This module can be applied to intellectual robot, obstacle avoidance...
This kit comes with AlphaBot robotic platform (line tracking, obstacle...
This electromagnetic transducer is a compact way to add sound to your embedded project. Pololu 1484
This transducer is about 45mm in diameter and has 4Ω impedance and should be run at about 5W
16mm Speaker: 16 Ohm, 0.5 W
30mm Piezo Buzzer: 1-30V
50mm Speaker: 8 Ohm, 1 W
COM-10975 - Surface Transducer - Large, SparkFun
COM-10917 - Surface Transducer - Small, SparkFun