How to judge the quality of the launching tube during use

　　Because the transmitter tube is infrared, the human eye can not perceive, not to the light-emitting diode is very intuitive, the light is not bright or the brightness is very low, it means that the light-emitting diode can not be broken, judge whether the remote control on our hand is good, you can point the camera on the mobile phone at the transmitter tube on the remote control, and then press any key, You can see clearly from the mobile phone whether the infrared emission tube has a light.

　　So the receiving distance of the infrared receiving head and the infrared transmitting tube you use have a very close relationship, you use the transmitter, your receiving distance is further; This of course also has a lot to do with the design of the remote control (the size of the drive current designed for the infrared transmitter tube), the greater the current you design to drive, of course, the farther the receiving distance will be

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