I.Objective
II.Parts and Devices
III.Hardware Installation
IV.Circuit Connection
V.Software Installation
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No. | Picture | Device | Qty. | Accessories | Link |
1 | ![]() |
Ultrosonic Sensor | 1 | M1.4*8 Screw x 4 M1.4 Nut x 4 |
Click here to buy |
2 | ![]() |
Servo Motor | 1 | M2.2*8 Self Tapping Screw x 2 M2*4 Self Tapping Screw x 1 |
Click here to buy |
3 | ![]() |
Mount Holder for Ultrasonic Sensor | 1 | M1.4*8 Screw x 4 M1.4 Nut x 4 M2*4 Self Tapping Screw x 1 |
Click here to buy |
4 | ![]() |
20Pin jumper wire female to female 20cm | some | ||
5 | ![]() |
Philips screwdriver | 1 | Click here to buy |
Step 1: You must complete Lesson 1 basic frame work
Step 2: Install servo motor at the front of upper car chassis with 2pcs M2.2*8 Self Tapping Screws
Step 3: Install Ultrasonic Module to mount holder with 4pcs M1.4*8 screw and M1.4 nuts
Step 4: Install mount holder for Ultrasonic Module on servo motor with M2*4 Self Tapping screw
Connect SG90 servo motor to PWM 15 of PCA9685 compatible module, and connect GND and VCC of ultrasonic module to GND and V+ of PCA9685 compatible module, then connect TRIG and ECHO of ultrasonic module to GPIO20 and GPIO21 of raspberry pi as following graph (Remember : DO NOT remove any existing wires installed in Lesson 1 ):
Make sure you have installed rpi.gpio and adafruit-pca9685 library in lesson 1 .
Download the python code by typing following command in your Raspberry Pi terminal:
wget http://osoyoo.com/driver/picar/picar-obstacle-avoid.py![]()
Turn on the battery of your car and your servo and run the program,
If you are using Python 2 in Raspberry Pi 3, type:
python picar-obstacle-avoid.py
or if you are using Python 3 in Pi 4, type :
python3 picar-obstacle-avoid.py
Your servo will rotate the ultrasonic sensor to front position for 3 seconds. If your sensor is not facing front direction, please turn off the battery or press Ctrl-C key to stop the program. Then remove the sensor from servo and re-install it, make sure it faces front and fix the position with screw, now your can type same command python picar-obstacle-avoid.py and run the program again.
Now the car will automatically make obstacle avoidance auto driving.
DownLoad Url osoyoo.com