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???
03/13/06 16:14
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#112077 - mobike plug
Responding to: ???'s previous message
The tacho is designed to readout the rpm of a mobike. The sensing is taken from the sparkplug line. If i am correct the minimum rpm of a bike is around 500rpm to a maximum of 10000rpm. There will be one pulse per two revolutions or 4 revolutions. So the frequency will be low.

So i decided to go with get the time between two pulses.

If you go for such a precision the readout will become unusable at a higher frequency since it will read differently7 for every display. Motors do not run that stable. I would specify the accuracy in percent.


So i decided to go for lesser accuracy... 10rpm is that do

Nandhu

List of 14 messages in thread
TopicAuthorDate
tachometer "which one is best"            01/01/70 00:00      
   > Which accuracy do you expect?            01/01/70 00:00      
      accuracy            01/01/70 00:00      
         Both are acceptable            01/01/70 00:00      
   Actually, the choice is only related to            01/01/70 00:00      
      mobike plug            01/01/70 00:00      
         shooting for the moon            01/01/70 00:00      
            resolution            01/01/70 00:00      
               Cleaning input signal            01/01/70 00:00      
                  How do you propose to get the signal?            01/01/70 00:00      
                     inductive pickup            01/01/70 00:00      
                  cleaning input signal from the spark plu            01/01/70 00:00      
                     yes, mistype            01/01/70 00:00      
   None of them            01/01/70 00:00      

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