PH is a color change indicator. So how're ya spposed to take the pH of blood, or color rich food, etc?
Asked by Toga_Dan 8 months ago | last reply 8 months ago
I downloaded the motorola wizard but can't access it to request my pics be taken fr ph to computer.
Asked by steph4me 8 years ago | last reply 8 years ago
If I have the pH and volume of 2 solutions, and the target pH of a combination of them, how do I calculate how much I need?
Asked by BretMattingly 8 years ago | last reply 8 years ago
Hello i just went to the dump shop and picked up a 4kg bag of bicarb soda as ph buffer for free, and when i got home, i noticed it smelt of ammonia, so i though it might have some ammonium carbonate, so i figured i could get rid of it by adding some water to the ph buffer and then boiling it. however, i have noticed that it turned my hands blue, and although the blue washed off, i am now hazardous as to what else may be in thr ph buffer, although it states sodium bicarbonate is the active ingredient. i plan on dividing it, selling 2kg on my site in 250g batches for $2 each, and the other i plan to use as a sodium source for my sodium reduction cell. i need to know though, what the other chemicals in the pool buffer are so i can state the purity of the ph buffer. also will anything lebeled as "soda ash" be pure sodium carbonate?
Asked by oldmanbeefjerky 7 years ago | last reply 7 years ago
Please somebody help me constructing a simple but an interesting tech for my up coming thesis in my college life. i need to have an idea to pass my course thx...
Posted by gabbzzz21 10 years ago | last reply 10 years ago
I have seen $10-20 pH meters for testing soil in garden stores, home improvement/hardware stores. I was wondering do these give accurate readings? I am looking for a cheap and accurate way to test pH. Any suggestions even for other ph testing methods are appreciated. Thanks!
Asked by rendermatt 8 years ago | last reply 3 years ago
Asked by Jioza Fernando 4 years ago | last reply 4 years ago
And is there any way I could remove the sucrose? I want to as close to pure citric acid in the lemons.
Asked by aaronscottaugustinhotmail.com 9 years ago | last reply 2 years ago
I am looking to build a milk boiler with in pH sensor to study the quality of milk at various temperatures.
Asked by ArvindhS3 1 year ago | last reply 1 year ago
Various testing materials for sale. I found them under my bed, in a bag with some safety goggles(let me know if you want some of them, i have like 8) I have no clue how much this stuff is worth so just shoot me a price and we will work from there.
Posted by ledzep567 10 years ago | last reply 10 years ago
What are some easily-obtainable flavors that have a pleasant taste when in an alkaline solution? Are there any suitable for flavoring a sweet beverage with an overall pH of 7 or above? (By alkaline, I mean actually has pH greater than 7 in your mouth. I'm not referring to those lists of foods floating around alternative medicine sites that are claimed to raise your urine pH.)
Asked by NobodyInParticular 9 years ago | last reply 8 years ago
Coniferous trees (pines, etc) acidify soil under em. Lawn doesn't cope wit this too well. Dump your old boxes of baking soda from freezer/fridge under pine tree. It works. Grass grows better. I'd do an -ible, but didn't bother to take pics. If you try it, maybe take before + after pics and post an -ible.
Posted by Toga_Dan 6 years ago | last reply 6 years ago
Recently I came across a brand of water called blk, named for the black appearance of the water caused by the addition of fulvic acid. The manufacterer's website states that it is "exceptionally pure artesian spring water" with the addition of the company's blend of fulvic and humic acid. Now, we all know that the PH of pure water is 7, but if we add acid, wouldn't that make it more acidic? Apparently not, seeing as the manufacturer's website also states that the PH of blk water is 9, making blk water more basic than regular water. I would think the fulvic/humic acid's addition would make the PH acidic, not basic. Can anyone explain this?
Asked by ALogan97 7 years ago | last reply 7 years ago
So I'm struggling to create clickable headers which move you to the second, third, and so on, level within this menu. I've successfully made it so I can scroll through three separate pages and select 5 separate headers on each page (as you can see here) but I can't seem to figure out how to go about adding more levels to my menu. I'd really appreciate it if someone had a look and gave me some guidance. As for my skills level, I'd say I've had a few years experience but still am not 100% fluent in all aspects of Arduino so some dumbing down may be necessary. Any help or guidance is appreciated thank you!!I've attached the code. "Aquarium_Controller_V1" is the main bit of code.**EDIT** -I've been playing around with the code some more and I think I have it figured out! But now my issue is that when I'm on a page that isn't the first level, I don't want the X-axis of the joystick to ++ or -- the PageVal. Any advice as to how I should go about that? Heres my new updated code.
Asked by harry88 9 months ago
Instructable had this great article on how to connect several sensors from Atlas Scientific to the Arduino MEGA 2560 board. See here:How-to-Make-a-Data-Logger-for-the-Temperature-PH-a/Unfortunately the 2560 does not have Wifi.I was wondering whether there is a similar write-up on connecting the same Atlas Scientific temp-, DO- and pH probes to the new ESP8285 IOT board, which does have Wifi. See here for detail:ESP8285 IOT BoardIt would be a great day if I can get some instructions and help on how-to as this is my first project of this nature. :)
Asked by achaninau 8 months ago | last reply 8 months ago
Asked by Crystalflute 9 years ago | last reply 9 years ago
What is the point and what are the rules to the Photojojo contest? The contest page says nothing about it.
Posted by n0ukf 10 years ago | last reply 10 years ago
I'm trying to enter my latest instructable into the Halloween photo contest but am unable to submit it. Can anyone help?
Posted by ridiculously.awesome 6 years ago | last reply 6 years ago
What is the difference between a CDS cell, and a Phototransistor? Are they both light sensors? Or only one? Thanks. Zem.
Asked by Zem 9 years ago | last reply 9 years ago
I would like to know were to get free cell phone ringtones without having to sign up or anything
Asked by winslow121 9 years ago | last reply 9 years ago
I have an 8320 T-Mobile Blackberry Curve. It's in perfect condition, but with no service. Is there a way to "hack" it so that I may use it as a Skype phone? I've looked on Crackberry and the likes, to no avail?
Asked by ohnoitsrhob 9 years ago | last reply 8 years ago
Sensors: Air Temp Water Temp Humidity Air Flow Light Levels Water Depth Ph Levels Co2 Levels in the Air Co2 Levels in the water Oxygen Levels Air Oxygen Levels Water
Asked by ckirchner001 5 years ago | last reply 5 years ago
I have four rs 385 ph motors manufactured by mabuchi..i need to make gear boxes for them to make them spin around 150 rpm and its already fitted with a metallic worm...any idea?
Asked by shaondip 9 years ago | last reply 7 years ago
This site has GREAT 'ibbles for ways of etching and transferring toner to PCBs. I still use photoresist and would love to know if anyone has a recipe for homemade developer. I know its mostly Sodium Carbonate, but there's some pH nonsense that needs to be addressed. Any help would be greatly appreciated!!
Asked by zaphodd42 4 years ago | last reply 4 years ago
Remotely i need to track/monitor if planted trees are alive or not, growing or not. So could you tell some parameters/characteristics of living trees like pH level of soil, moisture level, voltage across it when tree is alive. & required electronic sensors, technology for remote tracking/monitoring.
Asked by radkol 1 year ago | last reply 1 year ago
Hi, I am a newbie to anything electronic.I am trying to design an array of sensors for a salt water aquarium. I have found the DO and pH sensors from Atlas, now I need a temperature and ammonium sensor for the salt water tank, all with I2C interface.Does anyone out there know of any they can recommend?
Asked by achaninau 8 months ago
Hi , Im having a problem using the instructables app and web page on my cell and tablet. Once i sign in and go to the top right corner and click my picture for the drop down to go to my page of instructables or anything actually , It clicks on the Tech shop tab instead like it by passes or doesnt see the drop down choices ?
Posted by coolbeansbaby68 5 years ago | last reply 5 years ago
For me, maybe not for you it is pi day today!march 14 is pi day (3/14)check out these links for more pihttp://www.vvc.edu/ph/TonerS/mathpi.htmlhttp://pi.ytmnd.com/http://www.ballandclaw.com/upi/pi.50000.htmlhave fun :Pedit: okay, maybe you didnt know this yet but pi day was over a month ago now!
Posted by ich bin ein pyro 10 years ago | last reply 10 years ago
It is not often that you encounter a googol as a "measured" (or inferred) quantity referring to something physical. A preprint out today on arXiv:astro-ph presents a calculation of the total entropy of the observable Universe (in units of Boltzmann's constant, k), coming up with a result Sobs = 3 × 10104 k. The dominant contribution is from supermassive galactic black holes, for which the entropy is proportional to their surface area, which in turn scales like the mass squared.
Posted by kelseymh 9 years ago | last reply 9 years ago
I am planning on constructing a photo booth. I was wondering what kind of computer and printer to get that would be cheap and reliable. I need the computer to run XP and the computer will only have the photobooth software on it so it doesn't have to be super juiced up. and the printer needs to hold 200 sheets of 4 by 6 glossy photo paper. Any ideas?
Asked by undftdking 7 years ago | last reply 3 years ago
I just read about these substances that are usually sold in mini spray bottles or aerosol cans. They are supposed to be very useful when you apply a cyanoacrylate (CA) glue (aka superglue, etc.) over a somewhat large, flat surface, as they enhance the alkaline conditions to speed up the polymerization of the CA. Given this information, does anybody know if a CA accelerator can be made from scratch by regular high pH household materials, like ammonia or sodium hydroxide? If so, what concentration do you think would work?
Asked by jim5150jvc 6 years ago | last reply 2 years ago
A very long story short, I desperately need assistance in knowledge with some motor control. I need to control 2,DC 6v motors with encoders that include 6-pin 2.0mm pitch PH JST cables that break out motor inputs. The bottom line would be what do I need to control these motors, to go forward and reverse, and operate it from a wireless controller? I appreciate any and all help! Also, this is our motor: http://www.trossenrobotics.com/p/Robot-DC-Gearhead-Motor-6v180rpm.aspx
Asked by NickWeav 4 years ago | last reply 4 years ago
Statistics and chemistry equations are some of the most complex calculations for people who did not grow up in a science background but are essential for students looking to further their degrees in fields that require bio chemistry while students excel in practicals its the calculations that cause problems like log, ph calculations, various option in statistics when to use which rule. A better tutorial for college level statistics and from basic chemistry to college level would be appreciated by various students the world over. Thank you in advance all areas of these two fields would be appreciated.
Asked by Rainmakker84 9 years ago | last reply 9 years ago
HI. My mom is bed ridden and we have to give her baths in bed. We have tried several different foaming no-rinse soaps and have found on that works the best: Medline Remedy 4-in-1 Body Cleanser. It is good in so many ways, pH Balanced, Non-allergenic, leaves her skin soft, smells great...nice sort of mango-vanilla smell. Problem is, it's $10 + per bottle, depending on where we get it. Here is the product description: Remedy 4-in-1 Body Cleanser cleanses, moisturizes, provides mild protection against transepidermal water loss (TEWL) and nourishes skin in one step. Helps reduce odor. Optimizes shelf space and nursing time. Ready-to-use, no-rinse foam stays in place to prevent product spills, waste and patient discomfort. One bottle contains over 340 pumps of foam.Harsh soaps and surfactants strip skin of moisture and contribute to TEWL. Remedy 4-in-1 Cleansers have a phospholipid base that binds both water and nutrients to gently clean and condition the skin. Remedy cleansers contain ingredients derived from natural and organic oils that mimic the body's natural lipids. Remedy cleansers can also be used during showers in place of soaps. The phospholipids will gently cleanse the skin without stripping it from its natural oils.Olivamine is a blend of antioxidants, amino acids, vitamins and methylsulfonylmethane (MSM). These ingredients are all known to play a vital role in basic cellular construction and protection. Olivamine contains antioxidants like hydroxytyrosol, the most potent antioxidant known today (derived from olives). It also contains amino acids like L-proline, L-cysteine and glycine - three of the main building blocks of collagen. These components are also treated with photoacoustic resonance to help minimize the tendency for inflammation, and to ensure they can be rapidly accepted by the skin.No-rinse foam for head-to-toe cleansing and conditioning. Indicated for hair, body, perineal and peristomal areas.Remedy is a trademark of Medline Industries, Inc. UPC is: 0 80196 30616 2 CAN ANYONE COME UP WITH A LESS EXPENSIVE, HOME-MADE OPTION TO THIS? Thanks
Posted by oreoero 8 years ago | last reply 1 year ago
My husband has a Sprint Kyocera flip phone. It is the kind that has the walkie-talkie function. He works on the big Caterpillar machines and just sets his phone down next to him. Last week it vibrated off and was lost in the mud. I bought in a new one and he lost that one also, but found it. Oddly these were the first phones he lost in years. I want to add a magnet to the back of the phone so that when he sets it down it does not vibrate off of the metall? Will this hurt the phone?
Asked by dani eggert 2 years ago | last reply 2 years ago
I know how to tune everything but the D string. I keep going up and down with the fine tuning, but to no avail. Here's what I've got: -Violin is made in China, but it's somehow better and lasted longer than most violins here in the PH (Philippines) -I have a pitch pipe to assist in tuning, but when I hit D, it's somehow muffled (in a way) and I can't hear it clearly, so I can't differentiate between what I'm playing on D at the moment, and the pitch pipe output.
Asked by nutsandbolts_64 7 years ago | last reply 7 years ago
Hi guys, im new to the arduino world but im really enjoying getting to know it. i have a small aquaponics setup and i would like to build a arduino controller so i can see whats going on there. such as water temperature, pump, eventually i want to add automatic feeding PH levels. my water pump is a DC 1000 gal and hour pump, i usually leave it running and i would like to be able to run it on and off as needed also i want to divert the same pump thru DC solenoids to water my beds. so any help would be greatly appreciated.
Posted by elilco 4 years ago | last reply 4 years ago
In my instructable about making an aluminum ring, I made two aluminum rings, one for my girlfriend and one for myself. Mine is still fine; however, hers keeps turning black (oxidizing). I understand this is because she is a girl and her skin pH is different than mine (more basic); but I am curious if there are any techniques on how to prevent this from happening. The ring needs to be polished using aluminum cleaner every other week, but if there was a way to keep its mirror finish, that would be fantastic. Thank you!
Asked by kreationism 9 years ago | last reply 9 years ago
I was given 4 x 6.5rpm 3 phase gear motors from a tug boat. I need some ideas on what i should do to re-purpose them. My first thoughts were some sort of baby carousel or baby rocking machine, they're very quiet and my boss is about to have a baby. The only issue is that I doubt his house has 3 phase distribution so I'm looking to build something useful for around the shop. Edit: They're 0.5hp motors
Asked by NickolisB 2 years ago | last reply 2 years ago
Hi guys, a few time ago I needed a set of speakers for my PC so I brought back to the light two speakers from my old Philips Hi-Fi ( http://imageshack.us/photo/my-images/216/28505497yt5.jpg/ ) and a set of 2 broken PC speakers that I didn't throw away when was time to... So, long story short, I used the PC speakers circuitry to supply my Hi-Fi speakers and plug them to my PC. Now I was thinking if there is any way to give a better supply to these speakers in order to get a better sound. Speakers: FB 545 PH Impedance: 6 ohm Watt: 100 Thanks :)
Posted by Nimrail 6 years ago
Hello, i just ripped apart a sealed lead acid battery, and have salvaged the plates, but now i have a problem, two actually i have two types of plates one is red-brown, the other, light grey , which i suspect is just lead, which, through my powers of deduction leaves me to beleive the redish crystaline substance that makes up the positive plates must be lead sulfate. what i want to know, is what this red substance is, and if it is lead sulfate, how do i convert it into sulfuric acid? ive tried electrolysis, but the ph doesnt seem to change beyond normal, for plian old hho electrolysis! am i getting something wrong here?
Asked by oldmanbeefjerky 7 years ago | last reply 7 years ago
Via The UberReview"It is not too often that we associate solar-powered with anything fast and or furious, but perhaps it is time that we start. The Czeers MK1 is a 10-meter vessel covered in photovoltaic cells that is capable of hitting speeds of up to 30 knots (55.5 km/ph to you non-nautical folks out there). While there are certainly faster boats on the water, those tend to use obscene amounts of fuel. The solar-powered Czeers MK1 is naturally going to be a lot quieter than its gas guzzling cousins, which would make it great for sneaking up over fish (though there is limited space to put them if you catch them. I would like to see a similar model with little bit more space for passengers, even if it did mean sacrificing some speed. Speedboats are so limited in what they are able to do, but if this had a little extra space, it could do so much more."
Posted by laminterious 10 years ago
Only very recently i've been hearing a sound in my headphones and it sounds exactly like when i would recieve a text message or a phone call(with a much older pair of headphones). The difference being there is no phone anywhere near me and i've never experienced this with my current pair (wirelss Logitech F540's) and i've had them over a year, even when i'm using my phone right beside them. Its recently also being happening to my housemate who lives accross the hall from me, we've both tried turning our phones off and asked for our housemates living below us to do the same, but the problem persists. Could there be some device that is causing the problem inside or outside of the house that i havn't thought of? And is there a method of fixing the headphones/speakers themselves. I'd like to get to the bottom of it! :D Cheers.
Asked by Dracoda 6 years ago | last reply 6 years ago
My TI Nspire CX CAS just arrived in the mail today! It's an upgrade from a TI84, and my reliable old TI82. Just a quick search yields a lot of information on how this calculator can be used as much more than a graphing calc. There is software available for scientific use, which incorporates specially designed probes to measure everything from sound to pH levels. One that caught my eye as a possible diy project was a microphone. It appears that there is an application that is capable of measuring and mapping sound waves. An interfacing microphone. Can't be too difficult, can it? As soon as it arrived, I popped on to Instructables and did searches for anything Nspire CX related, but received the dreaded "no results found". I'll have to get to work. Does anyone have any experience with this calculator or it's data functionality? Thanks!
Asked by huck alexander 6 years ago | last reply 3 years ago
Origins used to make a cream called "Leg Lifts." It's loaded with menthol, Eucalyptus and a bunch of other stuff that makes your skin tingle. I would use it after really long bike rides and it was like a cooling chemical massage. They have now stopped making it and no more is available so I was hoping to reverse engineer it. It was a smooth cream the consistency of ketchup or a heavy hair conditioner. I think I can work out the things that make your skin tingle, but I have no idea what to use for the suspension medium. I searched for foot creams and salves and what I found didn't seem like a good fit. I figure once I come up with a suspension medium, I can just add powdered menthol, eucalyptus, tea tree oils and such until I get something that does the job. What could I use for this suspension medium? It has to be pH balanced, hypoallergenic and edible.
Asked by Marsh 8 years ago | last reply 8 years ago