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Digital display electronic clock circuit

2016-12-12 01:54  
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Digital display electronic clock circuit
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 wrong with the circuit, it has the function of all-bit flashing display. The LDD640R can use the 5V AC half wave rectification method to supply the power, in the full light state, the current is less than 200mA.