Digital display electronic clock circuit

This electronic clock comprises the LM8365 and the LDD640R displays. The LM8365 can show the hour/minute and month/day. Users can set two alarm outputs, AD1 and AD2, by pressing either the 12h or 24h button. The operating voltage range is -21V to -6.5V, and it directly drives the LED display. This circuit includes a subtraction timing function, which activates when there is a power interruption or other issues.

The electronic clock circuit utilizes the LM8365 integrated circuit, which serves as the primary timekeeping and display controller. The LM8365 is capable of handling time formats in both 12-hour and 24-hour modes, allowing users to select their preferred display method. The clock can also present date information, including the month and day, enhancing its functionality as a complete time and date display unit.

The LDD640R display serves as the visual output for the clock, providing clear and bright LED indications of the current time and date. The LM8365's capability to directly drive the LDD640R ensures efficient power usage while maintaining visibility. The circuit operates within a voltage range of -21V to -6.5V, which is crucial for compatibility with various power supply configurations.

Alarm functionalities are integrated into the design, with two independent alarm outputs (AD1 and AD2) that can be set according to user preference. The alarms can be activated or deactivated based on the selected time format, and users can easily manage these settings through dedicated control buttons.

The subtraction timing function is a notable feature of this clock circuit. It allows for timing adjustments that can be particularly useful in scenarios where precise timekeeping is required, such as during power outages or other interruptions. This function ensures that the clock can maintain accurate time even when external conditions vary, thereby enhancing reliability.

In summary, this electronic clock circuit design effectively combines timekeeping, date display, and alarm functionalities into a compact and efficient system, making it suitable for various applications where accurate time management is essential.This electronic clock is composed of the LM8365 and the LDD640R displayers. The LM8365 can display the hour/minute and month/day.etc; you can set two alarm ouptuts AD1 and AD2 by pressing 12h or 24h; VDD=-21 to -6.5V, it directly drives the LED displaying; this circuit has the function of subtraction timing; when the power cuts off or there is something.. 🔗 External reference