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Sea-Picro EXT V1.0 (16MB/128Mb Flash Memory) - RP2040-based pro micro drop-in replacement
Sea-Picro EXT V1.0 (16MB/128Mb Flash Memory) - RP2040-based pro micro drop-in replacement
Sea-Picro EXT V1.0 (16MB/128Mb Flash Memory) - RP2040-based pro micro drop-in replacement
Sea-Picro EXT V1.0 (16MB/128Mb Flash Memory) - RP2040-based pro micro drop-in replacement
Sea-Picro EXT V1.0 (16MB/128Mb Flash Memory) - RP2040-based pro micro drop-in replacement
Sea-Picro EXT V1.0 (16MB/128Mb Flash Memory) - RP2040-based pro micro drop-in replacement
Sea-Picro EXT V1.0 (16MB/128Mb Flash Memory) - RP2040-based pro micro drop-in replacement
Sea-Picro EXT V1.0 (16MB/128Mb Flash Memory) – RP2040-based pro micro drop-in replacement
USD $12.00 USD $9.00 Add to cart
Sale!

Sea-Picro EXT V1.0 (16MB/128Mb Flash Memory) – RP2040-based pro micro drop-in replacement

USD $9.00

-25%

In stock

Free worldwide shipping on orders over $40

Sea-Picro EXT is a ProMicro-shaped breakout board with RP2040. The Sea-Picro is designed by joshajohnson. The open source hardware project can be found at the GitHub repo https://github.com/joshajohnson/sea-picro.

Features

  • No on-board LEDs
    • The version in this shop does not come with the power LED. It has been removed intentionally.
  • Non-castellated
    • To keep this affordable, this is the 1.0-ext instead of 1.0-ext-castellated.
  • 16MB (128Mb) Flash Memory (W25Q128JV)
    • You can enable a lot of features and layers. Never worry about the firmware size limit.
    • Comparing to the ATmega32U4-based boards that come with 32KB, there is 500x more memory.
    • 16MB is the highest amount of memory supported by RP2040 via dedicated QSPI bus. Other RP2040-based boards might come with less flash memory, depending on the off-chip memory used.
    • If you use CircuitPython, some flash memory will be used by CircuitPython.
  • RP2040 MCU
  • Built in VBUS sense circuit
    • For split keyboards, you can disable the SPLIT_USB_DETECT to avoid problems including keyboard wakeup problems. The VBUS sense (VBUS_DETECT) circuit is connected at GP19. It’s recommended to use `#define USB_VBUS_PIN GP19`.
  • A single button for reset/bootloader mode
    • For other boards, it is challenging to use two buttons to enter the bootloader. With this circuit, resetting the board, or entering the bootloader mode becomes easier.
  • Pin compatible with most pro micro boards
    • Legacy boards that connect RAW and VCC pins are not compatible
    • RGB LEDs (such as WS2812B-5050, SK6812mini-e) usually require a power supply voltage above 3.5V or 3.7V. Although some people power RGB LEDs at 3.3V, this is out-of-specification.
  • Mid-mount USB Type-C
    • It is stronger than the fragile USB Micro B connectors, commonly found in Pro Micro clones.
    • It allows lower profile keyboard builds.
    • Both A-to-C, and C-to-C data cables are supported.
    • You can plug in the USB Type-C cable either way with the flippable connectors.
  • IO pinout compatible
  • 5V logic level shifter/converter
    • There is an extra pin to provide data signal with a proper voltage level for communicating with RGB LEDs with built-in ICs.
  • More pins
    • Additional D+ and D- pins at the top
    • Additional 5 GPIOs at the bottom

Important Notes

  • You should flash a firmware before soldering. Improper soldering can make this board non-functional.
  • Pin headers are sold separately.
  • This is a hardware product for hobbyists. For advanced features or firmware-related questions, please visit other community sites or Discord channels.
  • Charging-only USB cables do not provide data communications. You should use A-to-C, or C-to-C USB data cables.

 

 

 

 

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