Mainboard
AssemblyThe brain: a single-chip MCU keeps time from a 32.768 kHz crystal, scans the buttons, multiplexes the display, and runs the alarm logic. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.
Bill of materials for Mainboard
6 top-level lines as of r46459| # | Item / sub-assembly | Part no. | Qty/assy | Ext. qty | Parts | Type |
|---|---|---|---|---|---|---|
| 1 | Bare PCB | pcb-bare | 1× | 1 | · | part |
| 2 | Microcontroller | mcu | 1× | 1 | · | part |
| 3 | RTC Crystal | digital-desk-clock-rtc-crystal | 1× | 1 | · | part |
| 4 | Light Sensor | digital-desk-clock-light-sensor | 1× | 1 | · | part |
| 5 | Temperature Sensor | digital-desk-clock-temp-sensor | 1× | 1 | · | part |
| 6 | SMD Passive (R/C/L) | smd-passives | 1× | 1 | · | part |