I am new to the world of electronics, I am using a T-displays-S3 for a project in which to prevent the board from heating up, I have a small 5v fan connected directly to the board (WINSINN-Brushless DC 5V 30mm) that it requires 0.126A, so I understand that it is not a big problem if it is directly connected to the board. My idea is to control the speed of the fan depending on the temperature of the CPU, so my question is can I use a Mosfet IRF520 or what do you recommend?
Thank you.
I have no clue how you got to that conclusion. But it is wrong. The ESP32-S3 might source 28mA at most and sink less than 40mA. So if you connected that fan directly your pint is probably fried.
Perhaps I have put some wrong data, but the fan has been working for weeks without any problem, this is the model I am referring to (WINSINN DC Cooling 30mm Fan Improved for 3D Printer) so that you can review the data.
I have not specified it before, but right now the fan is not connected to any signal pin, it is connected to the GND and 3V pin. Currently there is no speed control, it is constant
That's not a link to the datasheet and the offer is even for multiple different models.
It may be that the fan run for some time but if the current is outside the datasheet specs you will damage the ESP sooner or later.
Is it that hard to put a transistor in-between to save the board?
Yes, my idea is to add a transistor, or whatever is necessary, so my question is which model of transistor would be the recommended one and how the electrical diagram should be.
Thanks in advance.
Post the datasheet and the exact type of your fan!
What transistor types do you already have?
The fan model is (WINSINN-Brushless DC 5V 30mm), connected to a breadboard it consumes between 0.03A and 0.04A, I have transistors (S8050) and (PN2222A) I guess the last one is the most appropriate for this.
Both transistors should work. Connect the fan to 5V than to the collector of the transistor. The emitter goes to GND. Use a 1kΩ resistor to connect the base to the MCU pin.
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