Senzor Ultrasonic distanta HC-SR04 Arduino / PIC / AVR / ARM / STM32

Ultrasonic ranging module HC - SR04 provides 2cm - 400cm non-contact measurement function, the ranging accuracy can reach to 3mm. The modules includes ultrasonic transmitters, receiver and control circuit. The basic principle of work:

•  Using IO trigger for at least 10us high level signal,
•  The Module automatically sends eight 40 kHz and detect whether there is a pulse signal back.

•  IF the signal back, through high level , time of high output IO duration is the time from sending ultrasonic to returning. Test distance = (high level time×velocity of sound (340M/S) /2

  

Wire connecting direct as following:

•  5V Supply
• Trigger Pulse Input
• Echo Pulse Output
•  0V Ground

If you are sourcing a ultrasonic ranging module , the HC-SR04 is good choose . Its stable performance and high ranging accuracy  make it a popular module in electronic market .

Compared to the Shap IR ranging module , HC-SR04 is more inexpensive than it . But it has the same ranging accuracy and longer ranging distance.

Specifications:

• power supply :5V DC
• quiescent current : <2mA
• effectual angle: <15°
• ranging distance : 2cm – 500 cm
• resolution : 0.3 cm

There are 4 pins out of the module : VCC , Trig, Echo, GND . So it's a very easy interface for controller to use it ranging. The all process is : pull the Trig pin to high level  for more than 10us impulse , the module start ranging ; finish ranging , If you find an object in front , Echo pin will be high level , and based on the different distance,it will take the different duration of high level. So we can calculated the distance easily :

Distance = ((Duration of high level)*(Sonic :340m/s))/2

!!!!!!!!!!!!!! ATENTIE !!!!!!!!!!!!!

1. Preturile nu se negociaza

2. Transport:

• Comanda minima este de 40 RON

• Costul transportului prin Cargus este 15 RON / comanda (indiferent de nr. de produse comandate,

• indiferent de suma afisata pe Ocazii)

• Daca comanda este sub 40 RON costul transportului este 20 RON

• NU trimit prin posta romana

• Expedierea produselor se va face in 24 – 48 ore ( cei care asteapta sa expediez coletul imediat dupa

• licitatie, ii rog sa cumpere din alta parte)

3. Predare personala in Cluj

• doar in Zorior zona Sigma, Luni – Joi dupa ora 18:00

• predare personla in Zalau doar in weekend (va rog sa ma contactati)

4. Nota generala:

• Acord negativ celor care incerca sa negocieze pretul dupa ce au licitat si voi refuza sa expediez coletul – se

• aplica si in cazul predarii personale

• Pt orice problema nu ezitati sa ma contactati – sunt sigur ca impreuna vom putea rezolva problema