uDuino (microDuino)

[last update: 2022-06-06]
(link to:) 32u4 pinMapping per arduino.cc

Arduino boards
-----
Note: This board is NOT a "MicroDuino", which is a registered name for a STEM product.
This board is the "µduino".

This board is The smallest full-featured Arduino available.

"Full-featured" means having the same number of analog and digital I/O as a Uno.
However there is NO EEPROM.
and NO (addressable) onboard LED.
    The LED that is on the board is only a power-on indicator.

(link to:) Crowd Supply page

• Specifications:
  ATMEGA32U4 microcontroller
  6x Analog I/O ports
  14x Digital I/O ports (including Rx/Tx)
  Status LED:
        blue LED comes on when power is applied to the board
        does not seem to be programmable, at least not via the usual default of DO-13
  Dual-power modes for 3.3 V and 5 V operation (V_in accepts up to 16 V)
  1x Power output (3.3 V or 5 V depending on what mode is selected)
      (but I can't find what pin it's available on...)
  3x Ground ports
  1x Analog reference voltage port
  Reset button:
        Almost impossible to access
        due to 90-deg header directly above it.
        It was possible, however, by carefully using an exacto razor blade.
  16 MHz precision crystal oscillator
  MicroUSB port for easy programming and prototyping
  Preloaded with Arduino Leonardo bootloader

  
  Interrupt pins:
        Inspection of the pinout diagram
        suggests that D0 - D3, & D7 (5 pins) can be used for external interrupts.

  
  Designed to operate with either 3.3 V or 5 V power, selected with a jumper on the board
      (in the corner of the board, near the reset button).
  ------------------------------------------------------------

• 2022-02-25:
  Still available from Crowd Supply, about $10 ea.
  received 2
  model#: CS-UDUINO-01
  ECCN: EAR99

  I can see it will be a challenge/learning-curve to solder onto
  the 1.27mm pitch pins.

• 2022-02-28:
  First attempt to connect to IDE:
  • Tools -> board -> Leonardo
  • Tools -> port
    select the one available
  • uploaded nominal program
    with nothing more than printPreamble to serial monitor
    After adding while(!Serial); to wait for serial connection,
    It works!

  ------------------------------------------------------------

• Projects: ...
  • UD-01 set up to test in a variety of circuits:
    Red - +5v
    Yel - A4
    Wht - A5
    Blu - D6
    Grn - Gnd
    Blk - A0
    Wht - D3

.

.

.

eof