Feather Wings - TeensyUser/doc GitHub Wiki

Feather Wings

These feather wings should work with the Teensy -> Feather adapter

Teensy 3.1/3.2 and Feather compatibility

  • The Feather adapter was designed around the Teensy 3.1/3.2 boards;
  • The original feather adapter had an issue in that lipo battery was connected to the real time clock battery (Vbat). This could damage the real-time clock on the Teensy. This was fixed by the revision B board that was released in August 31 2016.

Teensy LC and Feather adapter compatibility

  • The Teensy LC board is the same size as the Teensy 3.2:
  • The DAC (digital to analog converter) pin is in the same place as the Teensy 3.2, though on the Teensy LC, it is A12 instead of A14.
  • The Teensy LC does not have a Vbat connection to power a real time clock. Instead the pin is used to convert the signal of pin 17 (A3) from 3.3v to the VIN voltage level, and it is useful for using it on WS2812B (neopixel) lights. You don't have to connect the pin, but nothing on the feather adapter uses it.

Teensy 3.5/3.6 and Feather adapter compatability

  • The Teensy 3.5 and 3.6 are longer than the 3.1/3.2 boards, and the interior 5 pins (Reset, Program, 3.3, ground, and Vbat are in a different location).
  • This means you need to mount the Teensy either under the feather adapter or up taller so the board is over the LIPO charger at the back of the feather.
  • You will need to use a wire to connect A21 (the first DAC) to the pin where the A14 is on the feather adapter (between the Program pin and pin 13).
  • You will also need a wire to connect the Program pin and where it is on the Teensy 3.2.
  • Instead of the Program pin, you could connect the Reset pin instead.
  • The Vbat and rear 3.3v and ground pins do not need to be connected.

Teensy 4.0 and Feather adapter compatability

  • The Teensy 4.0 is the same shape as the Teensy 3.2, but there are a few differences.
  • The Teensy 4.0 only has the VUSB pin as an interior pin. It doesn't have AREF, A10, and A11.
  • The feather adapter does not bring out A10 and A11, so you don't need to connect them.
  • The feather adapter does bring out AREF. The Teensy 4.0 does not have an adjustable analog reference voltage, so you should connect 3.3v to the AREF pin in the feather adapter.
  • The Teensy 4.0 does not have a DAC (digital to analog converter) that can be used to play mono sounds. This means you cannot use mono sound produced by feather wings like the prop maker.
  • The on/off pin on the Teensy 4.0 is where the DAC pin (A14) is located on the Teensy 3.1/3.2. You will need to verify that any feather wings you use do not use this pin. Or you could just not attach the pin to the feather adapter.

Teensy 4.1 and Feather adapter compatability

  • The Teensy 4.1 has the same issues as the Teensy 4.0 (no AREF pin, no DAC, etc.);
  • Because it is longer than the Teensy 4.0/3.2/LC, it has the same issues as the Teensy 3.5/3.6 in that if you want the Program pin connected, you will need to run a wire to connect it from the Teensy 4.1 to the Feather adapter;
  • You will also need to mount the Teensy either under the feather adapter or up taller so the board is over the LIPO charger at the back of the feather adapter.

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