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A digital clock standard 60HZ time-based circuit

2017-01-07 12:06  
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A digital clock standard 60HZ time-based circuit
CD4060 is a 14-bit binary serial counter / oscillator frequency divider. Oscillator and External crystal R1, C1, C2 constitute the 30720Hz oscillator circuit; another part is the 14 frequency divider. Use the former 9 levels divider, and its frequency is 512.The standard 60Hz signal obtained by the oscillator output through the frequency division output from the Q9, as the standard base signal of the digital clock circuit. BG1, BG2 constitute a 60Hz signal synchro switch, Under the effect of 60Hz signal, BG1, BG2 conduct alternately, BG1 collector and BG2 emitter respectively connected todouble-negative-type display 1 and and 2 feets, ensure that the double-negative-type display works properly.