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I want to build a biodigester. I have read a bit on them and they seem really easy. I haven't been able to find a few answers though. How do I prevent the thing from blowing up? Is it better to bury the tank? Finally, what's the best type of tank to use? I'm concerned about the breakdown rate of the plastics. Thank you in advanced anyone willing to help me.
6 replies omitted. Click here to view.
>Do you know how to vent it without losing all of it?
You could use a pressure relief valve, they allow you to vent at whatever pressure is going to start being too much for the IBC, but here's the thing.... If you have headspace in the IBC that's full of gas, but it's not under pressure, how are you going to remove it in order to use it? You're going to want to pump it out/compress it into something you can store gas in, or you can add a flexible bladder like an innertube to collect gas and act as a pressure reservoir
>Do you know how to vent it without losing all of it?
if you dont know what it is dont try it
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Can you do this?
you wouldn't be able to store a lot of gas, plus you're going to have an air/gas mix in storage. easier to store in a hardwall vessel with a PRV (like a spunding valve)
You mean keep a pig?

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Killed 3 cockroaches this week and saw another one that managed to escape... I don't know if there's a nest in my walls or something or if they're just crawling through the opened windows (it's summer heat season so I leave everything open, and I sometimes see cockroaches outside near my home when I night walk in summer/live near a park).

My home is clean and I don't leave any food out, I only ever see them in July/August when the summer heat peaks, but every year I see a few of them, during the night.

What's the best way to get rid of them? Adhesive traps, poison gel, spray?
9 replies and 3 images omitted. Click here to view.
Live in NYC. I have combatted roaches multiple times, to the point of repairing plumbing in neighbors' apartments to keep them from breaking out in the whole building.
bro, it freezes there. you got it easy when it comes to removing roaches.
try living somewhere warm and humid all year round.
Depends on where you live and If you actually have an infestation. I lived in Albuquerque for a few years, roaches there lived in the water drainage in the streets. They’d come out at night. One place I lived had roaches all over the exterior at night, and sometimes I’d find a few inside. Other (newer) parts of town I’d rarely see any at all.
If they’re living in the street drains there isn’t really anything you can do about it.
OP, Florida anon here. Keep your house fucking spotless, the most frequent place I see them is in my garage during the warm months. Being spotless is part, but keeping moisture to a minimum is key. If you keep everything clean, dry, and all access points poisoned, you should be good to go.
>it freezes there
Not in steam heated apartments it doesn't.
In fact, because of all the damn steam drips from old regulators, winter can sometimes be worse.

Let's make one for DIY.
Here's what I made-https://pastebin.com/iT5tN9Ng

Take it further my men
20 replies and 2 images omitted. Click here to view.
>For /diy/ you don't have that luxury, a lot of tasks require spending money on tools and materials.
lol. More than that. You still also need the space to store the shit and then even more space to have a workspace. That already makes it impossible for anyone that doesn’t own a home and is too far from a makerspace or whatever
Even if you own a home I imagine it'd be difficult in a lot of suburban places. I have a walkout basement and a half acre yard and no HOA but taking away any of those would be a huge hinderance.
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Wire a house is medium?
Making a stuffed animal
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Yes. Just follow the colors and staple stuff down.

Put 30a 240c to a dryer, oven, water heater or hvac.

20a to a string of outlets. 15a to a single outlet or lights.

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How do I preserve my body in the trades? The work is hard, obviously, but is there anything I can do to prevent the work from destroying my body? Are tradies in such bad shape because they don't care for their body? Drinking and consuming drugs instead of eating the right foods and sleeping well. I imagine that exercise help but I don't know what exercise the tradie should do? I already stretch at least twice a day, in the morning and at night before bed. I also do bodyweight exercises. What diet should a tradie have? In the end, should I treat being a tradie like being an athlete?

I've read that you need to learn how to pace your self but I don't exactly know what that means. If someone could elaborate on that I would be grateful
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Only pussies don't wear their PPE "because it slows me down".
nah you just suck at your job bro, gitgud.
The thing I don't get is the most important PPE (glasses, boots, hardhat, earplugs) for most things doesn't get in the way at all its actually fucking crazy
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>I bring a 3m respirator from home
The half-face masks of those are basically the best I've found and worn them for years. Cheap, very effective and don't make breathing difficult at all, after a while you don't know its on. So you'd really have to be a fucking idiot not to wear one
Don't fall into this mindset man, just 30 minutes 3x a week of strength training can do SO much for you, not just strength but improves your flexibility, improves your lifting form for work, increases your metabolism and will make your days easier in the long run. Farmers and laborers might not have spent time in the gym in the past but they also walked literally everywhere, worked with animals, had no machines to help with their jobs, and much more commonly played sports and games. Even if you work a manual labor job you're probably more sedentary than you think
That too. It wasnt even bad. In one of the later days I tried a n95 and it seemed much harder to breathe through even though it was lighter

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i have a vertical menu icon and a button with an image assigned to it. the button consistently shows up to the left of the menu icon, and i want the menu icon to show up first. how do i do this?
This is your best place to go

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in which mr. furze digs a hole

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I haven't watched any of this guys videos, but is he like Bill Nye? Because I know some people who think Bill Nye is some total fuckhead clown just because his fame comes from making educational science videos for children. As an adult, I'm not going to spend my time watching Bill Nye Science Guy vids, but I'm also not going to be that guy telling my kids (lol as if I'll ever find a female to reproduce with me) what a moronic clown someone is just because they're trying to make learning a little more fun/engaging.

When I was younger, (and even today), I always wanted to dig an underground labyrinth, and as a child its cool to see people explore themselves creatively to inspire you to do cool things in your own life.

Honestly I wouldn't be surprised if this dude started this thread to get those who are easily triggered into watching his videos. Watching his vids and then complaining about it so others can watch and complain is basically giving him more money so he can make more videos to trigger you into watching so you can complain about those videos to others, who will seethe watching those videos, and post about how "bad" they are so others can enjoy how "bad" the videos are... ad nauseum.

>Channel your inner frustration into making youtube videos explaining WHY all of these youtubers are wrong/dumb/cringe to help mold a better society you want to live in
>Oh, turns out people would rather watch a project's progress instead of listening to a childish rant about how another person decides to spend their time.

Kids are generally more enthusiastic about life in general than when they grow up, and there's nothing wrong with that. If you're like most adults and don't need to be entertained by over-the-top eccentric personalities, you are under no obligation to engage them.
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Gotta love the targeted onslaught of youtube ads
absolutely disgusting, who lives like this?
>I haven't watched any of this guys videos, but is he like Bill Nye?
No, so your entire post was pointless and irrelevant to the discussion.

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I mostly built it out of stuff I had and scrap I could salvage, though the salvage and scrap was pretty good. I decided that I wanted to build an ozone generator during the covid pandemic, mostly for for, and to test sterilizing some stuff (boots, face masks, insoles, etc...)

So I built one, buying the ozone generator (an in-line quartz tube type with HV transformer) off of aliexpress for pretty cheap, maybe $90 or so, then using salvage for the rest of the parts.
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The large black circle on the bottom left is a blower motor that cools the ozone generator. The main power switch is an unnecessarily large breaker which powers the fan whenever engaged. The orange switch is the air pump power, and the ozone generator is controlled by the dial that you see. It's a timer so you can time the ozone generation. The power input is a regular computer style 120Vac input with a fuse (belt and suspenders).
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You can probably figure out what everything is here, with the exception of the top left. I didn't have the patience to wait for a desiccant tube from Aliexpress, so I widened the tip of a large plastic syringe with a soldering iron and filled with with silica, then I made a cover for the top that uses three pipe screens, platic-welded into 3 holes to allow for air to enter while retaining the silica beads. The then goes through the 12V pump, and into the ozone generator.

Unfortunately ozone destroys the elastics in masks, but it works great on de-stinking insoles!

My sterilization chamber, seen on the first pic, is a large acrylic bottle with two inlets. Ozone goes in one from the generator, and the outlet has a CBRN canister on it. This way I can sterilize things without filling my apartment with ozone.

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Post abominations, bad ideas, and stupid shit thats in the DIY spirit

Previous thread: >>2122116
311 replies and 56 images omitted. Click here to view.
>it washes its behind in the bidet
>or it gets the hose again
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Hello? Yeah I want the world's stupidest room divider, as quickly as you can.
And I want to be able to stare at its underside from my cold, lifeless, dead bed.
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Oh, you're home early! I put up those pictures in your study like you asked.
That shelf being different lengths on the left and right side honestly bothers me more than the pictures. what the fuck. who does that.

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what type of screw is this?
5 replies omitted. Click here to view.

Metric hex that was removed with a SAE hex driver.
you can't prove it's not a rivet
The lack of peaning or being shaped anything like a rivet is your first clue.
>t. 8 bit guy

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Does this nigga really do this by hand or is there some excavation equipment off screen? No way he removed all that dirt by just tossing it up.

150 replies and 23 images omitted. Click here to view.
Amazing all the people replying to you defending dishonest pajeet scam artists
They're white, quit yer bitchin.

Please tell me this is just a webcam from some zoo right?
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Rest in peace to whoever spent their final moments there
dont be silly
thats the decomp pool

how hard would it be to make one of these bad boys
28 replies and 3 images omitted. Click here to view.
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you know you're an actual fucking genious
pic rel is from a grape press
Ive recently switched this shit for a hydraulic cylinder on my grape press. It always been a pain to screw this. I just got a 12V hydraulic oil pump on amazon and got a hydraulic cylinder locally, installed on the press and it works much faster without effort.


I like it
>a wood press with some modern elements to make it easier to use and maintain

My dad installed a panel so he could switch between two generator inputs. He forgot to hook up the neutral from the generator, and when he turned it on the whole house went disco inferno with the 120v lights flashing out of sync and devices going crazy. Melted a power strip, and when reading at an outlet it was reading 240v.
Shouldn’t the 120 just not worked without a return path to the generator? How did it get 240?
Reading from the disconnected generator chassis to house panel ground shows open. And the neutral was disconnected.

In pic, the hookup was from the bottom generator cable to a top breaker (pulled here), with the outlet meant as the input for the other gennie (green wire) going to the other breaker, with the house connected at the main.
10 replies and 2 images omitted. Click here to view.
We saw 240V at an outlet with only one 120V breaker on in the house. So somehow it was still pulling the other hot side through to the neutral.
>He forgot to hook up the neutral from the generator,
This will cause the load side voltages on 120V loads to drift around wildly. There is nothing holding the house neutral to the actual cetner tap point of the source.

This happens a lot in utility systems when a neutral breaks. The 240V loads are OK. But al the 120V stuff goes either high or low.
Did you kill the main breaker?
Depending on the situation, you can get 240 with main+ gen
Faulty neutral.
But congrats on getting proper EU voltage.
You should really be careful and read more on split phase power and neutral bonding, you could easily backfeed something the wrong way and fry some appliances or shock yourself.

With no neutral point you had voltages all over the place. When you said all breakers but 1, did you really turn off every one? You could have had gen 120V into 1 phase ->phase 1 into a 240V appliance with a neutral->through appliance to neutral->neutral in main panel (bonded to ground)->outlet neutral. With the other gen 120V on phase 2 feeding the outlet hot, you'd get 240V total across the outlet. If your generator does not have a neutral bonding jumper (you don't want one for this usage), the generated voltage could float with no ground reference and allow this rather than returning on the neutral like it should.

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Previous thread: >>2137765

Here we discuss microcontrollers, SBCs and microcontroller accessories, such as Atmel AVR and attinys (Arduinos), ARM boards such as blue/black pill STM32, ESP32, RPI, and others.

>where can I verified quality microcontrollers and other electronic sensors or parts

>but that's too expensive

>I need a part that does X and Y, with Z specifications. How can I find it?

Comment too long. Click here to view the full text.
50 replies and 9 images omitted. Click here to view.
how large is your video data ? uart is pretty slow in computers. You will lucky to use few Mbps even if the uC is capable of 10s Mbps
Otherwise, usb is your friend if your familiar with it
>from a pc to a microcontroller
usually it's the other way around, what is the micro doing with the video frames?
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600x480@30hz at the minimum if its possible, ideally around 1280x960@60hz... if that's even possible over uart or usb.

Trying to make some sort of rudimentary display, I have the hardware side covered but I cant for my life find the most efficient way to send digital data over to the hardware. Stuff like pci, hdmi, DP or ethernet are of course out of question

Do you have any guide/docs to get started with video over UART? Specifially, is there any way to interface mpv or ffmpeg to uart/usb?
>pci, hdmi, DP or ethernet are of course out of question
That's not something that's done with a MCU, it's usually delegated to asics. even if you can decode those signals you will still need to write them fast enough to the display's controller over a coms interface like lvds.
You know most microcontrollers have less than 64K of RAM, right? If it could do anything with that much data it would also have either Ethernet or WiFi.

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I want to build a tiny flat in my attic or cellar. Whats the best way to keep it secret from my wife?
4 replies omitted. Click here to view.
Just go over to your girlfriends place when. You want to fuck. Trying to hide her from your wife in the attic is just asking for trouble.
Kill her she will never know
The Cuck Attic Flat vs The CHAD Underground Cum Dungeon
The phrasing seems off. It should be:
>Whats the best way to keep a secret wife?
Who are you intending to have use it?

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>How can I isolate the intermetallics to the grain boundary for ultimate edge retention?
We're not there yet.

Autistenitic Questions:
How do I not destroy my wrists?
Is a ball-peen hammer good for forging a convex surface on thick cylindrical stock?
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part 3 of 4
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part 4 of 4
Silver braze I mean
Where can I purchase eutectic silver-copper (AWS BAg-8) sheets?
Go to the motor company in Mena Arkansas and offer some nice whisney to the men smoking in the back.

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