Sonar:bit is a 3-wire ultrasonic module with the working voltage between 3-5V. It is available to be used to 3.3V or 5V micro-controller system. With only one 3-wire(GVS) cable, it can work properly. Compared to the normal 4-wire ultrasonic module, it has saved one IO port.
The measurement range of sonar:bit is 4cm-400cm. It can output stable and accurate measurement data with ±1cm tolerance only.
It can connect to the Ring:bit with an expansion board.
Input voltage:3V~5V and can be driven by micro:bit directly.
Standard 3-wire GVS connecotr, which occupies 1 IO port only.
|Name||Ring:bit Car v2 Sonar:bit|
|Working Voltage||DC 3-5V|
|Connections||3pin GVS Connection|
5.4. Outlook and Dimensions#
5.5. Quick to Start#
Connect the acrylic transition board to the back board with the rivets.
Connect the Sonar:bit to the other side of the acrylic transition board with rivets.
Connect the Sonar:bit to the Ring:bit breakout board with a 3-pin wire.
Preparation for Programming: Info
# Import modules that we need import board from ringbit import * # Set the pins of both wheels ringbit = Ringbit(board.P1, board.P2) # Change the speed in accordance with the distances detected by the sonar:bit while True: if ringbit.get_distance(board.P0, Unit.cm) > 20: ringbit.set_speed(100, 100) else: ringbit.set_speed(0, 0)
Details of the program#
1.Import the modules that we need.
board is the common container, and you can connect the pins you’d like to use through it;
ringbit module contains classes and functions for Ring:bit smart car operations.
import board from ringbit import *
2.Set the pins of the servos
ringbit = Ringbit(board.P1, board.P2)
3.While true, set the speed to be controlled by the distance value given by the sonar:bit
while True: if ringbit.get_distance(board.P0, Unit.cm) > 20: ringbit.set_speed(100, 100) else: ringbit.set_speed(0, 0)
The Ring:bit car drives normally when there are no obstacles, stops when there are obstacles, and continues to drive when the obstacles leave.