By the way, for the e-ink project I just linked in the other comment I ended up discovering the RV-3028-C7 RTC module. Idle power draw 45 nA at 3.3V instead of 110 μA for the DS3231 for similar functionality and ±1 ppm accuracy with an internally sealed oscillator. Awesome for battery-powered stuff and cheaper at low qty on Digikey.
I hope more of those little DIY/maker breakout boards adopt it. Pimoroni sells one. The one in my project is a free sample dev board that Micro Crystal sent me on request - which I guess is working out for them considering I just shared their product with you all.
I hope more of those little DIY/maker breakout boards adopt it. Pimoroni sells one. The one in my project is a free sample dev board that Micro Crystal sent me on request - which I guess is working out for them considering I just shared their product with you all.