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65 lines
2.0 KiB
ReStructuredText
H-bridge Light
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==============
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.. seo::
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:description: Instructions for setting up a hbridge light.
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:image: brightness-medium.svg
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The ``hbridge`` light platform creates a dual color brightness controlled light from two
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:ref:`float output component <output>`.
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.. figure:: images/hbridge-ui.png
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:align: center
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:width: 40.0%
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H-bridge lights are very common for Christmas lighting and they use 2 wires for a bunch of LEDs.
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The pins are switched alternatively to allow two sets of lights to operate.
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.. code-block:: yaml
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# Example configuration entry
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# Specify the two pins of the h-bridge as PWM pins
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output:
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- platform: esp8266_pwm
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id: pina
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pin: GPIO12
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- platform: esp8266_pwm
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id: pinb
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pin: GPIO14
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# Create a light using the hbridge
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light:
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- platform: hbridge
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id: mainlight
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name: "Hbridge Lights"
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pin_a: pina
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pin_b: pinb
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Internally, H-bridge lights are implemented as cold/warm white lights. This means that the brightness of the two colors
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is mapped to the cold white and warm white values, even if the colors aren't actually white in reality. To individually
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control the colors in the :ref:`light control actions <light-turn_on_action>`, you need to use the ``cold_white`` and
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``warm_white`` options.
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Configuration variables:
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------------------------
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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- **name** (**Required**, string): The name of the light.
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- **pin_a** (**Required**, :ref:`config-id`): The id of the first float :ref:`output` to use for this light.
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- **pin_b** (**Required**, :ref:`config-id`): The id of the second float :ref:`output` to use for this light.
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- All other options from :ref:`Light <config-light>`.
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.. note::
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As we are switching the H-bridge in software, the light may glitch every so often when other tasks run on the MCU.
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See Also
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--------
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- :doc:`/components/light/index`
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- :doc:`/components/output/esp8266_pwm`
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- :apiref:`hbridge/light/hbridge_light.h`
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- :ghedit:`Edit`
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