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Systèmes élec. & informatiques (MESISI120424)
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Quelle (es) affirmation (s) est (sont) vraie (s)?
on peut générer un signal PWM sur la broche:
74HC393, quelle (es) affirmation (s) est fausse (s) ?
The 74HC/HCT393 are 4-bit binary ripple counters with separate clocks (1CP and 2 CP) and master reset (1MR and 2MR) inputs to each counter. The operation of each half of the "393" is the same as the "93" except no externalclock connections are required.The counters are triggered by a HIGH-to-LOW transition of the clock inputs. The counter outputs are internally connected to provide clock inputs to succeeding stages.
Soit le circuit suivant:
Le circuit intégrés 74 HC4051:
choisir le ou les affirmations correctes:
Comment peut-on utiliser le composant 74HC393 pour compter jusqu'à 255?
74HC74, quelle affirmation est fausse ?
int outPin = 9 ;
void setup() {
pinMode(outPin, OUTPUT);
} void loop() {
digitalWrite(outPin, HIGH);
delay(50);
digitalWrite(outPin, LOW);
delay(200);
}
Le rapport cyclique en %:
Soit le circuit suivant:
Soit le circuit suivant: