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Hardware revisions

Talko 1.0 (October 2014)

  • initial release

Talko 1.1 (June 2015)

  • higher resistors values for the LED (too bright)
  • removed the RC filter : I prefer the metallic sound it produces without the RC audio filter
  • swap Pitch & Speed pots as suggested
  • fixed the LED ground connection missing

Talko 1.2 (May 2016)

  • fixed a missing via
  • Audio output protected against mistake of over or under voltage by clipping from 0 to +5V
  • Rotary encoder for instant Bank change via interrupts
  • Encoder's button to simulate gate signal going HIGH and make the module speak when pressed
  • Mode selection now a 3 positions switch
  • Break out 4 ATmega328p free pins for hacking (included A4 A5 for I2C bus)
  • Proper orientation of potentiomers

Software revisions

Please note that hardware version need specific firmware version. They are not cross-compatible

More info here : http://www.polaxis.be/talko/
License: CC-BY-SA