QuinLED-Dig-Octa System
Brainboard-32-8L
Revision History

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• 2022-11-05  –  Release of v1r1
• 2024-06-01 – Version v1r2 escaped into the wild
  • This version was an internal intermediate release but it escaped into the wild when some files got swapped! This version was a pre-lude to the true v2 brainboard which already had some of the changes but not all of them.
    • At least one batch of these had broken onboard temperature sensors!
• 2024-10-01 – Version v2r2 official release!
  • Changed to 16MB version of ESP32 WROOM module
    • More space for large compiles of software
  • Full “redesign”
    • Redid all internal tracks from scratch
      • All terminals stay in the same position
      • Optimized track layout especially for LED channels
  • Redid DC-DC circuit
    • • Changed to dual-coil inductor
  • Removed Temperature sensor
    • • Replaced with Socket (plug-in mode available in the future)
      • Also removed I2C Pull-Up resistors
        • This means that the SDA and SCL* port can now be used for other purposes if so desired
          • SCL is still shared with LED8
  • Changed jumpers to 1.27mm variant
    • • For Ethernet and SDcard power
  • Added SDcard power jumper
    • • Allows for depowering the SDcard section of the board including all connected pull-up resistors
        • Frees up 3x GPIO for other purposes if so desired
  • Added 2.54mm header pins
    • • Uses GPIOs of SDcard slot
      • Makes available
        • 3v3 (SDcard, even when disabled)
        • GND
        • 3x GPIO
          • With no hardware pull-up/down when SDcard jumper is removed
    • Works with INMP441 digital microphone board now!