.. include:: /index.rst
   :start-after: start_hello_message
   :end-before: end_hello_message



.. _fan_mini:

Fans
============

Active Cooler
----------------

The Active Cooler on the Pironman 5 Mini is controlled by the Raspberry Pi system.

.. image:: img/active_cooler.png

Regarding cooling solutions for the Raspberry Pi 5, 
especially under heavy load, the design of the Pironman 5 Mini incorporates a smart cooling system. 
It features a primary Active Cooler (active cooler) and a supplementary RGB fan. 
The cooling strategy is closely integrated with the Raspberry Pi 5's thermal management system.

The Active Cooler's operation is based on the Raspberry Pi 5's temperature:

* Below 50°C, the Active Cooler remains off (0% speed).
* At 50°C, the fan starts at a low speed (30% speed).
* Reaching 60°C, the fan increases to a medium speed (50% speed).
* At 67.5°C, the fan ramps up to a high speed (70% speed).
* At 75°C and above, the fan operates at full speed (100% speed).

This temperature-to-speed relationship also applies when the temperature decreases, with a 5°C hysteresis. The fan speed reduces when the temperature falls 5°C below each of these thresholds.

* Commands to monitor the Active Cooler. To check the Active Cooler's status:

  .. code-block:: shell
  
    cat /sys/class/thermal/cooling_device0/cur_state

* To view the Active Cooler's speed:

  .. code-block:: shell

    cat /sys/devices/platform/cooling_fan/hwmon/*/fan1_input

In the Pironman 5 Mini, the Active Cooler is a critical component for maintaining optimal operating temperatures, particularly during intensive tasks, ensuring the Raspberry Pi 5 runs efficiently and reliably.

RGB Fan
-------------------

.. image:: img/size_fan.png

* **Extermal dimension**: 40*40*10MM
* **Weight**: 13.5±5g/pcs
* **Life**: 40,000 hours (room temperature 25°C)
* **Maximum Air Flow**: 2.46CFM
* **Max.Air Pressure**: 0.62mm-H2O
* **Accoustic Sound**: 22.31dBA
* **Rated Input power**: 5V/0.1A
* **Rated Speed**: 3500±10%RPM
* **Operating Temperature**: -10℃~+70℃
* **Storage Temperature**: -30℃~+85℃