>>908212 Gee, I wonder how they were able to solder it to the thing in the first place then. Cause you're the expert about what will and wont damage it. Maybe the heated the silver solder with the power of bushido.
I tried /o/ but they keep telling me (an anon with bugger all wrench time and no real space to work) to just do an engine swap. Well, one guy does, no one else is responding. to keep this TL;DR check out the details on /o/, will repost here if and when that thread dies.
Long story short, I think it's a blown headgasket but before I commit to buying tools and parts I would like a confirm, or at least some suggestions of other things to check before I go pulling the head off. There is no... Comment too long. Click here to view the full text.
Considering the leak appears to be at the top of the engine, would a compression test confirm that? Engine runs fine otherwise, delivers power as it should across all RPM ranges, I imagine a crack in the head/block would have an impact on that.
no way you're gonna find this. it'll have to be shift registers, or a bunch of different mega boards talking to each other. http://www.thekanes.org/2010/06/09/expanding-the-arduino-cheap-ways-to-add-output-pins-and-power/
or, if you want to enter the wonderful world of FPGA, you can get an Actel APA750 for about $1,000 dollars.
An experiment I want to do requires me light up a box with rainbow light which has frequencies of 380nm(Upper violet) or less to over 9000nm(Room temperature infrared). It'd be most useful if it was radial, lighting up the soil with a junction between all colours at the centre and around that arcs of different colours. Preferrably, the light energy will be independent of wavelength, i.e. for every watt of violet there's a watt of red.
It's a biology experiment, I want to put a simple plant (moss or algae) in a mutagen and see if it will create a form... Comment too long. Click here to view the full text.
>>907558 that's gonna be tough... from 380 to 980 or so you could do it piecewise with LEDs and phosphors, but specific wavelength lightsources are going to add up. Above that, you may need to go incandescent and filters... and I have no idea what you will do for filtered output longer than 2000nm. You're already talking about crazy expensive optics.
Stuff like a prism is not going to be linear or usable outside of the spectrum right around visible...
You guys know how its bad for lithium batterys to stay at 100%.
Most people leave they're laptops plugged in or its a hassle to keep plugging it in and out, also just taking the battery out can be bad in case of a power outtage you loose the date.
Why isn't there a thing to detect current draw and cut power when it reaches a certain draw ? (li ion current draw tapers off near full charge, so it's likely to be able to detect battery %/capacity this way and cut it at 80% or so lets say)
Does noone need this or don't they even know they need it ?
>>907475 It's fine for lithium batteries to stay at 100%. The only thing that effects lithium is the actual number of charge cycles. Good batteries track this and will report this. Your battery capacity almost certainty isn't going down outside of the expected further. I just replaced my Lenovo at 1800 cycles. It had gone from 7 hours to 7 minutes.
Has anyone here ever looked into building a power plant for home use? I am looking into building either a bio diesel generator, steam generator or something in that order. Has anyone looked into or built anything like this?
Started reading up on electronics about a month ago, reading a couple books that I got off tpb. I'm currently working on a battery tester, using a ИB-15 lamp that I found with some scrap electronics (pic related). However, I can't make heads nor tails of how to actually get the bulb to start glowing. The best info that I've come across is this page: http://www.radiomuseum.org/tubes/tube_iv-15.html, but like I said, I can't figure out how to translate this into an actual circuit. Any explanations would be awesome. I've already tried googling the terms... Comment too long. Click here to view the full text.
>>906869 Does this tube not require a ground then? I understand that ИB-15 is used in logic circuits, but I've got a generic LED stuck in my head when I try to light it up, with a positive lead and a lead going to ground/negative
Hello all and happy holidays. I just moved in to a new house and my room has this huge hole leading to the living room and kitchen. The noise can be unbearable at times and the lack of privacy is frustrating. so I've been thinking of ways to cover up said hole that would block out some of the sound. I can't do any construction because we are only renting the house but i was thinking of filling it in with some sort of foam or Styrofoam blocks, then painting it or covering it with a curtain. any thoughts or advice is greatly appreciated.
>>906753 If you want to go off the foam idea you should try measuring out large foam boarding and make what is basically a giant puzzle piece for your wall. Slide it into the wall and hang a blanket with a cool design on top of it.
>>906753 use acoustic foam. Try tacking up a thick curtain on each side first, it may solve a lot of the problem. (It won't drop it a ton, but may be 10db is all you need.) If that doesn't work, then yes, use acoustic foam. It won't help a ton because drywall doesn't block sound very well either, as many apartment owners have found.
/diy/, make me aware of some basic thermography and how could I improve the situation.
The pic is made from outside. The windows are supposed to be new, triple glass. Northern Europe, so heat insulation is important.
You can see that there are three places that the heat is leaking from. Is this normal that: 1) the place you this gypsum stuff on the wall is where the heat is leaking? 2) the place where the window connects to the frane is where the heat is also leaking? 3) the place where the glass pane is connected to the frame is where the heat is leaking... Comment too long. Click here to view the full text.
>>906623 it look slike where the glass meets the frame and the gap where the window closes.
the dar filler in the wall might be thinner than the rest of the wall OR the heat from the window gap could just be warming it up. compare it with the sides if they are filled in a similar fashion.
just because its red doesn't mean its actually hot the seals where the window closes will always be warmer than the rest because there is a gap look at the scale, there is what 9C difference? at -4 you are doing pretty... Comment too long. Click here to view the full text.
I've got an OLD oudoor central ac unit that is leaking freon around the charging valves. Is it possible to replace the valves?
I have freon to charge the system, but do not have a way decompress the system and store existing freon in a bypass tank. That I can think of. I'd like to not waste everything in the system since the stuff is worth its weight in gold now.
>>905673 I mean, if you have to ask you clearly have no idea what your doing so don't do it. Heaving said that (and sounded like a total dyke) what do you actually want to do in the lab? Is it an analytical lab, a research and test stile. Owning lab equipment is legal as long as you don't use it for illegal activities.
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