Tag Archives: Feather 32U4 Adalogger

Adafruit debuts the Feather 32U4 Adalogger

The Feather 32U4 Adalogger is Adafruit’s take on an all-in-one datalogger.

Remember when we brought you a first-ever look at Adafruit’s new lineup of Feather boards back at World Maker Faire? Well, as Ladyada herself promised, the new dev boards are thin, light and ready to let your imagination fly! Following the recent debut of the Feather 32U4 Basic Protothe team has unveiled the latest addition to its family: the Feather 32U4 Adalogger


The Adalogger is Adafruit’s take on an all-in-one datalogger (or data-reader) with USB, battery charging and a microSD card holder. As it name would suggest, the board is based on an ATmega32U4 clocked at 8MHz and at 3.3V logic, with 32K of Flash and 2K of RAM. And since it features native USB support, not only does it boast built-in USB-to-Serial programming and debugging capabilities, it can also act like a mouse, keyboard and MIDI device.

As Adafruit notes, they’ve gone ahed and added a connector for a 3.7V LiPo along with an integrated 100mA battery charger. However, the Adalogger can run just fine via microUSB.


“But, if you do have a battery, you can take it on the go, then plug in the USB to recharge,” the team writes. “The Feather will automatically switch over to USB power when its available. We also tied the battery through a divider to an analog pin, so you can measure and monitor the battery voltage to detect when you need a recharge.”

Measuring only 2.0″ x 0.9″ x 0.28” without headers soldered, the Feather weighs roughly five grams. The board has plenty of pins (20 GPIO), with eight PWM and 10 analog inputs, four mounting holes, a power/enable pin and a reset button. Capitalizing on the little space that was left over, the Adalogger packs microSD slot and a green LED.


The 32U4 Adalogger comes fully assembled and tested, with a USB bootloader that lets you quickly use it with the Arduino IDE. Sound like the $21 board for you? Head over to its official page. Meanwhile, stay tuned as Adafruit continues to reveal the newest members of the Feather family here.