| 摘要 |
PURPOSE:To confirm an adjustment result and to justify the current of a transmission circuit by adjusting the light-emitting intensity of a light-emitting element by means of the current of the transmission circuit in accordance with a distance to a main equipment mainbody and receiving a response signal from the mainbody. CONSTITUTION:At the time of normal transmission, the transmission circuit 5 is set so that a DC limitation resistance 11 is serially set. When an air harmonic machine mainbody can receive the signal of a remote controller, it returns the response signal. When it is beyond an infrared ray arrival distance, the signal is not returned, and therefore a transistor 10 is turned on by the output from a micro computer 1 after standby for a prescribed time, the light-emitting intensity of the infrared ray-emitting diode 7 increases, and the arrival distance becomes maximum. When the temperature of a room where the mainbody is installed is lowered, the micro computer 1 gives a decision by information from a temperature sensor 2 in the room, the transistor 10 is turned on and the light-emitting intensity of the diode 7 increases even when the temperature is lowered at <=10 deg.C. Thus, the consumption power of a battery being a driving power source can be reduced and a life can be prolonged. |
