Hello,
I am trying to construct a tachometer to show the RPM of a rotating shaft. The shaft rotates about 20-120 times a minute. I was thinking of using this sensor ( http://www.dartcontrols.com/manuals/OPUHU.pdf ) and this basic design ( http://www.site.uottawa.ca/~rhabash/Tachometer.pdf ).
I understand how to hookup the 555 into an astable circuit with a period T. How do I wire this into a one-shot (74123?) in order to get the desired signals?
Also, I understand how to get the decade counters to count the number of pulses during the period T (from the 555) but how do you hook these to latches in order for the 7 segment LEDs to display the previous count?
Thanks for any help.
I am trying to construct a tachometer to show the RPM of a rotating shaft. The shaft rotates about 20-120 times a minute. I was thinking of using this sensor ( http://www.dartcontrols.com/manuals/OPUHU.pdf ) and this basic design ( http://www.site.uottawa.ca/~rhabash/Tachometer.pdf ).
I understand how to hookup the 555 into an astable circuit with a period T. How do I wire this into a one-shot (74123?) in order to get the desired signals?
Also, I understand how to get the decade counters to count the number of pulses during the period T (from the 555) but how do you hook these to latches in order for the 7 segment LEDs to display the previous count?
Thanks for any help.