Adafruit PyRuler - Engineer Reference Ruler with CircuitPython POL_6V High-Power (HP) Micro Metal Gearmotors Many "cheap" DS3231 RTC boards

Many "cheap" DS3231 RTC boards do not use genuine Maxim DS3231's - you'll get a non-calibrated RTC which does not maintain the timekeeping quality that is specified

All other GPIOs are unused and you can still share the I2C pins with sensors

so the Arduino's traditional wired USB connection can still be used while the shield is connected

Grove - Sunlight Sensor includes an on-bard Grove connector

-ing started by these awesome projects that pioneered the way to make and share games

Adafruit PyRuler - Engineer Reference Ruler with CircuitPython POL_6V High-Power (HP) Micro Metal Gearmotors Many "cheap" DS3231 RTC boardsThe first time you soldered up a surface mount component you may have been surprised "these are really small parts!" and there's a dozen of different names too! QFN, TDFN, SOIC, SOP, J Lead, what do they mean and how can you tell how big they are? Now you can have a reference board at your fingertips with this snazzy PCB reference ruler. Measuring approx 1" x 6" standard thickness FR4, this gold plated ruler has the most common component packages