This project is clock that shows time using three analog meters (with needle) for time and one VFD for date. Main time reference is DCF77 signal attainable in most of Europe.
- Main microcontroller is STM32L051C8T6
- Power supply is implemnted around Analog Device's LTC3558
- DCF77 receive module is EB6180B1COB77K5A1
- VFD, have old one - itron FG95A
- Driver PT6312
- Driver for fillament - LM4871 (alternative for LM9022)
- Inverting regulator - LT1617
- Analog meters are:
- Simpson 60 x 60 mm for Hours
- 85C1-A for Minutes
- 91C4 for Seconds
- Enclosure is wooden box from Alie, 20 x 10 x 6 cm
- Battery: Panasonic 18650B
Corelated to Hardware, Shematic and PCB is designed in KiCad.
For developing purpose we will use STMCubeIDE, because of it's flexibility, configurability and support. Also it provide easy access to RTOS option. We use C programing language.
To implemet firmware in this projet we use FreeRTOS. Main reasone to use RTOS instead programing barebone firmware is contribution implementation, so people have less chance to influence other people work. Great chance to learn something about tasks, semafors, mesage queues and other useful features of RTOS! :)
- Planing to use python to implement app for generating time and dates to be able to test.
Coming when some starting point is achived