Go Down

Topic: reading an ultrasonic sensor (Read 1 time) previous topic - next topic

PgrAm

I'm building my own ultrasonic ranger so I don't have to pay the ridiculous prices for devices like Ping))). So far I got the transmitting part working (it produces 40khz I checked on a scope). The receiving part is giving me some trouble, I don't understand analog very well circuits so bear with me, I used a basic mic pre-amp circuit (here:http://schematics.circuitdiagram.net/images/viu1261279341a.jpg) with an ultrasonic transducer and tried reading it with my arduino analog pins and it doesn't seem to react to the ultrasonic noises. Does anybody have any idea how I can listen for ultrasonic frequencies using my transducer (040k2)? If I can somehow amplify my signal with an hbridge then that would be great cuz i'm already using half of a quad h-bridge ic (sn754410) for my transmitter.


doughboy

if by ridiculous price, you mean $29.99

http://www.parallax.com/Store/Sensors/ObjectDetection/tabid/176/ProductID/92/List/1/Default.aspx?SortField=ProductName,ProductName

how about $2.26
http://www.ebay.com/itm/1pcs-Ultrasonic-Module-HC-SR04-Distance-Measuring-Transducer-Sensor-for-Arduino-/261009210866?pt=LH_DefaultDomain_0&hash=item3cc55c7df2

or way less if you are not in a hurry and bid on auctions.

Go Up
 


Please enter a valid email to subscribe

Confirm your email address

We need to confirm your email address.
To complete the subscription, please click the link in the email we just sent you.

Thank you for subscribing!

Arduino
via Egeo 16
Torino, 10131
Italy