This circuit diagram of digital clock uses six common anode seven segment displays to show the time. It needs neither micro controllers or PIC for it's operation. It's a MM5314 IC driven digital clock operating at 50 Hz or 60 Hz, and 12 or 24 hour display format.It's very suitable for college mini projects.
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Circuit Diagram of 7 Segment Digital Clock : Click to enlarge |
Parts List
- R1: 100Kohms
- R2: 47Kohms
- R3: 100Kohms
- R4---R10: 2.2Kohms
- R11----R17: 10Kohms
- R18----R24-R25-R26: 220 ohms 0W5
- R25-26: 1.2Kohms 0.5W
- C1:2200uF 25V
- C2: 100uF 25V
- C3: 18nF 100V polyester
- C4-C5: 10nF ceramic OR polyester
- Q1---Q7= BC550
- Q8---13= BC560
- IC1= MM5314N
- D1: 1N4148
- GR1= 4X1N4002
- S1---S3 : 1X2 mini switch
- S4---S6 : Push Button normal open
- T1= 220V AC/12V 1A
- DS1....DS7 : 7 Segment Display - Common Anode
For circuit diagram and complete explanation, please Download this document.
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