Experiment: Arduino Pressure Sensor inside a DIY Inflatable 

It doesn't work because it is a differential pressure sensor, if you put the whole thing IN the bag, the compared pressures are exactly the same, even if you hit it and it shows a reading difference, it is not operating correctly, you need a tube.

This is a differential pressure sensor. It has a small hole at the bottom and only measures the pressure difference to the air connector at the top. Otherwise, you could only measure the absolute athmospheric pressure, wich is useless in this case. You don't seem to be trying to measure the altitude over sea level of your lab ;) You want to measure the pressure of the inflatable relative to the ambient pressure, so you have to connect a tube to the air connnector at the top of the sensor and put that into the pillow or you need to use a t-connector at the output of the pump and connect the sensor there. Don't try to measure pressure while the compressor is running. Once in a while stop the compressor and wait for > 100 ms before measurements. The pressure oscilates massively due to the oscillating output of the compressor when it is running and for a short time after. I have built two complex machines using this approach and it works perfectly. I use the mpx5010dp (0-100 mBar) sensor for balloons and larger inflatables. It is not cheap (about USD 20) but measurements are very precise. You will need a sensor for higher pressures if inflating these small pillows so tight. MPX5050DP should be fine. It goes up to 50 kPa/500 mBar. You can calculate pressures in kPa or mBar with a very simple formula written in the data sheet.

Hi Becky! Thank you so much for your wonderful video! I really enjoyed it and learned a lot. I have a question for you. Is it possible to build a prototype of a pressure sensor pad that can activate a compressed series of springs to restore to its original form upon a big impact on the foot? Please let me. Thank you!

It's a differential pressure sensor One part should be out and the other part of the sensor must be inside the bag.

Thank you Ms Becky! your video is very interactive. I was going to go with the pressure sensor likely the one you are using but I'm reconsidering it now as troubleshooting it will waste a lot of time. Thank you for saving me a lot of time whilst sacrificing yours. Pretty impressed with your diy airtight pillow :)

I"m wondering if just the sensor tip should be inside the bag, and not it entirely inside. Maybe it needs a differential pressure to measure, putting it entirely inside there is no pressure diference.

I'm proud of you for leaving in the part where you forgot to connect the sensor. Who has not done something similar?

hello ,mam Can I use Omron 2SMPP-02 sensor in place of this sensor for STM32 Or Ardunio if I can use plz suggest me the ckt diagram for it . because its output voltage is 3mV and plz suggest the ckt diagram for amplifying the output voltage

Can pressure sensors be used to measure weight of a storage box?

what is the voltage input needed for that pump?

Hola, muy buen video! ¿me puedes recomendar algun sensor para medir la presion que ejerse un liquido dentro de una manguera? la misma nunca superarara los 80 cmH2O y el fluido sera suero fisiologico. la manguera es fina de aproximadamente 4 o 5mm de diametro. yo tengo un sensor US9116, pero no estoy seguro de poder usarlo con un fluido liquido de suero fisiologico, ya que creo mide presion de fluidos gaseosos. GRACIAS!

Becky what is the SI unit of this numericals (522 and etc) you are getting? Thanks in advance

Can you share an idea how to create airflow meter based on pressure differential manometer, using simple bmp280/ bmp180 sensor.. thanks

nice video. I have one question. I want to make inflatable bubbles. It needed to air cap so how you get to air cap which you have sing piece.

No tengo nada mas que decir mas que mil y un mas gracias, eres una crack , eres increíble!! Desde Colombia gracias!!!!!

Hey Becky, Good informative video. Do we have any pressure sensors that measures the pressure of Helium inside an Helium balloon. If you know of any good compact ones, please let me know.

Dear Becky did u solve the problem. i have read that sensor via pic microcontroller also made some opamp amplifier circuits i think the main problem with this number of pins is wrong opposite to a normal ic

Hi Becky, I spent hours try to get the little MPS20N0040D-D pressure sensor to work like you did. The problem is the "specs" on the internet are wrong. The OUT + is pin 4, not pin 3!!! If you try any of the examples on "The answer is 42" web site they won't work unless you use pin 4 instead of 3. Voila!

How can i test the sensor alone if its good or bad?

Hi Becky ! Thank you very much for sharing your experiment. WHat kind of glue did you use for this ? It looks really strong!

Dear Becky, firstly thanks for sharing but we starter, need something real working. Maybe you can use any ADC 16bit or more up. Can you re-test and share again with this way. Thank you

Hi Becky, I need to take a voltage value from this sensor but ı didnt convert the 24 bit adc value to voltage value. Could you help me?

WHat is the difference between LM358DR and LM358P Op Amp? Which one to use?

I'm trying to incorporate a depth sensor with couple thrusters using an Arduino

It is a different presser sensor, it have to be out side connected to in side..

can sensor be used for liquids

I like this video. She is fun :). Very cool, interesting even though I haven't really watched many like this. So thanks & good job! : )

Can you give me the pressure sensor s/ and info please.

Hey Becky, The glue it´s not available anymore in this link.

Je ne peut pas regarder le vidéo pourquoi svp j'ai besoin de ce projet pour ma soustance

Hai Becky, i need to measure the pneumatic line pressure from 7 to 10 bar....is there is any sensor like this at low cost..??

a couple of years later then you but what brought me here? well, I'm thinking of a way to have an arduino meassuring depth, so basicaly the same setup you have but when the bag is going under water it will compress. for my project i am going to try out a BMP180 btw, Thx for your video

Hello, may I get this Sour Code

Isn't that pressure sensor a differential pressure sensor it has ports on the side for atmospheric measurements And one main port for the pressure side?

Hey I think a the pressure sensor pin is floating so it needs to be connected with a pull-up resistor in the code.

it would be interesting to add some code to read back the actual pressure inside bag instead or reading just numbers in the serial output. thanks

One end of the sensor must be outside the pillow to register the pressure differential. Put a hose on the stub and seal the hose in the pillow with the sensor outside the pillow.

I have question for you can you help out please

Congratulations from Chile, for your video.

This video came up while searching Arduino air pressure projects. Interesting experiment and I like that you didn't cut out the mistake. We all have those moments. The sensor is most likely a differential/delta/relative sensor that needs to have a reference outside of the inflatable(may have an air hole or flexible membrane in the back of the sensor.) If it was an absolute sensor it should work inside the inflatable and give you a good reading. The down side of the absolute sensor is altitude compensation. Here in Colorado(5300 ft) my air pressure is ~12.5psi/84kpa and sea level is ~14.5psi/101kpa. That 2 psi difference could be enough for an inflatable to pop. Now you need a second sensor to measure the barometric pressure before airing up the inflatable. The best option is still the differential/relative sensor with a reference to the atmosphere(barometric) Note: the weather station barometric pressure is a altitude compensated value.

Your kitty litter video brought me here. I was trying so hard to figure out what your job was. You seem to be having such a good time 😊 i heard at the end that your in school. What kind of profession are you going for after graduating?

I have a question Becky, I want to know the exact value of pressure. Arduino can only read the value of 0~1023. How can I know the exact value of pressure??

why don't you a flat blade for doing window tint on your seams

Hey, can I have the full coding for the pressure sensor? Tq for ur help

Not connecting that pressure sensor- sounds like something I would do. Hahahaha! P.S. I'm so tempted to get some glue and stick pieces of vinyl together.

Nice video. Well, I've been working on making a water gun using 2 litre Soda bottle. The idea is to use the pump to fill the bottle up, once we get enough water take the input pipe (of the pump) off the water source and let the air fill the bottle hence building pressure in it. The output is the air compressor gun that throws out the pressurized water. I was looking to find a way to monitor or regulate the pressure in the bottle (don't want it to blow up). I wanted to stop the pump at certain pressure. Was very excited when I saw you using the same pump and doing exactly what I wanted. Will give your schematics a try, if I succeed, will let you know.

Hi, sorry not sure if anyone else has already commented on this, but that sensor is a differential sensor and you have put the both ends, measurement nozzle and the comparative atmospheric windows in the same space, which practically means that the gradient measured is 0, hence no reading.

yo should put sensor outside with connected sensor process input with tube to this air bag.

Where are doing these experiments, the faces of others around is priceless :-) good luck

Hey. Your cat litter video is hella bomb. And you nerdy and cool. And then i see keto on your channel? Girl you're killing it. I love you. Be well.

Ok i will tell, I need to build tyre pressure sensor, so my key word is in RU-vid “Arduino pressure sensor” finally I watch this, thank for sharing this, good luck with your project.

Good job.

Hi Becky, I'm just starting my PhD this semester working on pressure sensors for tires using 3d printed sensors I was really hoping you get lucky with this project so that I can follow your steps. However, you gave me some ideas such as using the Arduino which I have never used before. I want to evaluate sensor performance on all aspects like speed, load,pressure, tempreture, Force,...etc. if anyone can help me please let me know. Thanks Becky and All

you help me a lot

I hope you will make alot of electronic videos! You are funny 😀👍

you are amazing!

Shouldn't respond unless it's an absolute reference. Should just have and tube connected to the bag and then connected to an external sensor, which will be referenced to atmosphere.

Nice work. I’m curious to find out if you eventually get that sensor working. So I subscribed. :) I’ve been working on heat sealing polyethylene shapes for a few years. Seems like pretty useful thing to have a low pressure warning on some products, or the self-inflating feature you’re working on here. I haven’t made any videos yet but might do so someday.

Это датчик можно использовать для турбины?

Well it's said tha you learn more from failures than from success, doesn't it? btw I learned a lot from comments: this is a differrential sensor! compares air presure from above to the hole beneath! saved me lot of time! you asked what brought me here: our government in Argentina connected a WHOOOOLEEE bunch of new users to the wateer netwrok....BUT the managment company DID NOT add pumps so..water pressure is low...and I plan to make a buz from that!! lol ( I mean installing automatic pumps)

Hello, Everything was good except for one small point that caused incorrect results. The sensor needs two different air pressures to measure pressure. One is the reference air pressure, where the sensor is located and against which it measures the secondary air pressure. The second is the secondary air pressure, which differs from the reference air pressure, and we intend to measure this difference with the sensor. For the sensor to function correctly, the sensor body must be outside the measurement location, where we have the reference air pressure. The air pressure we want to measure should be directly connected to the sensor's tube interface so that the sensor can read the pressure difference between these two areas. When the entire sensor is inside the chamber, there is no reference pressure to differ from the secondary pressure, and the sensor will have no output regardless of how high the internal pressure rises because there is no pressure difference.

thank for sharing. maybe you can get some ideas from this site i have found.

Hello, nice work dear, but for the sensor to work we need to put it out side the bag and only connect a little tube inside the bag. this is because that pessure sensor has a little cavity in the bottom for mesuring the amount of distance in a very little diafragm.

I got a suggestion just to check it out I guess u may have to place sensor to a rigid area where the force of air acts only one one side of sensor may be (Top) as the sensor is just placed inside the transparent bag kind of pressure is acting equally at all sides so the forces are nullified and no much difference in reading is seen..... pressure is as same as force...if we want to calculate we have to fix the base of sensor to rigid surface and force has to be applied from opposite side. ..Give a try ....might help you Thanks 😊

thanks lady

Can i know pressure sensor name and sensor number

And now? Did you do the correct setup? Where is the follow-up video? And what the hell are you working?

you're awesome

"tempted to remove this from the video, but I kinda want to exhibit my shame". I couldn't find that thumbs up button fast enough.

not connected to anything, happened to me too once

Nice 👍

Ok so. Hear me out. You know how animated cos wings work. Well. I think this is a good idea for making them ultralight, strong, with a smallll computation unit capaple of carrying out fluctuation. This is actually a really really really bomb idea.

Also i think you just gave me an almost... Blasphemous idea for a bomb cosplay.

Hi Becky I'm thinking of doing something not even remotely similar would like to do the same with much higher pressure with oled with menu for setting upper and lower lower pressure limits and mosfet connected to car tyre pump to pressure vessel and gas solenoid as trigger. Trigger connected to IR proximity sensor and barrell loaded with dog poo so I can conceal it near my door and remotley shoot shit st door to door sales people and my mother in law. Would also like IR proximity sensor switch to camer to cspture the highlights. Don't really need help with coding or hardware so I don't really know why a shared it however if you wanted to make a girly version of a of the self inflating pressure controlled proximity sensing poo cannon that shoots rose petals or chocolates or something less insidious than poo then go for it I'm sure your subscribers will love it

Leave it in the sealed bag and then push the bag underwater - the deeper you push it down, the numbers will change.

Thank you for this helpful video madam.

Hi Becky. I like making games. Recently I made a game halfchess.com . I want to make some AR games next and want to come up with a glove that has a pressure sensor in it. Thanks for making the video. If you wish to write back, you can do so from the `email us` button (in footer) on halfchess website. Cheers

So ginous

why that girl on the back is sooo unhappy?

ale łapa

.HTML

supper funny :))

Smart woman.. sensor can't be inside.. only tip of it ..otherwise can't measure. Not at all.... can't believe so short thinking.. just imagine throw glass into water and it will not crack at 100m deep but put the lid and it will break the glass.. think why.. think why sensor is good.. that is what they made input for air.. and not said to fit whole sensor inside the tank.. haaaa I don't believe you mention some designs .. this was no brainer.. it requires to have difference by putting in inside the bag you created no difference in pressure and it need to be In Normal pressure and only inlet to be pleased under the pressure..

Don't make any more such clever designs ... haaaa

Al parecer.....es ella la que se quedo conectada a la bomba de aire..