PH reading of colored stuff. Paint, Blood, etc.

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 10 days ago

I want to download pics on my Motorola ph to my computer w/o having to buy a charger, is this possible?

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

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... Answered

 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

How to build the EnvDAQ cards?

I got the instructions to build the pH and DO sensor accessory to the EnvDAQ circuit. But how to build the EnvDAQ? Also, a supporting code would be highly appreciated. Thanks in advance for your help.

Asked by chinmayeeraj 8 months ago

what chemicals aside from bicarb soda are present in pool ph buffer? Answered

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 6 years ago

helping a dedicated ECE student from the philllipines

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 9 years ago

Adjusting pH levels?

So, I am doing a science fair project about what  pH level is best for sea monkeys and what happens with the other levels.  Dies anyone know how to  adjust the pH levels easily in such a small amount of water??

Asked by kyluddy 4 years ago

Do cheap pH meters work?

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 7 years ago

Whould boiling lemon juice effect the ph level of the citric acid? Answered

And is there any way I could remove the sucrose? I want to as close to pure citric acid in the lemons.

Asked by 8 years ago

Trying to connect Samsung mb ph cord to IPad cord

Hi i have s Sansung galaxy S mb ph & trying to connect cords for tethering my Ipad. is there an adaptor available to join both Usb cords. thanks Kitty

Posted by Kitty532 5 years ago

How to Build a Microwave boiler controlled by raspberry pi?

I am looking to build a milk boiler with in pH sensor to  study the quality of milk at various temperatures.

Asked by ArvindhS3 7 months ago

Why is blk water basic instead of acidic?

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 6 years ago

Test Strips for Sale! (pH, Medical control, blue litmus and unknown)

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

What are some good alkaline flavors?

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

Need some help creating menus for automated aquarium monitor.

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 6 weeks ago

Dead Lawn--Fix Ph under evergreen trees.

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 5 years ago

satelite dish hack

Is there anyway a television dish can b used to make satelte phone calls useing a mobile ph???

Posted by dagyboy 8 years ago

Connect ESP8285 Development Board IOT to temperature, pH and DO probes

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 24 days ago

What is the point and what are the rules to the Photojojo contest?

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

Unable to enter instructable into the halloween photo contest

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 5 years ago

What is the difference between a CDS cell and a Phototransistor?

What is the difference between a CDS cell, and a Phototransistor? Are they both light sensors? Or only one? Thanks. Zem.

Asked by Zem 8 years ago

water conductivity meter

Hi does any one know how to build a water conductivity meter which measures in Microsiemens. as an added bonus i would like it to be able to measure other features of water quality such as the Ph value

Posted by tawcnysc 9 years ago

does anybody know where you could get free cell phone ringtones?

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

How do you turn a Blackberry Curve into a Skype phone?

 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 8 years ago

I am trying to automate a hydroponics system with many sensors and realys. Has any one done this before?

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

Homemade PCB Photoresist Developer?

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 3 years ago

how do i make a gearbox for a 12 v dc motor? it is already fitted with a metallic worm.

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

Are there any ammonium sensor for salt water with I2C interface?

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 4 weeks ago

How do i remotely track if a planted tree is alive or not?

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 11 months ago

problem using instructables on tablet and cell phone

 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

happy pi day!

For me, maybe not for you it is pi day today!march 14 is pi day (3/14)check out these links for more pi 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

Finding googols without a search engine!

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 8 years ago

so you don't smell like vinegar? Answered

If you don't want to smell like vinegar, your can use a small amount of orange or lemon juice (pH of 2-3.5) to do the final neutralization of skin contact with strong alkalies (bases) like concrete or lye. It's a little more expensive, but does the job and leaves you smelling much better. If you don't have either of those handy, you can use almost any soft drink which are all acidic.

Asked by JGDean 1 year ago

What kind of printer and computer to use for a photo booth? Answered

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 6 years ago

Cyanoacrylate accelerators?

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 5 years ago

A SIMPLE instruction guide on statistics and chemistry?

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 8 years ago

DC Motor Control Help?

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:

Asked by NickWeav 4 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 7 years ago

Can putting a magnet to a "non smart - non android" phone hurt the phone.?

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 1 year ago

Arduino based aquaponics controler

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 3 years ago

Violin tuning issue: Don't know how to tune D string Answered

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 6 years ago

How can I prevent aluminum jewelry from oxidizing?

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 j626no 9 years ago

What would be the best amplifier for these speakers?

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 ( ) 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

What are some re-purpose ideas for 4 x 6.5 rmp 3 phase gear motors?

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 1 year ago