January 5, 2023
Description
A small keychain with your own blood type for emergencies. Inside is an NFC chip with further emergency information such as emergency number, whether you are an organ donor, your name and previous illnesses.
You Need:
I can recommend this product mainly to Android users, because the IOS support for NFC is very poor.
Filament Change
Open PrusaSlicer and import the recently created file. And click on the slice button. That can take some time, but that depends on the PC parts and the complexity of your design. A timeline will appear on the right side of the screen. This shows the selected part of the object. Therefore, you can move this little triangles at the bottom and top of the timeline. You move the top triangle until you only see one layer of your design. Now you click on the small + symbol. The program calculates the color switch, and you can see the result after 1 second.
Insert the NFC Chip
You can add the NFC chip on the fly while the 3D printer is working. You have to look for the right time. Take a chair and sit in front of the 3D printer, not to miss the time for inserting. You should only insert the NFC chip in the end because otherwise the hot nozzle could possibly damage your NFC chip and make it unusable.
You can also use the color switch to stop the printer at a specific layer or height and don't switch the filament color.
Program the NFC Chip
For this process, you can use an app or the Arduino with a special module. The App has more prebuild options like emergency information, simple text, URL, contacts, wifi-passwords or also a bitcoin address. With the Arduino, you as the user have to program things that work or search on the internet for something.
NFC App:
DIY Version:
If you like to, check out my other designs too!
License:
Creative Commons — Attribution — Noncommercial
Max Siebenschläfer
