DAILYFLOGGER
I'm crushing your head !!
- Joined
- Jul 22, 2001
Could someone please help me spec a couple of componets I need for an ultra accurate clock timing pulse circuit that I'm tring to build?
My father has a slave clock from a factory that needs a contact closure once every 60.000 seconds. I'm imagining a IC circuit for this task.
I already have and have played with a 120 to 7 VAC trans., a 7805, some caps, a 5V radioshack relay and some diodes.
I roughed in (real rough!) the circuit using two 555 timers. Good learning experince fro me but otherwise a waste of time.
What I think is required is a oscillator section (crystal?? quartz??) for the accuracy. In combination with a frequency divider/counter? I'll still want a 555 for pulse length adjustability.
If someone could please tell me if my concept is good and if so spec the oscillator section (crystal?? quartz??) and frequency divider/counter parts I would be very gratefull.
Thanks in advance. Bruce
My father has a slave clock from a factory that needs a contact closure once every 60.000 seconds. I'm imagining a IC circuit for this task.
I already have and have played with a 120 to 7 VAC trans., a 7805, some caps, a 5V radioshack relay and some diodes.
I roughed in (real rough!) the circuit using two 555 timers. Good learning experince fro me but otherwise a waste of time.
What I think is required is a oscillator section (crystal?? quartz??) for the accuracy. In combination with a frequency divider/counter? I'll still want a 555 for pulse length adjustability.
If someone could please tell me if my concept is good and if so spec the oscillator section (crystal?? quartz??) and frequency divider/counter parts I would be very gratefull.
Thanks in advance. Bruce