approximate distance using IR sensor

[bhan19920]

hi,

can i use this simple IR receiver (SN-IR-R) to sense the distance of an object?
basically the task is to emit sound when the object is near. as the object gets closer and closer, the buzzer will beep faster.
i want the ir transmitter and receiver to be separated so that the transmitter can be carry around until it come across the receiver.
does the ir receiver output varies according to the intensity of the IR light?
is that any other better to achieve the above task?

thank you for the reply.

[yonghui]

im suggesting you to use this sensor:
http://cytron.com.my/viewProduct.php?pc ... 20(10-80cm)

OR use ultrasound sensor:
http://cytron.com.my/listProductGroup.p ... Yv/rMn41Q=

[bhan19920]

im suggesting you to use this sensor:
http://cytron.com.my/viewProduct.php?pc ... 20(10-80cm)

OR use ultrasound sensor:
http://cytron.com.my/listProductGroup.p ... Yv/rMn41Q=

I want the transmitter and receiver of the ir to be separated so that i can carry around the transmitter

[yonghui]

if the transmitter and receiver are separate how are u going to estimate the distance? the position of transmitter from receiver will become random.

[bhan19920]

if the transmitter and receiver are separate how are u going to estimate the distance? the position of transmitter from receiver will become random.

Does the ir receiver output varies according to the intensity of ir light it sensed?

[yonghui]

ya, the receiver reading will change according to the intensity of IR it received.

[bhan19920]

ya, the receiver reading will change according to the intensity of IR it received.

Both the ir sensor with 3 pin and 2 pin vary according to intensity?
What is the difference between the 2 pin and 3 pin ir sensor?

[robosang]

Why don you take the time to try and explore, just 2 pins, there are plenty of explanation about IR on the Internet.

[yonghui]

2 pin is like normal LED. 3 pin means?

if u mean the modulated one, it is for sending digital data. one and zero only