im a newfag when it comes to electronics, and im a bit scared of li-ion cells, so i thoughtvid come and see if i was doing this right. ive had an old laptop battery lying around and one of those cheap usb battery banks, so i decided to expand it a little. i plan on wiring up all of the batteries in paralell and using them as one cell with the charging circuit. am i going to blow anything up?
/blacksmithing general/ - cant get this damn coal to light edition
Got inspired by the old thread, finally got my setup and spent a wonderful 2 hours learning how hard coal is to light. then right as it started burning good I turned on my hair dryer and burned it out in 3 minuets.
anyways, lets have another thread so newbies like me can learn the basics.
Start with a real fire in your coal pit. IE, sticks and shit. Kindling level, 1/4 inch around (or 1cm for the luckies that aren't stuck with a centuries old defective system of measurement). Put a few coal pieces on top of it. Let it burn down, slowly scooping more coal into the fire from the edges of your pit. Coal will smother itself if you try to light it too fast, since the tar ooze will make it form into huge masses with no airflow. When you add new coal, add it to the edge of your fire to let it start burning down, and move it to the center only when the tar is burned... Comment too long. Click here to view the full text.
>>1003876 Also, dont use a hairdryer. The air probably blows too fast and blows too much of the heat away, and it also makes your fire oxygen-rich so you metal corrodes faster in the fire. You want a large vollume of air moving at a slow speed.
If you can make your own charcoal and build a small oven out of fire bricks that works really well. You have great control over the heat. I've tried all kinds of fuels and i greatly prefer it, especially for smaller pieces and knives.
>>1003900 Yeah, this is the second hair dryer that I burnt out trying this. Gonna call it quits until I can save up for a real blower to put in, because my /diy/ attempts at making one have all been less than successful and the idea of coals flying at me at 230mph keeps me from sacrificing an old leaf blower. I'm also going to look into building a new forge, currently it ends up choking itself out with ash and the only way I can get air into it is through a 1/2" piece of pipe.
Figure if I rebuild it with a bigger... Comment too long. Click here to view the full text.
So I managed to get my hands on a greenhouse, 8x6 foot, but I need somewhere to put it. Ive got some paving slabs, so I dug out some turf and put in some boards to give me a border. I've marked out my levels and tried to get the ground as even as possible using a fork and a rake. I've got some sharp sand and concrete and now I need asvice on what to do next.
Can I get it even enough with basic tools? How do I mix the sharp sand and concrete? Can it be done by hand? Is it a one man job?
I just got this old compressor from my grandfather, his neighbor just passed away and his family gave all of his tools to his friends.
Sanborn model # 34B50
Either way, I looked up the model and every picture I see of this compressor has a single-head pump, which leads me to believe someone along the way put this dual-head pump on it.
It only reaches 60 psi, I think there's a leak somewhere, there's a component on top of the pump and I'm not sure what to call it, does anyone know the name of this piece? There... Comment too long. Click here to view the full text.
Backyard was overgrown so I went out to mow, ended up hitting the TV cable. It was wrapped around the blades something awful but nothing broken, just exposed copper now. I continued mowing but it had a different sound. Suddenly, there was an unearthly screenching sound and I turned it off. Now the cord will barely pull and, of course, I'm hesitant to try starting it again.
NEED ADVICE ... so, belkin has a product that you connect your shit that usually stays on (speakers, modem, home stereo etc) to it and when you leave or want to you flip the switch and they are off. Good idea for conserving power in your house. My problem is that this unit works in 110v and my shitty country has current in 220v... any ideas?
- is maybe more what hes looking for - eg, switch off the TV? rest standby devices switch off automatically, also, usually one socket for permanent power. That (link) is Belkin (as suggested), but, theres millions of them search 'standby power saver extension strip' or something.
Bleach, bleach, and maybe some bleach. Get a empty spray bottle if you can and mix up a good dilution to fill it with. Spray all of that shit down and let it sit for 15mins, then wipe down. If the smell bugs you get a bottle of whatever generic cleaner you can find for the cheapest (that the smell of doesn't bug you) and use that afterwards.
>>1019269 >Just wipe it down with a wet rag? use a mix that is 95% water and the rest bleach.
Not wanting bug droppings everywhere is normal, but bacteria doesn't really do much of anything unless it is placed into liquid water. So, ya know,,,, kitchen utensils sitting in a dry drawer aren't going to 'grow' anything.
I'm building a motion captive system for vr and need ideas for sensors and ways to rotate while still being held in place. So I have seen all the other motion tracking system and am not willing to pay $500+.
Hey there /DIY/. I'm trying to add an aux video cable to my 09 acura TSX, although I don't think the details are too important in this case. The display is obviously component or composite, you can tell just by looking at it. I want to go in there and add an aux video cable connector, but I'm not quite sure if it's the best idea- I've found some very dated pinouts for older years, but I'm not sure if they're current. Does the display likely use some sort of proprietary signal, or would it use something standard like component or composite?... Comment too long. Click here to view the full text.
I've been working since Friday (with a significant break yesterday) and I'm nearing the point where I'm ready to paint. I've used 70lbs of joint compound already and I'm feeling like this is too much as I haven't even done the ceiling yet. How badly did I screw up?
On a side topic, at what point do you say the job is too big for you and hire someone. I'm starting to doubt my ability here.
Haha. (1) Why didn't you just lay one SINGLE sheet of drywall instead of throwing shit at the wall, ya idiot? On a side note, i've been guilty of that offense and have learned (1) the hard way as well.
I am working on a idea for some remote controlled equipment via phone
Initially I thought about data over sms but then found DTMF solutions as pictured
I am looking to do some kind of remote home automation like adjusting thermostat or opening garage door via text or call
I also located a carrier called Truphone that provides global phone coverage through their own network and allows free incoming calls inside the US and UK I verified with their rep at the call center that you pay upfront for the sim card ($20) and some prepaid minutes (the minimum) and... Comment too long. Click here to view the full text.
Text messages are cheaper than voice calls, and you'd need to be making voice calls to transmit DTMF.
Cell phones don't use DTMF. If you hit a button while talking the other end doesn't hear DTMF like with land line phones. You'll have to create an app or external device that plays DTMF into the cell phone voice connection.
Voice calls through a cell network are digitized and compressed. Your DTMF could look like background noise and get filtered out.
>>1018691 Does it have to have a phone on the other end? You could get a raspberry pi and control stuff over SSH from yhe internet. Instead of using a cellphone, you might use a GSM module, which is a cellphone in a handy hackable format.
It might be best to use a GSM module and send it SMS messages to control what you want to do. For best results use encrypted text messages
I have a couple of 6sn7 tubes lying around. What can I build? I originally had plans for a headphone amp but I would have ended up dropping way too much money for something I don't need. I'd like to build up a nice portfolio for applying for my EE masters.
>>1018577 your 6sn7 is a medium gain dual triode which would be fine for a line level first stage of an audio amp. You would still need some beam power tubes for the output stage. as for the transformers edcor sells very reasonably priced output transformers. https://www.edcorusa.com/xse10-50-8k of course you have to match the output tubes with the impedance of the transformer.
You will need a power transformer which edcor sells those as well. You would need a plate voltage of less than 450v using a modern rectifier... Comment too long. Click here to view the full text.
Sup pol got a 1970 Apache camper to sleep in while I gut and rebuild this house.
I'm about to refit it with hard panels (instead of canvas) from a 1972 model.
Currently shown in compressed mode.
Anyway, it's not as fallout as a canned ham style camper trailer or mini airstream looking thing, but I want to decorate it post apocalyptic style. Any suggestions? I can't find jack shit for inspiration on google images because trailer also means "video preview" and the results are useless reviews of fo4
>>1018451 I tried magnets on the screen, but it didnt do anything useful. To give more detail, the thick lines on the side are waving around really fast. when i plug something into it, the input video takes the shape of the odd shape in the middle of the screen
I have breathing issue in bedroom with door shut. have feelings of suffocation and lightedness constantly then I walk out of room for 5mins and start to feel normal.
I asked this here months ago and anons screamed'carbon monoxide detector' I got that and it didn't pick up anything. I also throughly cleaned bedroom removed tons of old clothes. and still experience. my bedroom closet has water pipes in there but I sealed it u. not sure if it's relevant
Is someone going to be living or dying based on this? If that's the case, seriously, just buy whatever is needed.
If you're just fucking around, the 12V battery you posted is a sealed lead-acid battery, commonly referred to as an AGM. They are heavy but reliable and hold a good amount of power for their volume. If you know the ampere-hour requirements, you can pretty easily match up a 12V AGM battery. They make them in all sorts of sizes/capicities.
NiMH would not be that great, they are actually a pretty crappy battery. Low charge holding and they deplete... Comment too long. Click here to view the full text.
Hey /diy/, I'm trying to figure out if it's a bad idea for me to build/use a homemade rotary tool like in pic related, safety wise. I'm planning on using it to cut mdf boards, and pvc piping, nothing particularly strong. Assuming that I use gloves, safety glasses, do you think this is a bad idea, or am I overthinking this?
>>1017855 That on e pictured is very low power and low RPM. It would be quite safe to build and use. Operation would be slow. If you decide to use an AC/DC wall unit, make sure it has at least a 2 amp rating. When a motor stalls it eats up a massive amount of power (sometimes peaking at 90+amps for a normal battery-powered drill for instance). The motor used in that one most likely won't exceed 2-3 amps when stalled.
However, a high speed, high power unit using a blender motor requires more experience and skill to... Comment too long. Click here to view the full text.
hey /diy/, turns out my housemates are nosey fucks and like to go through my stuff while i'm not home. my door can't even be locked from outside. thing is, my door handle seems to be fatter than any handle i've seen that has a proper lock, though admittedly i haven't exhausted my search quite yet. the question is, is it possible to change the handle to one with a proper lock without having to saw the wood or leave open gaps at the sides? how likely is it to find one with the same size?
from my experience air purifiers don't really get rid of the smell, although give it a shot, they can be expensive but even if it doesn't work you will just end up with cleaner air and feels good to breath
The laptops you "build", with the exception of the Novena, are just laptops designed like any other that inexplicably come in kit form. You get the exact same laptop as if you'd used any normal manufacturer's options list, except you do a load more work, there's no warranty, and you don't save any money*.
* Unless you pirate Windows instead of paying for it.
Sup /diy, first of all, sorry for my english (not my native). I know 4chan full of creative and dumba$$ people and I think its gonna be fun to share with you what I'm doing right now. I want to share my loft bed processes. I have this idea since last year but I haven't enough time to design/construct it and make it happen. Ive been doing this with my worker (2 guys + 1 including me) since monday. I've a ton of photos to share with you, the processes and the crazy things my workers did. Let's start
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