SunFounder PiDog Kit, Release 1.0
• Power supply: 3.3V
• Communication: IIC
• Connector: SH1.0 4P
• LEDs: 3535 RGB LEDs
Pin Out
• GND - Ground Input
• VCC - Power Supply Input
• SDA - IIC SDA
• SCL - IIC SCL
3.7 Ultrasonic Module
• TRIG: Trigger Pulse Input
• ECHO: Echo Pulse Output
• GND: Ground
• VCC: 5V Supply
This is the HC-SR04 ultrasonic distance sensor, providing non-contact measurement from 2 cm to 400 cm with a range
accuracy of up to 3 mm. Included on the module is an ultrasonic transmitter, a receiver and a control circuit.
You only need to connect 4 pins: VCC (power), Trig (trigger), Echo (receive) and GND (ground) to make it easy to
use for your measurement projects.
Features
• Working Voltage: DC5V
• Working Current: 16mA
• Working Frequency: 40Hz
98 Chapter 3. Hardware
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