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Systèmes élec. & informatiques (MESISI120424)
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int sensorPin = A0; int ledPin = 13; int sensorValue = 0;
void setup() {pinMode(ledPin, OUTPUT);}
void loop() {sensorValue = analogRead(sensorPin);digitalWrite(ledPin, HIGH);delay(sensorValue);digitalWrite(ledPin, LOW);delay(sensorValue);}
Le circuit intégrés 74 HC4051:
choisir le ou les affirmations correctes:
Pour réaliser un compteur qui compte jusqu'à 3 et recommence
int ledPin = 9;
void setup() {}
void loop() {for (int fadeValue = 0 ; fadeValue <= 255; fadeValue += 5) { analogWrite(ledPin, fadeValue); delay(30); }
for (int fadeValue = 255 ; fadeValue >= 0; fadeValue -= 5) { analogWrite(ledPin, fadeValue); delay(30); }}
On peut affirmer que le signal PWM a:
Un compteur synchrone modulo 16 permet de compter de
The 74HC74 is dual positive edge triggered D-type flip-flop. They have individual data (nD), clock (nCP), set (nSD) and reset (nRD) inputs, and complementary nQ and nQ outputs. Data at the nD-input, that meets the set-up and hold time requirements on the LOW-to-HIGH clock transition, is stored in the flip-flop and appears at the nQ output.
Quelle affirmation est fausse?
74HC74, quelle est l'affirmation fausse ?
Comment peut-on limiter le compteur 74HC393 à compter uniquement de 0 à 3, puis le faire recommencer automatiquement ?
74HC393, quelle(es) affirmation (s) est vraie (s)?
The master resets are active-HIGH asynchronous inputs to each 4-bit counter identified by the "1" and "2" in the pin description.A HIGH level on the nMR input overrides the clock and sets the outputs LOW.