Update README.md

bareboat-necessities · Nov 29, 2024 · 7b53f0f · 7b53f0f
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@@ -41,7 +41,13 @@ Then the frequency of alternator signal can be up to
 
 5000 * N / 60   Hz
 
+Let's say there are 12 poles on alternator N = 12.
 
+5000 * 12 / 60 = 1000 Hz
+
+1/1000Hz = 0.001 sec = 1 millisecond
+
+So debouncing time of 100 microseconds should be ok.
 
 On esp32 there has to be added some synchronization code on the critical section of interrupts (pulses) counting.