Part 2: Hi-Res Pressure Sensor Matrix Mat finished 

Please upload the "falling off the table and swearing profusely" video.

5:33 Jesus christ, what are you doing to your router?

Marco, your "Oh Shit" moment almost made me blow my coffee all over my screen. Impressive that you can even see your individual toes. Nice work.

listening to this i suddenly realized just how amazingly complex our skin is. it's like a super-high res pressure sensor matrix. now.. imagine the wiring schematics :D

"I have grossly underestimated the time it takes to do this..." I have a prototyping and manufacturing company. This statement should be the companies moto. We have a rule. If we have never done it before, estimate the time, with the usual +30% buffer and then times it by 5. That might get us close to what it actually takes.

Man, you deserve a medal for such patience. Good job

Many hours in the service of can I get this to work! Great application of engineering knowledge and practical abilities. Thanks for taking the time to make this video Marco. Mark

people like you is the kind of people that make science interesting

This will get on trending in the year 2020

You're going to be a very successful RU-vidr, I'm sure of it! Well done! :) I'm very impressed by your skill-set. I'm 48 and am very grateful to people like you that are willing to share your projects and experience.

Love your videos mate. Fantastic sense of humour. My favorite electrical you tube channel

That magic 3M Z Axis stuff looks amazing. Thanks for the tip!

The sensor matrix is such a cool device. Like wow that is truely a useful too for so many applications :D great work!

I've been waiting for this video, you're amazing man. huge thumbs up.

Macro reps relased new video :3 that will be highlight of my day

Wow that's unbelievable, it is even capturing the foot shape, amazing

The fact that these was done 4 years ago is so impressive. I got a future project boss I want to do but I don’t have quiet the funds yet to hire a full team. But if your still alive in 2025. I’m definitely hiring you!

how to make an iron pressure plate in real life

I have to admit I really love your videos. Great projects an great style :)

Great project!

Very very cool project no doubt! Congratulations Marcos!

This was an interesting build, thank you for sharing! Also, love the comic relief. Hope you didn't get hurt too bad from the fall

Aw man, you had me at the feet shuffling with paper bits and of course the door, but the dog at the end was just perfect.

Interesting project, it's helped give me an idea for one I was thinking of. Never knew shift registers could be used in such a way

Awesome!!! Glad you're OK!!!

Thanks! Well done. Great project, big fun - to watch.

This is a very cool project! Great job!

Love your dry humour. Good on you.

Something like this makes the Sensel Morph seem all that much more amazing and cost effective.

Liked and subscribed, this project is awesome! Also, I love your workspace

Hilarious video!! Good on you for persevering

This reminds me of the Madrona Labs Soundplane instrument. Very nice work, mate!

only a german- amazing! I've been wanting to build something like this for years, but all those shift registers. time to get some of this velostat stuff. dog at the end was perfect. subbed

Man I love watch your videos. Super funny stuff. I know nothing about electronics but sometimes I fall asleep to this shit. Two thumbs up

The to be continued meme just killed me great videos keep it up

Interesting project, an you did professionally indeed.

Wow, nice work!

Couldn't you use cheaper aluminium tape, or would the oxide layer be an issue? ( copper will oxidise over time ). Something else that may be worth a look is Bare Conductive paint - a low-cost carbon based paint that can be screen-printed Instead of HC595's+diodes, check out the NPIC6C596 , which is like a 595 but with open-drain MOSFET outputs.

Very interesting project and build. I'm getting a back ache just watching you lay that tape :)

This is very similar to my degree project where we made two insoles for measuring pressure underfoot at 7 by 14 points at 20Hz. One main difference between this and ours is that our row and column conductors were conductive steel thread that we sewed into fabric on either side of the velostat. We then used our small NRF microcontroller which was mounted on the heel to send the data to a nearby cellphone using Bluetooth LE for storage and a windows app for displaying the pressure. Sadly it wasn't in real time, and the velostat wore out after around 14 participants so we weren't able to get a large enough sample size to train a classifier to detect different foot issues. But it was relatively cheap, only around $100 per foot including microcontroller and enclosure.

Wow, this is an amazing project! Well done! Please post a follow up video!

Another great video. You're an inspiration.

hnnng dat roundabout playing just for a second. such a good song :3 Awesome project and video of it, thank you very much.

Fantastic work, man!

I feel like this could be a helpful edition to home security, albeit done at a lower level with lower resolution. You could have pressure sensitive rugs that detect human footsteps, and can distinguish them from your dog or cat.

WOW, excellent Video and project

I love your channel so much

To the point beyond reason! And beyond!

5:33 “Dad why does the wifi keep hanging and going down”

That is very very impressive!! That could be used with composing different rhythms to support gait retraining! Oh a Music Therapist could do the coolest stuff with that!

The fritz box is having a good time hanging out there

You say you'd rather never see the thing again. If you're ever gonna burn it to bits, I've love to take it and add it to my garage gym / experimental physio lab where I'm using a bunch of depth cameras to gauge the imbalances in my movements. :) I've always wanted to make a pressure mat for that data point but I'm sadly more of a computer vision kinda guy than hardware. This project is amazing by the way and I'm hoping I can try my hand at recreating this in the future!

Wow. This is brilliant!

that poor fritzbox at 9:34

Love this video. Earned a sub and notifications!

Very cool! I'd love to make an art project with it. Making an audiovisual interactive experience would be awesome with this :)

Amazing project!

You're a genious !!... With a German sense of humor. I like it !

I once tried to make a pressure sensor based on capacitance instead of conductivity, though much smaller (palm sized). It was just a PCB with individual (non multiplexed) pads, a thin layer of some sort of rubber sheet that was lying around, a copper foil and a final top protective layer of transparent plastic from some bag of cement or something. The measurement was by setting an output high then making it high impedance and measuring how long it takes to go low, which would be a few hundred nS up to maybe a couple of micro seconds. It worked, sort of. Not very accurate (about 20 steps) and very different sensitivity between the 'pixels' but I think with some more time and effort the principle could be refined to work very well. It needs many IO pins and I used several 40 pin dip PICs as I didn't have the skill or meams to work with high pin count SMDs.

Impressive work!

That SMD sticky tape is really neat.

Great job, man!

Great video You honestly made this whole thing really entertaining to watch - Good Work!

"I am a proffesional, i know what I'm doing."

Very interesting project

Awesome project!

Huge project!

i ordered on the jlcpcb thing too, took 3 weeks. quality is fine. but its +10$ shipping. still unbeatable price.

Marco's bizarre electronic adventures?!!

7:27 I just died because you almost did with this JoJo meme.

Impressive project.

Excellent. Well done

This would make a good addition to a security system

7:27 It was at this moment Marco knew.... He f'd up

amazing. well done

So fascinating!

professional fall man!

Awesome content!

Awesome video!

That was amazing

I adore the hanging FritzBox

awesome, dedication

Possibly useful for gait analysis (weight bearing) in patients with arthritis or other lower limb issues (asymmetrical limb length for example leads to hip/spinal problems). Slight differences often go un-noticed by sufferers until they turn up at their GP with back-ache. Gait analysis is a technique commonly used in disease modeling where pain reduces the weight placed on one limb. More complex analysis compares actual x-y positioning of foot imprint and sub-areas where weight bearing varies (e.g., fallen arches, in/out-turned ankle joints and so on). So yes, far from being simply a bit of fun, I'm sure the medical department of your local university would be interested in something like this.

Cool! This makes me want to make a MIDI controller with the same technique :)

Will be the best security system.

In the future, printable ink could be a good solution to replace the copper strips. You might just have to deal with lower sensor voltages. Very cool series.

Awesome project. I can think of a million uses for an input device like that! I’m new to the channel but have been loving everything I’ve seen so far. Keep up the great videos man! 👍

Hi dear i am your new subscriber thanks for the beautiful Electronic art

7:30 oh my god I was not expecting such an emotional roller coaster

I've made something very similar. A 32x32 printed pressure sensor. I used a single voltage input and 3 4067 16 channel analog multiplexers. The 32 sensors connect directly two of the multiplexers, and the third is used to select between the two (it has 14 outputs unused so you could relatively easily scale it to 256x246 arrays by just adding more multiplexers). That way you don't need diodes. The multiplexers need a 4 bit address, so each axis is addressed with a shift register (first 4 bits go to the upper level multiplexers, second 4 are connected to all the lower level multiplexers). The output is basically a mirror of the input going into the analog in via a potential divider (with adjustable gain via another 4067 multiplexer - selecting 16 resistances between 200 Ohm and 1 MOhm). Your code is certainly a lot faster than mine at sending the data to a computer I send both the address and resistance in plain text and get

Great .. can make a good scoring system for martial arts like the Daedo or KpnP systems used in Taekwondo

thumbs up for meticulous job

At least you have the right attitude

Dude, you executed this project gracefully. It's so neat! I did something similar on a more dense / smaller scale for my university dissertation, which meant I had to write almost 100*pages on it :( Regarding the blurry reading, I would suggest using a hard bottom surface. just for tests, remove the yoga mat, i expect it to improve the reading a bit, if not then forget that. Also experiment with varying discharge delays, i find anything less than 5ms is not stable, but this is of course dependent on the sensor.

This is so cool. I wonder if this would work to turn on and off the lights in a room as people come and go? If placed on hardwood and only run under the carpets and runners this might work. I was thinking originally motion sensors which comes with its own problems. This doesn't need as much resolution as what you are creating. Can't wait to find out what your results are.

Brilliant

Wow, amazing work. Your video is funny, lol.

I would've used a large wooden stick + right angle or a laser level from Ikea to lay out those strips instead of having those "separators". But I understand trying to get something quickly "out of the door". The results look much better than I expected, would be interested to see if slowing down the ADC or using some faster ADC would yield better resolution. Even so, I guess it outpaces many commercial solutions that cost [tens of] thousands. Not sure on the application, it might look like radiation therapy/imaging, but localized weight doesn't really translate to energy density. Would be great for developing mattresses though...

I use JLCPCB all the time

Cool! I wonder if a similar pressure mat has been made for gaming yet.