A Feather board without ambition is a Feather board without FeatherWings! This is the DS3231 Precision RTC FeatherWing: it adds an extremely accurate I2C-integrated Real Time Clock (RTC) with a Temperature Compensated Crystal Oscillator (TCXO) to any Feather main board. This RTC is the most precise you can get in a small, low power package. Using Adafruit's Feather Stacking Headers or Feather Female Headers you can connect a FeatherWing on top of your Feather board and let the board take flight!
Most RTCs use an external 32kHz timing crystal that is used to keep time with low current draw. And that's all well and good, but those crystals have slight drift, particularly when the temperature changes (the temperature changes the oscillation frequency very very very slightly but it does add up!) This RTC is in a beefy package because the crystal is inside the chip! And right next to the integrated crystal is a temperature sensor. That sensor compensates for the frequency changes by adding or removing clock ticks so that the timekeeping stays on schedule.
With a CR1220 12mm coin cell plugged into the top of the FeatherWing, you can get years of precision timekeeping, even when main power is lost. Great for datalogging and clocks, or anything where you need to really know the time.
A CR1220 coin cell is required to use the battery-backup capabilities! Adafruit don't include one by default, to make shipping easier for those abroad, but we do stock them so pick one up or use any CR1220 you have handy.
- 50.8mm x 22.9mm x 1.6mm / 2" x 0.9" x 0.06"
- Weight: 4.8g
- Datasheet, schematic, EagleCAD PCB files, and Fritzing available in the product tutorial
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Documentation and Resources:
- CircuitPython vs MicroPython: Key Differences
Have you ever wanted to program your microcontrollers with Python instead of Arduino? MicroPython and CircuitPython bring the ease of Python to microcontrollers by adding hardware support! In MicroPython, Python is largely unchanged other than the ad...
- The Maker Revolution
The Maker Revolution celebrates the creation of new devices and the modification of existing ones - the transition from a consumer buying goods to eventually having a major part in their creation. The Maker Revolution places strong emphasis on free (...
- Hello World with the OLED FeatherWing
The OLED Featherwing by Adafruit is a particularly interesting Wing; it gives you a 128x32 monochrome OLED display right on top of your feather board. There's also three buttons to use that are internally connected to your MCU and accessible via the ...
- Wi-Fly with Feather Boards
I’ll level with you; the idea of microcontrollers and wireless networks was a little daunting to me initially. How on earth was I going to connect and control it with Wi-Fi?! But when I eventually I waded into the world of networking microcontr...
- Wings of the Feather
The Feather boards are the brains of your project, we took a closer look at the different models in our Birds of Feather article, check that out first (especially if you have no idea what the difference is between a feather and a wing). You can plug ...
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