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How to judge the quality of an infrared filter?

Connect a 5V power supply in series with a 100ohm resistor, connect them to the two pins, turn on the camera function of the mobile phone, and find a view of the infrared LED. If the infrared LED is on, it means that the infrared filter works well. If the infrared LED is not on, exchange the positive and negative poles of the power supply; if the infrared LED is still not on, it means that the infrared filter doesn’t work well, because the camera of mobile phone can receive infrared rays.

What materials are infrared filters made of?

Connect a 5V power supply in series with a 100ohm resistor, connect to the two pins, turn on the camera function of the mobile phone, and find a view of the infrared LED. If the infrared LED is on, it means that the infrared filter works well. If the infrared LED is not on, exchange the positive and negative poles of the power supply; if the infrared LED is still not on, it means that the infrared filter doesn’t work well, because the camera of mobile phone can receive infrared rays.

What are the function and principle of infrared filters?

Connect a 5V power supply in series with a 100ohm resistor, connect to the two pins, turn on the camera function of the mobile phone, and find a view of the infrared LED. If the infrared LED is on, it means that the infrared filter works well. If the infrared LED is not on, exchange the positive and negative poles of the power supply; if the infrared LED is still not on, it means that the infrared filter doesn’t work well, because the camera of mobile phone can receive infrared rays.

What is module stability related to?

Connect a 5V power supply in series with a 100ohm resistor, connect to the two pins, turn on the camera function of the mobile phone, and find a view of the infrared LED. If the infrared LED is on, it means that the infrared filter works well. If the infrared LED is not on, exchange the positive and negative poles of the power supply; if the infrared LED is still not on, it means that the infrared filter doesn’t work well, because the camera of mobile phone can receive infrared rays.

What are common problems with sensor modules?

Connect a 5V power supply in series with a 100ohm resistor, connect to the two pins, turn on the camera function of the mobile phone, and find a view of the infrared LED. If the infrared LED is on, it means that the infrared filter works well. If the infrared LED is not on, exchange the positive and negative poles of the power supply; if the infrared LED is still not on, it means that the infrared filter doesn’t work well, because the camera of mobile phone can receive infrared rays.

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