Archived threads in /diy/ - Do It yourself - 127. page

>>1187078
I was about to post the same thing.

>>1187079
+1

change the values of the feedback resistors for the amplifier chip.

Measure peak output proportional to volume setting. put a stop on dial at desired peak output

File: 30W 30ohms.jpg (63KB, 640x560px) Image search: [Google]

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stick power resistors in series with the two speakers. if you use 8 ohms, you divide voltage by 2 and power by 4, 16 ohms divides voltage by 3 and power by 9, etc.

>>1185739
>we are shooting for a budget of around 150,000$

That means you should aim for $50,000

>>1185739
>advice
get divorced, now, while you still have fond memories of each other. 'musing' is fine and good actually, building a house ain't, its stressful as fuck. And wtf is that thing - are you a fucking hobbit, or do you (or the good wife) have spades for hands, hooves for feet per chance?

No? then, enjoy life, stay in a home you are comfortable with, or, buy another one you'll be even more comfortable with - and, if that's got a big garden? give the wife a shovel, tell her to wire in, make her dream greenhouse dreams come true. But dont put every cent you have into nonsense like your pic related when you also have to build it and live in it.
>inb4 shipping container, covered in grass?

It's a plastic tube that doesn't breathe at all? So you need to run a dehumidifier 24/7?

>>1185634
what was the drum used for?

Smoking causes lung cancer

>>1185644

fortunately the cow was already dead

>>1183762
>grinds the bolt off instead of trying to back it out first
>f-ing morons

and the fail continues...

>>1183762
>f-ing morons
> grind off the whole freaking head of the bolt

wait, who's the moron?

>>1183762
you're supposed to start it then put the wrench on

https://youtu.be/wYb_UjgJ5E0

Has your university hired a technician with all the composite know-how? I'd imagine it's hard for a bunch of kids to start a composite workshop from scratch.

Jesus fuck OP! Use a fucking search engine to find what you need. How stupid are you????

The school doesn't need a composite tech to teach how to do chopper gun or hand laid fiberglass, but students with IQs greater than that of a radish would help.

Boatbuilding forums exist. Go there.

>>1183364
http://www.cnbc.com/2017/05/18/italy-is-giving-away-over-100-castles-for-free--theres-only-one-catch.html

>>1183364
Italianfag here, mind you have to be a good marketer, the reason we're losing population in the mountains is not because of structural issues (and earthquakes are not helping, damn I'm scared sometimes) but because there's no economic life there, people started slowly migrating in the cities cause of scarcity leaving worse situations until smallest centres died.
Given that, if you want a slow life in the middle of nowhere, in absolutely beautiful places, and want to try to build a small hotel for next to free you're welcome

>>1183382
Tbh it's not an Italian exclusive problem, it's happening pretty much in the entire west. Younger generations, in general, don't wanna deal with the hassle of living middle nowhere, with no jobs, infrastructure or social life. People choose to live like rats in big cities instead.

>>1167466
Maybe you could try a soft metal seal? They use a copper ring that deforms when you clamp a hatch's harder metal shut on it for some purposes, but it typically requires replacing the copper after each run.

The pressure's going to be on the outside of the sub, so as long as the gasket is rigid enough not to squeeze everywhere, you'll be fine. If you have a pressure chamber of some sort you could run some scale tests. Better yet, if you could control the submarine remotely, even if it's by a cable out the top, your life wouldn't be in any danger, and the sub would probably be fine even in the event of a sudden leak. I say you should be trying to find some sort of marine-grade sealant, maybe even a thick, solid O-ring.

So is it electric or pedal powered? How do you control the buoyancy? And how do you seal the control surface shafts?

I did hear that the Irish used screen doors

>>1167484
Its electric, i have 2 115 ah marine batteries. I'm going to use a minn kota trolling motor as my screw. I'll also have a rudder and elevator. Both of which will be controlled by brushless motors mounted outside the hull. I have 4 10 gallon propane tanks mounted outside the hull to act as ballast tanks. A valve on the inside of the sub will allow water into them. Another propane tank will contain pressurized air to displace the water in the ballast tanks. A small compressor inside the sub will pump up the reserve air tank while on the surface.

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>>1186800
Get some pliers, place them on the slab and build a wooden floor on top of them.

>>1186866
Those are weird looking pliers. Where are the handles?

>>1186866
Piers ?

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>>1186593
It broke off at the black ring

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Handle which broke

>>1186593
Don't you have a water source that you can turn off in your house or somewhere in your building ?

I forgot to mention the transistors are going to be regular generic 2n2222's (or whatever the common part is)

>>1186333
R1=R2=R3=10kΩ, no need to adjust anything. R4 depends on supply voltage and LED voltage/current.

that sounds fairly consistent with what I'm finding in google. there's a lot of math involved and lengthy forum discussions that I think is overkill for what I'm doing -- I just need to turn on an LED from far away with a magnetic reed switch, nothing too precise here.

I only have 20k resistors as far as anything in that range, I'll just put them in pairs, in parallel for the test version of the circuit then.

thanks, I appreciate your help.

I'm building right now, so I'll post back with results.

anal piss

>>1185531
anal piss

I considered getting one for $5 the last time I was at Micro Center for a free 32 jigglybutt μSD, but then I saw I can get one elsewhere with onboard 802.11 for $10, so I didn't.

>>1185531
/g/ may have some eye dears for you, if you can tolerate the cringe there.

Hard enough that it's worth renting a chainsaw

as someone who tried that. just rent a chainsaw. not worth at all.

>how hard would be it be to do something men have done with far lesser tools for thousands of years

yeah, you're a faggot.

>>1187417
>should I just blame niggers
No, you should just blame your parents for raising a moron.

man you and your parents are on some next level denial about dementia

Yes, "urban" "thugs" are repeatedly breaking in to smack your dad for giggles.

There's lots of cheap stuff you can have your parents set up for surveillance, maybe just an app on an old phone.

>>1187208
Try it and find out

>>1187211
Kind of on a time limit and don't have access to more plexi to test it out on something else, would prefer not to permanently fuck it up to see if it would work out or not.

>>1187208
place another layer or plexiglass over the drawing - bam! it'll last forever