Smart WIFI Robot Car Kit for Arduino
8
www.uctronics.com
2.1.2 Specification
Output signal: Electric frequency signal
Output voltage: 0V(no obstacle),5V(obstacle in range)
Echo signal: output TTL PWL signal
High precision: Up to 0.3cm
Input trigger signal: 10us TTL impulse
Detection distance: 2-450cm
Mode of connection: VCC, trig (T), echo, GND
2.1.3 Wiring diagram:
HC-SR04 Ultrasonic Sensor Module
2.2 L293D Motor Drive Expansion Board