In Part 7 of the video series, I showcase the electronics and layout thereof in the top and bottom enclosure, the gesture sensor connected in the lid and menu operation. The calibration process is shown and the year operation once the calibration is completed.
The B200 is a base-200, fully programmable electro-mechanical clock featuring 5 complications. The clock is designed to display the passage of time over the course of a day with complications designed for the moon phase, year, century, ambient temperature and barometric air pressure, using a disc assembly moving vertically on the lead screw. The disc assembly features a unique magnetic clutch design using repurposed mechanical hard drive platters. The lead screw pitch is 2 mm per turn (rotation), providing a base of 200 for the clock design from which its name is derived - the B200. The clock takes inspiration from various sources, including the 10,000 year clock currently under construction (ua-cam.com/video/zeDW0PPZ-_c/v-deo.htmlsi=y1Q6FUs-bjDdVWdE).
A total of 200 steps defines the full travel path at increments of 2 mm per step or shaft rotation for a total distance of 400 mm. The stepper motor can be controlled at 200 steps per rotation of the shaft (1.8 degrees per step). Micro-stepping can increase this resolution further provided the microcontroller supports this functionality. With both pins of the stepper driver connected to VIO, 1/16 steps can be achieved for an effective 3,200 steps per shaft rotation. Over the length of the lead screw, this is equal to 640,000 microsteps of travel.
Two LED rings, each consisting of 24 equidistant RGB NeoPixels, are installed within a groove on the enclosures. The light patterns are mirrored to a unified visual pattern. The brightness of the LEDs can be controlled using a potentiometer with the back LEDs turned on or off in the menu.
00:00 - Introduction
00:34 - Bottom cover plate
01:06 - Bottom enclosure electronics
03:33 - Clock body
04:30 - Lid cover
04:50 - Top enclosure electronics
05:35 - Temperature sensor
06:17 - Calibration process
09:00 - Display/menu
09:20 - Year mode operation
09:48 - Battery power mode
10:15 - Outro