Classification of electronic perpetual calendar

1, static display: under static state, each digital tube is always powered on, and the old data will be updated and displayed only when a new signal is input.

2. Dynamic display: In dynamic state, each digital tube is in power-off state before new data is input. When a new signal is input, the digital tube to be lit can be turned on. In the same way, other digital tubes can be scanned and lit in turn in a short time.

Second, in the time display mode:

1, numbers: date, time, week, solar terms countdown, temperature and other displays are LED digital tubes;

2. Digital and pointer mixed type: date, week, solar terms countdown, temperature and other information are displayed by LED digital tube, and the time part is displayed by pointer.

Third, in appearance:

1, full digital display perpetual calendar: daily information such as date, time, week, solar terms, temperature, etc. is displayed with LED light-emitting digital display without additional information;

2. Electronic calendar with pictures: Daily information such as date, time, week, solar terms, temperature, etc. is displayed digitally by LED, combined with many advanced electronic technologies and modern classic technologies, and equipped with artistic pictures.

Basic requirements for the normal operation of electronic perpetual calendar;

1. working voltage: the perpetual calendar should not stop running within the voltage range of AC (220+33)v or AC (1 10+ 17) V, and the display is normal.

2. Working temperature: The perpetual calendar should not be stopped in the temperature range of-10℃-50℃, and the display is normal.