• Contant
  • Project
  • Assigments
  • About me
  • HOME

Fablab Seoul

JIN`s Fab Academy 2018:
How to make almost everything


My Project

My project name is `Hot set`. Hot Set is Heart + Safety
I will make CPRband. CPR band is necessary for patients with acute cardiac arrest.
In Korea, 60,000 patients have cardiac arrest. But the survival rate is only 4 percent.
So I will make the CPR band easy to raise the survival rate and make it open source.

Hot Set Function

1. Announcing Patients to Nearby People
2. Automatically contact your family
3. Contact the rescue team
4. Manage your heart constantly
5. When the public wears it, it will tell you the accuracy when doing CPR



-The appearance of the hot set I painted-


Senor and Cording

I used Neo pixel as output. The acceleration sensor was then used as an input to change the color of the Neopixels
sequentially according to the speed.


Neopixels were used to make the accuracy visible when performing CPR.

Speed data were obtained using acceleration sensors. So, when CPR is performed, the speed intensity indicates accuracy.

I made a coding for the Neo pixel and acceleration sensor.

The library was downloaded using the MPU 6090 as acceleration sensor.

However, there was a problem where sensors of acceleration had high errors and suddenly produced high numbers.

So I made an algorithm to catch the error of the acceleration sensor.
Using the Kalman filter, check the acceleration sensor for error.

Then I added another average filter to calculate the mean of the movements.

I operated the acceleration sensor and the neo-pixels with the arduino.
At first, acceleration sensors had a problem due to high levels of bouncing.
However, the filter holds the value of the acceleration sensor and consequently works well.

Making my CPR board (Electronics)

I decided to make a board that will operate the acceleration sensor and the Neopixels.
So I used the Atmaga 328 with the main parts. So I made my CPR board by referring to Fakit.

Component

Atmega 328
Crystal 8 MHz (resonator) 535-10004-1-1 ND
Capacitor 10. uF
Capacitor 0.1 uFx.2
Capacitor 1. uF
Resistor 10K
Resistor 499 ohm
Blue Led
Button SMD


The data sheet on the atmaga 328 provides information on where the acceleration sensor and the Neo pixel will be located.

Design CPR borad in eaglecad.

I designed it in a boat.

My final PCB design. Available for download below.



A toolpath was created in fabmodules.

I cut a trace with Roland.

Finally, Outline was cut as well.

You should choose components without making any mistakes. If you don't do it well, the board won't work.

I finally completed my CPR board.

I tried my CP Rband. The soldering caused problems and was repaired again. It worked well as a result.

I tried connecting the Neopixels and the acceleration sensor from my CPR board.
It's working too well. I am so happy. I feel like I'm going to cry. It's good !!!

Making watchband (Molding and casting, Lasercutter)

I've been thinking a lot about making a watchband. So I considered two ways. One is to create a molding with a 3D printer and then use Moldstar Fast 16 for casting.
And the other is cutting the leather with a lasercutter to make a leather watchband.


I designed the band through Fusion 360.


Put the leather on the laser cutter and cut it. Make sure to use natural leather and place wood under it.
Becasuse the laser cutter can be affected by the stickiness of leather.

Leather was cut neatly, but the section was burned black.
Speed : 30ms
Power : 60 % (150 w)

3D modeling design through fusion 360.


Then, I called stl file to tinkercad and did mold design.




And I had used a 3D printer in Fablab Seoul with Creatable D3.

It was printed well on the floor.

I completed the mold with a 3D printer.



It was fixed using a clamp because it is not flat when printed on a 3D printer.

And It couldn't make an entrance for silicon because I had a mistake in design.
So I used an electric drill to make an entrance.

Don`t make the hole too large. Make it smaller.

I used clamp it again.

But there is a problem. There was a lot of gap between the 3D printed materials that could leak out silicon.
So I used masking tape to block the gap and left it open at the top.
Because there is a hole for air to come out as silicon enters.

Silicon was injected through the syringe.

I waited for 2 hours after finishing my work.

Open the finished mouse carefully with a knife.

The casting went well. Using Moldstar 16 Fast, I was able to create a band of smooth.

So I made two bands.

Making watch Appearance (3Dprinting, 3Dmodeling, CNC)

I designed the upper and lower appearannces of the watch as Fusion 360 through Fusion 360.
It is simple to remove as it covers from top to bottom. I made CPRband referring to the appearance of Samsung Galaxy Gear 3.
And I cut it in two ways : 3D printing and CNC wood.


I made a location hole for the Neo pixels, switches and charging modules on top of the appearance.

The base of the appearance is where the cpr board is located. And I designed the band to hold.

And I printed it on the 3D printer.
Layer:1.5mm
Shell : 1.2mm
Infill : 20 %
Support : o
Raft : o
I used 3D printing to create an appearance.


Finally I made my CPR band.

3Dprinting Done !!!

And I cut the 30 mm thick wood using CNC and made the appearance.
RPM : 1000
Feedrate : 100
Endmill:downcut 1F

The appearance of the wood was sanded with sandpaper.

Making My CPR band (Hot Set)


I fixed the Neo pixels inside using acrylic.

And I made a portable CPR band using switches, charging modules and batteries.

I confirmed that it worked. As there are many things that are not good for charging modules, you must inspect them.
And the switch has three pins, so be sure to check.

I finally made the CPR band HOTSET !!

Hotset works well.

I put Hotset on my hands.



I started with a good concept and finished well. I`m so happy. But there is still a lot to be desired.
I want to make the CPR band smaller and have more functions to save many people.
I hope many people will see the idea of this and think a lot about CPR and acute cardiac patient. Thank you.

-Download File-

cording libraries
cprboard desgin
cording source
3Dprinting stl file
3D modeling file
board image