7 Segment LED Digital Clock with IC MM5314N

7 Segment LED Digital Clock with IC MM5314N

This is the circuit diagram of digital clock based on IC MM5314N. The clock display uses 6 pieces of 7 Segment LED with format HH:MM:SS. The power supply for this circuit already included, so you can connect this circuit directly to the mains. The DC supply is about 5-12V.

Parts List of Digital Clock Circuit:

R1 =           100Kohms

R2 =           47Kohms

R3 =           100Kohms

R4 …..        10 = 2.2Kohms

R11 …..       17 = 10Kohms

R18 …..       24-25-26 = 220 ohmios

R25-26 =     1.2Kohms

C1 =            2200uF 25V

C2 =            100uF 25V

C3 =            18nF 100V

C4-5 =         10nF

D1 =            1N4148

Q1 a Q7 =    BC550

Q8 a Q13 =  BC560

IC1 =           MM5314N ( Discontinue, National Semiconductor)

GR1 =         4X1N4002

T1 =            220V AC/12V 1A

DS1 a DS7 = Display Common Anodo

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