# VFD_clock
Clock with VFD display based on STM32 MCU. Displays time, date and temperature.
As a display i used an old VFD tube IW-18 (IV-18). Device displays time (hours, minutes and seconds), date and temperature. Clock is based on STM32F103C8T6 microcontroller and it was programmed with HAL libraries. To boost voltage to required level I used popular SX1308 step-up IC.To power VFD display filament with alternating current i used L293d H-bridge with single transistor serving as simple NOT gate.
Schematic and PCB were designed using KiCad. You can find schematic in PDF format in PDFs folder of this repository.
Sensors used in the project:
RTC - DS3231 I2C real time clock
DS18B20 - 1-Wire temperature sensor (not utilized in software yet)
DHT11 - digital relative humidity sensor (not utilized in software yet)
VFD_clock-master.zip （99个子文件） 
VFD_clock-master 
.gitattributes 738B HAL_VFD_Clock Drivers CMSIS Include core_armv8mbl.h 94KB core_cm1.h 41KB core_cm0plus.h 48KB cmsis_armcc.h 27KB core_cm0.h 40KB cmsis_version.h 2KB mpu_armv8.h 10KB core_cm4.h 119KB core_sc300.h 106KB cmsis_iccarm.h 27KB core_cm3.h 107KB core_armv8mml.h 162KB mpu_armv7.h 11KB cmsis_gcc.h 59KB core_cm23.h 100KB core_cm7.h 142KB core_sc000.h 45KB core_cm33.h 169KB tz_context.h 3KB cmsis_compiler.h 9KB cmsis_armclang.h 53KB Device ST STM32F1xx Include stm32f1xx.h 7KB stm32f103xb.h 823KB system_stm32f1xx.h 2KB STM32F1xx_HAL_Driver Src stm32f1xx_hal_exti.c 15KB stm32f1xx_hal_i2c.c 235KB stm32f1xx_hal_flash_ex.c 35KB stm32f1xx_hal_dma.c 27KB stm32f1xx_hal_pwr.c 20KB stm32f1xx_hal_tim_ex.c 75KB stm32f1xx_hal_rcc.c 48KB stm32f1xx_hal_tim.c 235KB stm32f1xx_hal_gpio.c 20KB stm32f1xx_hal_rcc_ex.c 29KB stm32f1xx_hal_cortex.c 18KB stm32f1xx_hal_gpio_ex.c 4KB stm32f1xx_hal.c 20KB stm32f1xx_hal_uart.c 107KB stm32f1xx_hal_flash.c 29KB Inc stm32f1xx_hal_flash.h 9KB stm32f1xx_hal_gpio_ex.h 35KB stm32f1xx_hal_pwr.h 11KB stm32f1xx_hal_gpio.h 11KB stm32f1xx_hal_def.h 7KB stm32f1xx_hal_tim.h 118KB Legacy stm32_hal_legacy.h 205KB stm32f1xx_hal_rcc_ex.h 97KB stm32f1xx_hal_uart.h 42KB stm32f1xx_hal_flash_ex.h 35KB stm32f1xx_hal_dma_ex.h 12KB stm32f1xx_hal_rcc.h 65KB stm32f1xx_hal.h 11KB stm32f1xx_hal_i2c.h 34KB stm32f1xx_hal_dma.h 17KB stm32f1xx_hal_cortex.h 17KB stm32f1xx_hal_tim_ex.h 9KB stm32f1xx_hal_exti.h 12KB STM32F103C8TX_FLASH.ld 4KB Core Src DS3231.c 4KB system_stm32f1xx.c 14KB syscalls.c 3KB i2c.c 4KB stm32f1xx_hal_msp.c 2KB dma.c 2KB stm32f1xx_it.c 7KB tim.c 8KB display.c 7KB gpio.c 4KB main.c 11KB usart.c 3KB sysmem.c 3KB Startup startup_stm32f103c8tx.s 10KB Inc tim.h 2KB gpio.h 1KB usart.h 1KB display.h 2KB i2c.h 1KB main.h 4KB DS3231.h 2KB stm32f1xx_hal_conf.h 15KB dma.h 1KB stm32f1xx_it.h 2KB .cproject 25KB HAL_VFD_Clock Debug.launch 7KB HAL_VFD_Clock.ioc 9KB .mxproject 8KB .project 1KB LICENSE 1KB KiCad_VFD_clock_driver VFD_clock_driver.pro 4KB VFD_clock_driver-cache.lib 21KB VFD_clock_driver.sch 52KB VFD_clock_driver.kicad_pcb 674KB .gitignore 758B PDFs 
VFD_clock_driver_schematic.pdf 106KB README.md 1KB readme_assets 
VFD_date.jpg 837KB VFD_driver_PCB_top.jpg 999KB VFD_time.jpg 848KB资源评论
