3.5 - Small Fan

Now we use the TA6586 to drive the DC motor to make it rotate clockwise and counterclockwise. Since the DC motor requires a relatively large current, for safety reasons, here we use a power module to supply power to the motor.

• DC Motor

• TA6586 - Motor Driver Chip

• Power Supply Module

Bill of Materials

In this project, we need the following components.

It’s definitely convenient to buy a whole kit, here’s the link:

Name	ITEMS IN THIS KIT	LINK
Kepler Kit	450+	Kepler Kit

You can also buy them separately from the links below.

SN	COMPONENT	QUANTITY	LINK
1	Raspberry Pi Pico W	1	BUY
2	Micro USB Cable	1
3	Breadboard	1	BUY
4	Wires	Several	BUY
5	TA6586	1
6	TT Motor	1	BUY
7	Li-po Charger Module	1
8	18650 Battery	1
9	Battery Holder	1

Schematic

Wiring

Note

• Since DC motors require a high current, we use a Li-po Charger module to power the motor here for safety reasons.

• Make sure your Li-po Charger Module is connected as shown in the diagram. Otherwise, a short circuit will likely damage your battery and circuitry.

Code

Note

• You can open the file 3.5_small_fan.ino under the path of kepler-kit-main/arduino/3.5_small_fan.

• Or copy this code into Arduino IDE.

• For detailed tutorials, please refer to Open & Run Code Directly.

• Or run this code directly in the Arduino Web Editor.

Don’t forget to select the Raspberry Pi Pico W board and the correct port before clicking the Upload button.

Once the program is running, the motor will rotate back and forth in a regular pattern.

Note

• If you can not upload the code again, this time you need to connect the RUN pin on the Pico W with a wire to GND to reset it, and then unplug this wire to run the code again.

• This is because the motor is operating with too much current, which may cause the Pico W to disconnect from the computer.