/diy/ - Do It Yourself

>>705704
I have a similar calculator, but not that model. If you hit Mode, do you have an EQN Mode?

>>705510
>Even worse than that name fag Ellie.
Damnit, I'm going to have to step up my asshattery.

Hvac/R guy, consider the gauntlet thrown! :)

>>705107
Found the book...
Clinical Management of Patients with Viral Hemorrhagic Fever
http://www.who.int/csr/resources/publications/clinical-management-patients/en/

>>705059
>Ebola specifically:
Ebola is believed to be transmitted through direct contact with infected bodily fluids. Airborne transmission has not been proven or disproven. It is believed, but not proven, that bats may be carrier animals. The incubation period is from 2 to 21 days. The first symptom is usually headache, followed by back and joint pain, muscle cramps, disorientation\depression, loss of appetite, uncontrollable bleeding, bloody vomit, bloody diarrhea, and death.

The disorientation bit is particularly disturbing. A person may be fully aware they are dying of the disease and possibly infecting others, yet not care.

In crude conditions 10% survival rates are not uncommon. With excellent medical care this can exceed 60%.

The case in Dallas is not the first time that Ebola has touched the US Mainland. There were an unknown number of cases of ebola in a monkey quarantine facility in Reston Virginia in the late 80s. That strain, despite several opportunities to make the human jump, appeared to only effect Monkeys. (We were lucky.) Richard Preston wrote "The Hot Zone" about this and it is absolutely worth reading. Mr. Preston does a fine job of making the book read with all the suspense of a Michael Crichton novel.

>>705097
Anon thinks he is anonymous on the Internet. How quaint.

>>705059
Post-Apocolyptic Opiate Painkillers.

Poppy seeds are a common spice in the US. These seeds, if planted, (Felony) will grow into Papaver somniferum (Illegal), the plant that Opium (Illegal) and Heroine (Illegal) are made from. These are made by cutting the immature seed pods and gathering the dried sap that weeps from the wound.(Federal pound you in the ass prison illegal.) Another method of administration is to make a tea of the dried flower and seed pod. (both possession and use are illegal)

These are addictive and desperate addicts are extraordinarily dangerous, even in good times. These should only be used in grave emergencies, or as palliative care of those preparing to die.

It is also possible for the well equipped chemist to produce morphine from this source material.
http://www.erowid.org/archive/rhodium/chemistry/morphextr.html

It goes without saying that this is illegal as well.

The agriculturally ambitious might be interested to know that there are seed available commercially for a double-petaled black Papaver S. that looks nothing like the normal P.S., but still contains opiods. (Illegal)

>>705059
>personal protective equipment
Pic Related. Slow sand water filter.

Also, google and memorize Solarization for water purification.

.. and it's Hesperian, not Hessian foundation. Memory failure.

Almost done, 2 more.

>>705059
>maintaining oxygen status
I know of four /diy/ methods for producing oxygen.
The first is reaction of Hydrogen Peroxide with one of many chemicals to free its oxygen. This seems grossly unreasonable for an apocolypse as H2O2 is a PITA to /diy.

The second is electrolysis of water in a divided cell and is very /diyable.

The third is distillation of air, and is surprisingly diy-able. http://www.instructables.com/id/Homemade-liquid-nitrogen-generator/

The fourth is the technology used in home oxygen concentrators. A machine uses a pair of zeolite cylinders. In use, one of the cylinders is pressurized to 2-3 atmospheres. At this pressure, the zeolite readily adsorbs nitrogen from the air. After a time the enhanced air is purged into a holding vessel and administered to the patient, usually with a nasal cannula. To regenerate the zeolite, ambient air is introduced and allowed to flow through the cylinder. By alternating two cylinders between production and regeneration, a continuous flow of gas can be created.

>>705084
>personal protective equipment
A well prepared home chemist can keep herself in Bleach (for water purification and disinfection) using Electrolysis.

Conduct electrolysis of salt water using a number of electrodes at 4.5-5 volts. The solution must be kept below 40C/104F or you get a different and undesirable product, Sodium Chlorate.

The "strength" of the Bleach (sodium hypochlorite) solution can be determined by titration. This requires Potassium Iodide, Starch, and Sodium Thiosulfate.

The poorly equipped chemist is advised to stockpile Sodium Hypochlorite or Calcium Hypochlorite pool shock instead.

8 drops of 6% bleach solution will purify 1 gallon of clear water, given 30 minutes to act.

>>705059
>balancing electrolytes
Oral Rehydration Therapy
https://en.wikipedia.org/wiki/Oral_rehydration_therapy

- 30 ml sugar : 2.5 ml salt : 1 litre fluid
- 6 teaspoons sugar : 0.5 teaspoon salt : 1 quart fluid (approx. 1 litre)

This will help keep you alive if you get Cholera or Dysentery... the diseases you are most likely to get after a big natural disaster in refugee land.

Also, if you don't have "Where there is no doctor/Dentist", go download them now legally and free from the Hessian foundation.

>>704898
Given a small budget and a few hours to kill, I'd build a small electrolysis cell and hydrogen torch. Double-win, new tool and cool project.

(Also patently unsafe if constructed improperly. Fire, electrocution, and explosion hazards. Count me in!)

>>704553
>could the bodies perspiration be improved upon?

The US military has done some fascinating work on regulating human body temerature. The trick seems to be to encase the hands or feet in a heat exchange medium and apply a slight vacuum to bypass the body's internal thermostat-contracting-blood-vessels mechanism.

Another interesting technology:
Cut/stab resistance -> kevlar/stainless steel woven fabric, like that in cut resistant gloves.

>>704507
>Like the mechanical equivalent of digikey.
It's called "McMaster-Carr"
http://www.mcmaster.com/#nylon-gears

There was a company called "Small Parts Inc" that had a great catalog of this stuff. Amazon ate them, but you can still find PDFs of the catalog online and use them to order from amazon.

>>704513
>call around to coin shops and ask if they have any "junk" silver quarters.

Anon is correct. These are mostly silver. This instructable has the general process.
http://www.instructables.com/id/Make-a-silver-ring-for-25-cents/

This one shows a much faster way of doing the same thing.

http://www.instructables.com/id/Sweetheart-Nickel-RingPendant/

*Note, this second one is using a nickel. Don't use a nickel, it's not silver. It's nickel and copper. The process works the same for a silver coin.
*Note, this second one is by MrBalleng who is the king of improvised equipment jewelry. Check his other instructables too.

>>703519
>A hot air gun (or a hair dryer and patience)will soften it up if you want to freehand it.

Pic related was my first attempt at making a water deflector from plexiglass. Ignoring the pathetically sad plastic weld, I'm happy with how it turned out. I used a harbor freight "Plastic welder". This turns out to be a hot air gun with a pencil-sized tip. (impulse purchase)

>>703511
>Any good way to bend plexiglass?
A hot air gun (or a hair dryer and patience)will soften it up if you want to freehand it. If you want to vacuform it you can heat it in your oven. For straight bends you can use nichrome wire stretched inside a piece of U-channel as a heating element.

>>703011
Nice. Very nice. Thank you for rescuing thread with usefulness and App of not-suckage.

>>703328
>Some tap was slightly open which was causing it to be continious.
>It is caused when either I flush the toilet, or operate the show.

This doesn't sound like water hammer. Water hammer occurs when the flow of water is stopped quickly and the inertia of the water causes poorly secured pipes to whack into something. It sounds like a bang. Sometimes it's a string of bangbangbang when you have a fixture that oscillates from the water flowing through it. (Saw a toilet do this once.) I've also worked on a house where it would scream whenever you used the water. That turned out to be a defective pressure regulator. That fun bit there was that the kid told me he though the house was allergic to the water. :)

Can you localize the noise and describe it?

>>703330
>what is a basic equipment you need to /diy/ mainly to make your own little machines maybe at some point robots?

If I had $20 to spend, I would buy an Xacto knife and a hot glue gun.

If I had $100 to spend, I'd buy the above and add on an inexpensive drill, soldering iron, and jig saw.

For materials I'd use wood and plexiglass (that's what they call the sheets of clear acrylic that hardware stores sell here.) What electronics to use depends on your application. I have a robot that uses an OOpic and one that uses an Arduino. Both are autonomous. The OOpic is nice in that you can plug servos directly onto it without making a separate cable. The Arduino is nice because it has string processing capabilities and you can't swing a dead cat on instructables without hitting sample code for it.

If you want something you control via radio, look at RC car and plane stuff. You can get cheap, lightweight, and abuse resistant brushed and brushless speed controllers, transmitters, and recievers for a pittance.

If you want to make mechanical bits, have a look at the woodengears.ca site. I've used his gear generator more than once and they work really well when made out of acrylic.

Also, check your local Goodwill/Thrift stores. I found a Wowwee Robosapien for $8 at mine. I gave him a RasPi brain transplant and now he's my best robot.

>>703488
Pic Related.

>>703166
>You mean like doing nails until you level up enough to make full sculptures?
It's like Runescape, with eBay as the grand exchange. "200 Bronze Daggers, Buy it now!"

(Insert detroit/chicago::wilderness joke here).

>>703172
Water hammer shouldn't be a continuous thing. It's usually only triggered when a valve closes quickly. Is the noise in your radiator/boiler system or your water supply? Can you make it occur?

>>703001
I've been self-teaching chemistry for a few years now, and I enjoy it very much. I'd say go for it.

What does it for me is when I start with a raw, common, or off-the-shelf material and transform it into something else. The book "caveman chemistry" is particularly fantastic in this regard. I have, with its assistance:
-cut down a (small) tree with a flint axe
-made fire with from sticks
-made charcoal from wood
-made potassium/sodium hydroxide from wood ashes
-made lime (Calcium oxide), and slaked lime (Calcium Hydroxide) from limestone
-extracted sodium nitrate from compost
-extracted sulfur from fertilizer
-made hydrochloric acid, sodium hypochlorite, crystalline salt, and chlorine gas from seawater
-made sulfuric acid
-smelted (yes, I mean smelted) copper from ore
-made nitric acid
-took water apart (electrolysis) and put it back together (ignition)(burned the frack out of myself)(guess I should have read about that 5,000 degree flame -before- igniting the balloon. :/ )
-made thermite
-made clay from Tennessee subsoil
-failed repeatedly at firing crude pottery

Barring zombie Apocalypse, I will never be a professional chemist. Even so I do not regret the time I invested in learning so far.

>>701019
>I live near Tampa, and there's a HUGE demand for underwater welders, mostly because of the price and wait time for drydock space.

Do you know how much these guys make? I understood that the pay for this wasn't great, compared to the cost of commercial diving school.

Thanks!

>>702152
Well you see, Timmy... When the mommy plastic and the daddy plastic love each other very much...

All joking aside, The gif is quite lovely.