Arduino-VFD clock

       Because I like the color of VFD fluorescence, I made a VFD clock in 2020. Later, due to a sudden attack of laziness, the program only realized the basic functions and was shelved... and then forgotten.

       Now when I was looking through the folder, I saw this VDF clock project and wanted to share it with everyone. I hope you like it.

The main technical parameters:

Main control: Arduino mini pro main control (328PAU), this one can be removed from the Arduino board and comes with its own bootload;

VFD screen: Futaba 8-bit dot matrix VFD display module. This can be purchased from Taobao. You can buy a bare screen and make your own VFD driver board.

Onboard sensor: photoresistor, adjusts the brightness of the VFD screen according to changes in ambient light, making it brighter during the day and darker at night;

                      Temperature and humidity sensor AM2302, detects indoor temperature and humidity;

                      Clock chip DS3231, accurate travel time;

                      Buzzer, used as reminder sound and alarm clock;

                      Dial switch, used as power on and control keys;

Power supply: 500mAh 3.7V lithium-ion battery and Type-C power supply. There is a dual power switching circuit. Powering Type-C will automatically light up. Battery power can only keep the screen on for about 2-3 hours;

Burning: Onboard CH340C, you can directly use Type-C to burn programs and serial port printing;

Program update...

        Currently, only basic functions have been implemented in the program, such as displaying time and date, displaying temperature and humidity, etc., and will be added in the future:

1. Use the dial switch to set the time and date;

    (The program in the attachment can only modify the time through the serial port)

2. Alarm clock setting;

3. Automatic sleep;

4. Fancy interface...

Hey, I'm usually a bit lazy. If everyone likes this clock, I will update these functions.

Appreciation of renderings

Figure 1 Front

Figure 2 Top view

Figure 3 Back

Figure 4 Back

PCB proofing

Figure 5 PDC top surface

Figure 6 PCB bottom surface