hi all,
I need help with my uni project and i have been stuck at this point for days.
All i want to now is to transmit ultrasound using the arduino board. AND THATS IT!! I dont want want to detect or anything else at this point .
this is the UT i am using http://www.jaycar.com.au/products_uploaded/AU5550.pdf
and this is my source code
const int pingPin = 9;
void setup() {
}
void loop()
{
pinMode(pingPin, OUTPUT);
digitalWrite(pingPin, LOW);
delayMicroseconds(2);
digitalWrite(pingPin, HIGH);
delayMicroseconds(23);
}
negetive pin is grounded and positive pin is connected to 5v.
My question are :-
From my calculation , the frequency is 40kHz . Am i right ?
2)how can i calculate the p-p voltage ?
3) Do i need to use a op-amp to drive the ut ?
4)Also is there any to know if the UT is working ?
I am a real noob with electronics and so plz help me with this.
thanks in advance!