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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!
  • 2026-09-31*
    • Introduction v4r1 version
      • Completely reworked board!
      • Moved to 6 layer PCB
      • New DC-DC converter design
      • New QEXP port
        • Comes with included cable to female dupont for wiring up accessories
      • Change Relay port and circuit
        • Uses load-switch now, still 5V trigger out
        • Smaller port with included pigtail cable
      • Reworked level-shifters with ESD and OverVoltage protection
        • No more resistor switcher, adapted circuit to perform well with both
        • Similar to “33R” performance
      • Added “top board” extension header
        • New top boards will be able to provide additional future functionality
          • Think doubled port outputs, integrated Diff-Solo ports, Diff-Adv ports, DMX in/out, etc.
          • Fully stacking and stacking power compatible
      • Changed I2C port
        • Now a Stemma QT/JST SM 1.0mm port
      • Changed Ethernet socket
        • Lip points up now
      • Removed Ethernet power jumper
        • Jumper for SDcard remains (to turn off power to SDcard reader and pull-ups)
      • Added onboard digital PDM microphone
        • Added jumper to disable electrically
      • Changed GPIO layout
        • Allows LED1-8 to work together with I2C and Digital microphone