text: import esphome.codegen as cg
  import esphome.config_validation as cv
  from esphome import pins
  from esphome.const import CONF_ENABLE_TIME, CONF_ID, CONF_KEEP_ON_TIME, CONF_PIN
  
  power_supply_ns = cg.esphome_ns.namespace('power_supply')
  PowerSupply = power_supply_ns.class_('PowerSupply', cg.Component)
  MULTI_CONF = True
  
  CONFIG_SCHEMA = cv.Schema({
      cv.Required(CONF_ID): cv.declare_id(PowerSupply),
      cv.Required(CONF_PIN): pins.gpio_output_pin_schema,
      cv.Optional(CONF_ENABLE_TIME, default='20ms'): cv.positive_time_period_milliseconds,
      cv.Optional(CONF_KEEP_ON_TIME, default='10s'): cv.positive_time_period_milliseconds,
  }).extend(cv.COMPONENT_SCHEMA)
  
  
  def to_code(config):
      var = cg.new_Pvariable(config[CONF_ID])
      yield cg.register_component(var, config)
  
      pin = yield cg.gpio_pin_expression(config[CONF_PIN])
      cg.add(var.set_pin(pin))
      cg.add(var.set_enable_time(config[CONF_ENABLE_TIME]))
      cg.add(var.set_keep_on_time(config[CONF_KEEP_ON_TIME]))
  
      cg.add_define('USE_POWER_SUPPLY')
  