Building Cyton questions: 4 layer required, BOM vs schematic

siddhantsiddhant Pilani
edited February 2019 in Build-it-yourself
I had a few doubts regarding the cyton board PCB. I hope you could help me with those. Firstly, is the PCB a control impedance board or a normal 4-layered FR4 PCB will do. Secondly, does the PCB need to be 4-layered or will it work even if it is only single or double sided(Is it something related to noise reduction?). Thirdly, the BOM lists some other parts and the schematics list some other for a few components such as U5, R10,R11 and D9. Which one to be finally consulted the BOM one or the schematic one.

Please help me with these as quickly as possible, as it is for my undergrad project and the deadlines are nearing.

Comments

  • wjcroftwjcroft Mount Shasta, CA
    Siddhant, hi.

    Use the right column "Google Advanced Search" button, there have been other posts in this category with BOM / supplier clarifications.

    The board needs to follow the layouts given. Yes, power and ground planes are important for signal isolation, digital vs analog sections, etc.

    You can click on a forum members name, such as @siddhant, and then use the Message button to send a Private Message.

    Please note, the RFduinos used on mainboard and dongle are at EOL. You likely will not find them at distributors. See some other posts in this categories for users who have been successful in modifying the firmware to use other radio modules, such as the ESP series. In the case of the ESP32, it can do all radio formats -- including Bluetooth SPP Serial Port Protocol, which may be sufficient to eliminate the need for the dongle.

    Regards,

    William

  • laeeq24laeeq24 pakistan
    edited March 2019
    Hey;
    I made a pcb for ads1299 with pic32, using minimum distance 5 mil and minimum trace width is 10 mil. I have gound planes and I separated ground planes for digital ground and analog ground. Now I want to develop my PCB so should I develop as Impedance control PCB or not? 
    Regards
  • wjcroftwjcroft Mount Shasta, CA
    @laeeq24, hi. I merged your question into this existing thread.

    No I don't believe "controlled impedance" PCB is used. Those are only for high frequency (RF / microwave) type circuit traces,


    The sections on the Cyton board are only carrying normal digital and low frequency analog signals.

    Regards,

    William

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