I'm making a ultrasonic transmitter and receiver pair.
this is not for obstacle avoidance.I use it for measure distance between tx and rx units.
so my question is how to increase the transmission distance?
for IR transmitters increasing the current through IR LED increases its transmission distance.what I need to know is what parameters affect transmission distance of ultrasonic?
I read some articles and posts in internet and some of them has H bridge(send current in both directions) to control the TX transducer
and in some circuits transducer is only fed with signal with respect to ground (send current in single direction)
I have attached similar circuits found on internet to clarify what I'm saying.
So what are the advantages of each method and what is the best method to increase the range?
I have some more questions about receiver side but I guess I need to clarify questions about transmitter side first