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j4y-boi/floppy-disc-keychain

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847b16a · · Oct 20, 2025

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💾 The Floppy Disc Keychain 💾

if cant see the emojis you should probably update frfr

What is it?

It's, well, a keychain in the shape of a floppy disc. It has very awesome amazing functions like:

  • Being a keychain
  • Being a PCB
  • Being a PCB (with NFC :0)
  • Being NOT waterproof (unless you or I make a case)

If you'd like to see the process of making this thing I recommend you check out the journal.

Technical specifications and other stuff

Size: 25mm x 25mm

BOM:

ID Name Designator Quantity Manufacturer Part Manufacturer Price (USD)
1 220nF C1 1 CL10B224KA8NNNC SAMSUNG(三星) 0.006
2 0805G (Green) LED1 1 KT-0805G KENTO 0.011
3 47Ω R1 1 0603WAF470JT5E UNI-ROYAL(厚声) 0.001
4 EVPAA602W SW1 1 EVPAA602W PANASONIC(松下) 0.214
5 NT3H2111W0FHKH U1 1 NT3H2111W0FHKH NXP(恩智浦) 0.695

This is just for the PCB part, if you want to actually also make the keychain part, you'll need some keychain split rings, a keyring, and (if necessary, a normal pair of pliers should do fine) some keychain pliers.

Images

(I also sincerely apologize for the low quality images, but I'll throw my laptop off of the second floor if I have to go through EasyEDA to KiCad conversion.)

image

The schematic of the PCB

image image

Front and backside of the PCB.