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- int entrada = A0;
- int delta1;
- int delta2;
- int periodo;
- long frequencia;
- void setup()
- {
- Serial.begin(9600);
- pinMode(entrada, INPUT);
- }
- void loop()
- {
- int tensao = analogRead(entrada);
- delta1 = 0;
- delta2 = millis();
- if (tensao = 0);
- {
- periodo=(delta2-delta1);
- frequencia=2/periodo;
- Serial.println(frequencia,2);
- }
- }
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