Tomu [Discontinued] _ARD_SHIELD_GPSGSM The Real Time Clock uses

The Real Time Clock uses the DS1307 RTC real time clock and a CR2032 battery to maintain the date and time when the main system power is not available

Dimensions: 48

25x 560ohm 5% Resistors

fractional step DDA running at 50 Khz with very low jitter (<<1uSec)

The unique specs for the 3

Tomu [Discontinued] _ARD_SHIELD_GPSGSM The Real Time Clock usesOnly 13mm long, Tomu really puts the micro in microprocessor. It's fully open source development board with the silabs Gecko EFM32HG309 processor, on a little board that can slot right into your computer or laptop USB A port (USB C users will need an adapter). The board feature two tiny LEDs, and two capacitive touch pads, as well as a native USB bootloader. While it was originally designed for 2 factor authentication, it's great for very tiny USB