Feather of the Day: Adafruit RP2040 Prop-Maker Feather with I2S Audio Amplifier #Adafruit #Feather #PiDay

The Adafruit Feather ecosystem is so rich with hardware diversity, we wanted to share them, one each day. Today is the Adafruit RP2040 Prop-Maker Feather with I2S Audio Amplifier!

The Adafruit RP2040 Prop-Maker Feather: an all-in-one combination of the Feather RP2040 with a Prop-Maker FeatherWing with a few tweaks based on feedback from expert prop-builders. Perfect for fitting into your next prop build! This Feather will unlock the ‘Imagineer’ inside all of us, with tons of stuff packed in to make sabers & swords, props, toys, mini robots, cosplay pieces, and more.

We looked at hundreds of prop builds, and thought about what would make for a great low-cost (but well-designed) add-on for our Feather boards. Here’s what we came up with:

  • Terminal Block NeoPixel Port – With easy-to-use screw terminals you can quickly connect and disconnect your NeoPixel strips and rings. This port provides high current drive from either the Feather Lipoly or USB port, whichever is higher. A 5V level up-shifter gives you a clean voltage signal to reduce glitchiness no matter what LED chip you’re using. You can also cut power to the entire strip instantly to reduce quiescent power, thanks to a separate control transistor. Works with any and all NeoPixels (SK6812 / WS2812 family)
  • MAX98357 I2S 3 Watt Class D Audio Amplifier – Drive any 4-8Ω speaker, up to 3 Watts, for sound effects. Audio comes out on two of the terminal blocks so you can screw in any wires to a speaker you like – we’re partial to this small 3W speaker or this enclosed style 3W speaker, both come with pre-attached wires. Thanks to the I2S digital inputs, you’ll get excellent audio quality
  • Triple-Axis Accelerometer with Tap Detection – The LIS3DH is our favorite accelerometer, you can use this for detection motion, tilt, or taps. Here’s an example of a lightsaber that makes sounds when swung or hit. We have code for this chip in both Arduino and CircuitPython.
  • Extra Button or Output Pin – One more pin on the terminal screw block can be used for button input or digital output, for activation or a simple LED.
    Servo Connection – Plug any hobby servo with 3 wires into the 0.1″ spaced header, and you can have quick motion control.
  • Low power mode! The power system for the NeoPixels and speaker amplifier can be controlled by a pin to cut power to them, so you have lower power usage when the prop is in sleep or off mode (but can wake up fast by listening to the button press or accelerometer data).
  • At the Feather’s heart is an RP2040 chip, clocked at 133 MHz and at 3.3V logic, the same one used in the Raspberry Pi Pico. This chip has a whopping 8 MB of onboard QSPI FLASH and 264K of RAM! There’s even a STEMMA QT connector for plug-and-play of I2C devices.


The Adafruit RP2040 Prop-Maker Feather Guide provides all the details and use examples.


Would you like to see this Feather in action? Check out the project below:

In stock! You can buy the Adafruit RP2040 Prop-Maker Feather with I2S Audio Amplifier in the Adafruit shop.

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