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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
higher gear ratios of the non-HP motors might work if you want lower current draw
They are easy to use and work with Arduino
use Touch pHAT to cancel or snooze the alarm
LiPo SHIM pinout
HiFiBerry DAC2 HD epd This is the DS3231 PrecisionThis is our high end DAC for the Raspberry Pi. It can be simply plugged onto your Raspberry Pi, without any soldering. It can be extended by an additional DSP module. Compatible with: Raspberry Pi A+ B+ 2B 3B 3B+ 4B Zero Datasheet Additional information Weight 55 g Dimensions 9. 5 7. 5 2. 5 cm
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