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Fu**g cheap Flipper Zero FcFz

Forced Open source HardWare of Flipper zero, suitable as hobby DIY project

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Hi, I'm Nucleus Dark To the world that punished me by denying me the life I was born for—all for the crime of simply living it for myself instead of for you—this is my middle finger. LOW-PRICE, HOBBYIST, DIY-FEASIBLE, FORCED-OPEN-SOURCE HARDWARE OF THE FLIPPER ZERO I would like to thanks PCB Way for their awesome PCB manufacturing service, and for the sponsoring of this project. I highly recommend PCBWay. complete readme with bot not only technological readme: https://github.com/GthiN89/FuckingCheapFlipperZero-DIY-Flipper-zero-The-real-on

So.... NFC work now.... This mean im 125KHZ Rfid from complete F0


THE BUILD PRICE IS ARROUND 20 EURO NOW, and all what is left is 125khz RFID. Sure, i will need to learn some analog, but should be easy, right?


I just dont like abstraction...
anyway...
Now, it seems to transmit on right frequncy, BUT, i need top calibrate my cheeap RTL-SDR, to be really sure...




SubGhz tests and optimization.
Today, s decided to test the SubGhz module on my (currently 15 USD) DIY Flipper zero.
As you can see, i find out, that transmision is happening on 433.88, instead of 433.92, and i believe, that it is caused by crysal on cheap chinesse module, so i decided to to find a way how to fix this in the FW.

Transmision on SDR

mcsde_WhatsApp Image 2025-06-22 at 19.17.19.jpg

New desing

JPEG Image - 277.78 kB - 06/22/2025 at 17:28

Preview

eqmqg_WhatsApp Image 2025-06-22 at 19.17.19.jpg

New desing

JPEG Image - 284.08 kB - 06/22/2025 at 17:28

Preview

WhatsApp Image 2025-06-22 at 19.17.19.jpg

New desing

JPEG Image - 245.85 kB - 06/22/2025 at 17:28

Preview

  • 1 × STM32WB55CGU6 similar, almost same MCU as Flipper use, but MUCH cheaper
  • 1 × TI CC1101 classic
  • 1 × 128x64 SPI LCD using ST7565R controller
  • 1 × Electhouse ST25R3916 NFC Reader Module I believe, its most suitable for me.
  • 1 × SN74HC165N HW serialization of the buttons to save on GPIOS

View all 6 components

  • Lazy NFC drivers fixed

    GthiN11/13/2025 at 13:25 0 comments

    After fixing the drivers, NFC do work

  • BTNS SN74HC165N

    GthiN09/16/2025 at 07:24 0 comments


    Finally, serialized buttons work as intended. just NFC and external SPI to go...

  • New desing approach

    GthiN06/22/2025 at 17:24 0 comments

    I think I need a new design that:

    • Is not an imitation of the official one.

    • References traditional codegrabbers.

    • Is practical, simple, and suitable both for quick prototyping and production.

    • Is easily modifiable.

    • Is compact, “basic”, yet cool and cute.
      In the end, I decided to go with the traditional “Game Boy” style, which meets all the above + is an absolute classic belonging to the same traditional line as, for example, the “Nokia 3310” or “TV remote” design.
      Opinions??????

  • Update

    GthiN05/24/2025 at 05:31 0 comments

    Quick Update:

    Moved to Momentum 10.

    Despide receiving the module NFC still does not work

  • SubGhz Seems to work.

    GthiN05/04/2025 at 23:30 0 comments

    And is seems to work just perfect, Inluding Keeloq.

  • I just dont like abstraction

    GthiN05/03/2025 at 20:40 0 comments

    I just dont like abstraction... anyway... Now, it seems to transmit on right frequncy, BUT, i need top calibrate my cheeap RTL-SDR, to be really sure...

View all 6 project logs

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