Let's Make Robots!
Seeks light, runs away when it bumps into something.
This is Blue Bug, not my first robot but the first one I am posting here... The body was made using a couple of old DVD's. I used the herbie circuit from the book … Read more

Ultrasonic Transducer Transmitter\Reciever

HI,

 

I am trying to make an ultransonic obstacle sensor, I just need to know if the Transmitter and reciever have polarity? And if so how do I tell which is the Cathode and which is the anode?

The transmitter and reciever I have are the following.