Hello PD community,
I am trying to measure the frequency of an anemometer that gives as its values 1's and 0's as it spins. I am using a [select 1] object and an adding scheme to measure how many times the box reads 1 in a given amount of time before I a [metro] bangs 0 to the addition scheme and it starts counting from 0 again.

my problem is that when the number box goes from 0 to 1 it counts to like 8, instead of just 1. and if it is just sitting on 1 and the anemometer is not moving at all, it just keeps counting. maybe this is because there are slight variations in '1' ? i dont know.
I am using an Arduino circuit with PDuino to hook up the anemometer to PD.

any ideas? i have attached my patch to better show what i am talking about.

http://www.pdpatchrepo.info/hurleur/count.pd

since i don't know, how your anemometer really works, it's hard to find out the problem, but it sounds like 0's and 1's repeat sometimes before they change. you could try to connect a [change] object between the inlet and the select object to avoid repetive bangs. i mean, it could be, that the numbers don't appear like 1 0 1 0 1 0 but 1 1 0 1 0 0 1.
further, i don't really understand the usage of the [sig~] and the [samphold~] - you could leave it as a control signal, if you'd feed the out of the second number box in the right inlet of a [f] instead of the [samphold~] and send the metro to the left inlet of the [f] - this should do the same.

thanks, it seems that [change] has done the trick. I had the [sig~] with the [snapshot~] so that I could periodically send the wind speed data out to the rest of the patch instead of having it go out constantly. i know it is a round about way to do that but i havent been able to find an easier way. thanks again for the help.

[metro 1500] [__\
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[ f ]
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