Welcome to Jetson CUBE case repository

3. Fan drive

Fan drive

Fan driveI. Learning ObjectivesII. Pre-lab PreparationIII. Using the CubeNano driver library to control the fan1. Import the CubeNano driver library and create the objects.2. Setting the fan switch3. Code DemoIV. Using Jupyter lab to control the fan1. Import the CubeNano driver library and create objects2. Turn off the fan3. Turn on the fan4. Deletion of objectsV. Experimental phenomena

I. Learning Objectives

Master the Jetson Nano series motherboard driver fan
Control fans using the CubeNano driver library
Control the fan via Jupyter lab

II. Pre-lab Preparation

Follow the assembly video tutorial to install the Jetson CUBE Nano chassis, or refer to the "Jetson CUBE Nano Chassis_Hardware Wiring" tutorial document for installation, here we show the chassis expansion board and RGB light bar and fan hardware connections.

Chassis expansion board	3 Pin connector	2 Pin connector
	RGB light bar	Fan

III. Using the CubeNano driver library to control the fan

1. Import the CubeNano driver library and create the objects.

The name of CubeNano driver library is CubeNanoLib, use CubeNanoLib to import the library in the programme.


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from CubeNanoLib import CubeNano

The CubeNanoLib library functions needed to control the fan:


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set_Fan(state) # 设置风扇开关# Setting the fan switch

2. Setting the fan switch

set_Fan(state) : set fan switch

state value	Fan state
0	close
1	open

3. Code Demo

Turning the fan on/off (python interactive interface: each statement needs to be run separately)


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from CubeNanoLib import CubeNano
bot = CubeNano(i2c_bus=1)
bot.set_Fan(0)
bot.set_Fan(1)
del bot

Note: To terminate the run you can press Ctrl + Z

turn on the fan (Fan_start.py)


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from CubeNanoLib import CubeNano
if __name__ ==  '__main__':
    bot = CubeNano(i2c_bus=1)
    bot.set_Fan(1)

Turn off the fan (Fan_stop.py)


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from CubeNanoLib import CubeNano
if __name__ ==  '__main__':
    bot = CubeNano(i2c_bus=1)
    bot.set_Fan(0)

Note: To terminate the run you can press Ctrl + Z

IV. Using Jupyter lab to control the fan

In the Jupyter lab interface create a new file and create the following code block, edit the following content (Fan_Test.ipynb) respectively:

1. Import the CubeNano driver library and create objects


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from CubeNanoLib import CubeNano
bot = CubeNano(i2c_bus=1)

2. Turn off the fan


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bot.set_Fan(0)

3. Turn on the fan


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bot.set_Fan(1)

4. Deletion of objects


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del bot

Jupyter lab basic operation

If you find that the code runs abnormally, it is recommended that you follow the steps in the diagram once and then retest the code block.

V. Experimental phenomena

Run the code or file related to opening the fan:

You can see the fan in the chassis box lights up blue and rotates

Run the code or file related to shutting down the fan:

You can see that the blue light of the fan inside the chassis box goes out and stops spinning.

OLED display

RGB Light Bar Driver