I have a few questions about this ultrasonic transducer.
1) How much voltage will I need to drive it? It says rated to 50V. But how do I know what the minimum needed to power it will be? 2) Can I drive this as a transmitter from an ATTiny? 3) What does the 5 degree beam angle mean? I assume it means that if I have another unit that I want to use as a receiver it will need to be within that 5 degree beam angle.