HiLetgo 5pcs DS3231 High Precision RTC Real Time Clock Module 3.3V/5V for Arduino Raspberry Pi sold2024 big variable teeth (like 6/10TPI)

big variable teeth (like 6/10TPI) is for cutting aluminum

place a layer of Kapton tape over the aluminum bed surface and apply BED WELD on top of the Kapton

for the cotter pins

Yasorn M8 Open Cup Hook Screw Stainless Steel Expansion Heavy Duty Bolts Pack of 5

DesignPad + FreePad

HiLetgo 5pcs DS3231 High Precision RTC Real Time Clock Module 3.3V/5V for Arduino Raspberry Pi sold2024 big variable teeth (like 6/10TPI)HiLetgo 5pcs DS3231 High Precision RTC Real Time Clock Module 3. 3V 5V for Arduino Raspberry Pi Description: The module itself can adapt to 3. 3V and 5V system, no need for level conversion, which is super convenient; Provide continuous timing battery backup; Complete clock calendar function includes second, minute, time, week, date, month, and year, and provide leap year? compensation until 2100;? Low power consumption; Two calendar clock; Reset