturing Technologies:3D Printing, Rapid Prototyping, and Direct Digital Manufacturing, Gibson Rosen Stucker
>open source community
http://reprap.org/wiki/RepRap_Machines
http://forums.reprap.org/
#RepRap @freenode
>buyfag buyers guide
https://www.3dhubs.com/best-3d-printer-guide
Any cheap chinkshit kit
>basic 3d printing FAQs
https://opendesignengine.net/projects/vg3dp/wiki (lots of useful stuff)
http://www.reddit.com/r/3Dprinting/wiki/index
>why do my prints look like shit, visual troubleshooting
http://support.3dverkstan.se/article/23-a-visual-ultimaker-troubleshooting-guide
http://reprap.org/wiki/Print_Troubleshooting_Pictorial_Guide
https://www.simplify3d.com/support/print-quality-troubleshooting/
>how to calibrate
http://support.3dverkstan.se/article/30-getting-better-prints
https://www.youtube.com/user/ThomasSanladerer
http://reprap.org/wiki/Triffid_Hunter's_Calibration_Guide
http://prusaprinters.org/calculator/
youtu.be/w_Wb0i0-Qvo
>where do I get files to print?
https://www.yeggi.com/
https://www.youmagine.com/
http://www.thingiverse.com/
https://www.myminifactory.com/
>what programs do you make your own files with
http://support.3dverkstan.se/article/38-designing-for-3d-printing
http://www.freecadweb.org/
https://www.blender.org/
http://www.openscad.org/
https://www.onshape.com/
http://www.autodesk.com/products/fusion-360/overview
>what kind of filament do I want
Begin with a roll of known brand PLA before moving to more demanding materials.
http://support.3dverkstan.se/article/28-material-guide
http://www.matterhackers.com/3d-printer-filament-compare
>Hotends
e3d and its clones
>SLA&DLP
http://www.buildyourownsla.com/
http://www.nanodlp.com/
>SLS
http://sintratec.com/ A SLS kit.
Need help with prints? Post:
>filament type, bed & extruder temp, print & fan speed, etc
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>>1226823
I started with fusion 360 yesterday. I had tried it before and gave up, being very frustrated with the performance and the work flow I had in general (dragging sliders had massive lag to it, probably because constraint evaluation was slow).
Now that I tried it again and went through a new set of tutorials it feels great. I can definitively see why everything is as it is and I'm not able to do everything I want yet but for models where I design them myself I can see it working out great.
I've read a little about blender type 3d modellers and cad style. People dislike that blender is a destructive modeller. My understanding of that is that you can't change things you started out with without a lot of work. In fusion 360 everything is linked up. So say you had a brick with a hole in it and you cut away half the brick. To change that in blender you might as well start over. In fusion 360 you just go change the thing that defines your hole and change it.
I think this is much more fit for engineering applications. But 3d artists use things like Maya and blender. So I'm guessing there's upsides to those. I don't see them right now. Depends on what you're gonna do, practical 3D structures or pretty figurines.
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Sup guys, I have a Wanhao i3 V2.1
It usually prints well after I added a radial blower instead of the stock fan.
I added a second one and decided to print a calibration cube, pic related.
What could be causing this?
I will post the other sides as well
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>>1226974
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I need you to give me your best construction pictures,
pic unrelated, i want the best shit
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btw it's for a social media site
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>>1226064
and /hr/ was for interesting outstanding pictures
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im /hr/ gay...not !
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>cockroach is still alive after 24 hours in the diatomaceous earth chamber
did I get memed?
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>>1224662
It's not a poison, it operates off a mechanical aspect.
Imagine if you put a bunch of sand and shit in some bearings, they wont last very long will they?
I mean, they will still work for a little bit, but the lifespan will be dramatically reduced.
Just like the life of that roach.
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>>1224662
it is supposed to be used dry, not wet
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I fucked myself over. some redneck dude wanted his kenwood tuner to light up blue because he's one of those weird "pimp my radio" kind of guys. So I shove a voltage regulator and a few LEDs in this bastard and now it won't fucking receive FM and only barely receives AM. what the fuck happened.
I ave a night to figure this out. I used this guy's LED mod and I'm scared
http://audiokarma.org/forums/index.php?threads/kenwood-kt-7500-restomod-blue-green-leds-power-supply-upgrade-recap.457960/
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>>1223555
Start by completely disconnecting what you added. This will at least tell you whether you fucked the radio somehow or it's just something with your circuit interfering with normal operation.
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did you test it before working on it? because that sounds a lot like you don't have an antenna plugged into it.
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>>1223565
built in antenna bro
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>Live in apartment block infested with these fuckers
>Go full 14/88 on any nests I find - use surface spray, gel, baits and seal my food.
>Keep population in my apartment under control.
>Pest control comes out to treat apartment block at the request of another tenant.
>A month later I'm swimming in roaches.
>Fuck.jpg
How can I tell if the Pest Control did their job? I'm suspect that they haven't done anything so they can keep coming back to earn more money.
Also what's the best way to detect a messy tenant?, there is way to many of these motherfuckers flooding in to be just a simple apartment block infestation.
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>>1222523
Insecticides alone don't work that well.
Anyone who leaves food accessible is contributing to the problem. Also leaky faucets and dampness make the problem a lot worse.
Always wash your dishes right away, keep ALL food in airtight containers, and wipe kitchen counters and dining table and sweep the kitchen floor every night. Don't eat outside the kitchen and dining room.
If you're doing all that then poisons can be used effectively.
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>>1222523
They come from sewers or any drainage channels which are overlooked. Chances are your apartment sewers are filling up with those. They breed and infest upper layers. Put bait near entrances, enclosed water meters near your apartment (any place that is damp and dark, where roaches like to hang around) and any storm drainage channels. Have pest control to treat the apartment, with neighbors.
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Building maintenance guy here, everything said so far is good advice. Another good measure is to seal around any holes where pipes come from the walls, under your bathroom and kitchen sinks. Also around radiator pipes coming up from the floorboards (if you have boiler heat), gaps between pieces of moulding all throughout the apartment, etc. Close up as many possible entry points as you can, basically
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The concrete slab on my front porch is cracked and is leaking water into my basement. The foundation of the porch is actually a small room in my basement, and the slab is that room's ceiling. If I were to remove the slab and install a wood deck instead, what is the proper way to prevent water from infiltrating? I was thinking galvanized roof deck, but what else would work?
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If you're redoing the slab that in itself should stop it....but...you need to prevent water from running along the joints between ...assuming the picture pertains to this issue....slab and brick...you can just caulk the joints and most importantly...put a vapor barrier down before you place your concrete....roll or sheet plastic is fine...no large trash bags unless you tape up the joints and any punctures.
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>>1233918
The ellipses make me think you're Stevie from Malcolm in the Middle
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>>1233918
just did this two weekends ago in sf.
we dug like...3 feet down to the footer, put on this rubber cement stuff the whole length of the side of the house, put the black liner stuff and these rocks. caulked all the stress crack on the side of the house.
we did this becasuse the last guy who worked on installing the windows properly fucked it up and did not seal it properly. this was a inlaw/garage w bath. totally fucked up, mold and shit all thought the walls has to be totally re worked