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85 lines
2.9 KiB
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85 lines
2.9 KiB
ReStructuredText
H-bridge Fan
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============
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.. seo::
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:description: Instructions for setting up hbridge controlled fans (or motors).
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:image: fan.svg
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The ``hbridge`` fan platform allows you to use a compatible *h-bridge* (L298N, DRV8871, MX1508, BTS7960, L9110S, DRV8833, TB6612, etc.) to control a fan (or motor/solenoid).
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.. figure:: images/L298N_module.jpg
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:align: center
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:target: `kuongshun`_
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:width: 50.0%
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L298N H-bridge module. Image by `kuongshun`_.
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.. _kuongshun: https://kuongshun.com/products/l298n-stepper-motor-driver-board-red
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.. figure:: images/fan-ui.png
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:align: center
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:width: 80.0%
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.. code-block:: yaml
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# Example configuration entry
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output:
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- platform: ...
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id: motor_forward_pin
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pin: GPIO5
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- platform: ...
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id: motor_reverse_pin
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pin: GPIO4
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fan:
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- platform: hbridge
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id: my_fan
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name: "Living Room Fan"
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pin_a: motor_forward_pin
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pin_b: motor_reverse_pin
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# enable_pin: motor_enable
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decay_mode: slow # slow decay mode (coasting) or fast decay (braking).
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Configuration variables:
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------------------------
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- **pin_a** (**Required**, :ref:`config-id`): The id of the
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:ref:`float output <output>` connected to Pin A (alternatively IN1, etc.) of the h-bridge.
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- **pin_b** (**Required**, :ref:`config-id`): The id of the
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:ref:`float output <output>` connected to Pin B (alternatively IN2, etc.) of the h-bridge.
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- **enable_pin** (*Optional*, :ref:`config-id`): The id of the
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:ref:`float output <output>` connected to the Enable pin of the h-bridge (if h-bridge uses enable).
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- **decay_mode** (*Optional*, string): The decay mode you want to use with
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the h-bridge. Either ``slow`` (coasting) or ``fast`` (braking). Defaults to ``slow``.
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- **speed_count** (*Optional*, int): Set the number of supported discrete speed levels. The value is used
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to calculate the percentages for each speed. E.g. ``2`` means that you have 50% and 100% while ``100``
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will allow 1% increments in the output. Defaults to ``100``.
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- **name** (**Required**, string): The name for this fan.
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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- **preset_modes** (*Optional*): A list of preset modes for this fan. Preset modes can be used in automations (i.e. `on_preset_set`).
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- All other options from :ref:`Fan Component <config-fan>`.
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.. _fan-hbridge_brake_action:
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``fan.hbridge.brake`` Action
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----------------------------
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Set all h-bridge pins high, shorting the fan/motor's windings and forcing the motor to actively stop.
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.. code-block:: yaml
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on_...:
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then:
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- fan.hbridge.brake: my_fan
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See Also
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--------
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- :doc:`/components/output/index`
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- :doc:`/components/fan/index`
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- :doc:`/components/output/ledc`
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- :doc:`/components/output/esp8266_pwm`
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- :apiref:`fan/fan_state.h`
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- `Adafruit's excellent H-bridge tutorial <https://learn.adafruit.com/improve-brushed-dc-motor-performance>`__
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- :ghedit:`Edit`
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