I want to make a solar charger for my cell-phone or other devices that can be charged on a usb circuit. I also want to put batteries in this kit so it can hold the charge and be used for later. So my questions are as follows. >How big will the solar cell have to be to charge two 18650 Li-ion batteries? >Will these batteries explode on me for some unholy reason? >Will this project even work? This is my first real DIY project and I know very little about electricity, so I'm... Comment too long. Click here to view the full text.
>>904725 >charge two 18650 Li-ion batteries how fast do you want to charge them? where do you live? solar charging is highly innefective.. to charge those batteries in a reasonable time would take a solar panel the size of a small car.
I have a solar charger that has one 3.x V 2000-3000 mah battery in it and it takes about 24 hours of direct sunlight to charge it, panel is abou the size of a credit card. Ive stuck it in the window for a few days and the battery bar never went up.... Comment too long. Click here to view the full text.
Need some advice /diy/, and my apologies if this is a stupid question.
So I'm building a stand for our new front end loading washing machine. I have the frame built from 2x4s, but now I need to cut the plywood for the sides and top. Problem is, I don't have a table saw. I do have a circular saw, a jig saw, and a hand saw.
I need some advice on how best to go about cutting the 4' x 8' plywood into smaller pieces (10" x 28" and 28"x28").
Water hammer arrester. They should be full of air so that when a hammer of water comes in it can compress the air like a spring and normalize pressure gradually instead of making the pipes knock like crazy.
Something about your house probably needs them if it has them.
I pulled out my old PS2 and some of the buttons on the controller weren't working, so I decided to open the thing. I managed to get every screw out except one (circled). I tried firmly pressing down and twisting, then the rubber band trick, and by that point I had managed to completely fuck it. Now there's a hollow pit where the + shape used to be, and I can't remove it. How screwed am I? I have a Dremel, but the screw is recessed and I'm concerned about potentially damaging the internals of the controller. None of the screw extractor bits I've seen... Comment too long. Click here to view the full text.
>>904566 carefully drill it out... preferably with a left hand bit if you have one... then fill the pit with some super glue and get a new screw... match the width of the drill bit to that of the existing screws you pulled out.... go slow... use a ring of tape placed on the bit so that you don't drill too far past the depth of the screw (use the ones you pulled out as a reference for how deep that one is)..
again, go slow... patience is key, if you slip the bit and drill the wrong spot it'll make much more... Comment too long. Click here to view the full text.
Hello friends, I have a pretty weird question about something i want to try. I want to paint a knife like the Doppler knives from CS. There's some attempts to do it on youtube but they always use nail polish and the knives end up lumpy and gross. I'm going to be using Testors enamel paints and actual paint brushes to try and keep it as clean as possible. My question is what order should i pain the knife in? the knife is matte black so im thinking silver base coat, blue coat, then gloss black coat on top of that. should i do a black coat over the silver then a blue... Comment too long. Click here to view the full text.
so I'm trying to get my FPGA to display with a monitor via a VGA connection I've read the timing charts on some guides online but I don't understand what the squiggly part is suppose to represent, any idea?
Is there a fish finder that could alert divers to the possible presence of a shark? There has to be something out there that's affordable and would tell divers if there's a large fish around.
Also, if your making a shark suit, what size rings and what kind of metal would work? Larger rings would be easier and quicker to work with.. would copper/bronze/tin work alright? What other options are there besides steel?
And how would one temper the maille? It would basically be made from thick wire... would tempering serve any benefit?
>>902429 If you want a shark suit, you should buy it. Firstly because time is money. How long is it going to take you to weld each of those little rings together? I realize this is /diy/, but in this case it's much better idea to pay to have someone else to do it. Secondly because, do you really want to trust loss of life and/or limb to something homemade?
Just so you know, from personal experience(anecdotal, but whatever), I had a small pit bull that could chew threw aluminum cans(and part of a storm door once) and copper pipe like it was nothing. I would diy something like this for the same reason I wouldn't diy a respirator or fall harness or anything of that nature;it may work very well, but if it doesn't you may find out the hard way.
>>900119 you need an initial force, usually compressed air. if you load the slug in and apply current you will weld the slug to the rails apparently. your household power supply will be shit for anything fun. look at diy wind turbines for a generator then connect it to a car engine. capacitor banks for projects like this will fuck you up. you seriously need to understand the proper procedures and mechanisms for operating, bleeding and grounding capacitor banks before you start building one. for hv projects you need... Comment too long. Click here to view the full text.
>>904855 Get a bunch of 2x6s and use a rafter square to make an appropriately sized rectangle, double up 2x4s at each inside corner for legs, make a ledge around the bottom with furring strip then use 1x4s for the slats.
So I was looking around online at prefab sheds and got sidetracked and found some prefab dome house kits for sale. This one in particular caught my eye: http://econodome.com/
Their kit seems to be really inexpensive for what you're getting and I was wondering if it seems feasible to build one of these at lower cost than a modular or custom built home and by someone who is not a professional.
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