Using IR Correctly?

[pixelsnpings]

Hey.


Im now using a 555 timer to drive a 40kHz IR LED output for Radio Shack's
GP1U52X IR Receiver/Demodulator.

Do I have to connect the receiver to a tone decoder if im only using the bear 40kHz signal?

Im not using the 40kHz as a carrier.

 

[@MR]

what is your project???
what is the application of you IR???

 

[pixelsnpings]

Im building an autonomus RC car, and Im using IR for object detection.

 

[audioguru]

Sharp's datasheet doesn't say what it does.
Other IR receivers have an output that goes low if it detects 40kHz modulated IR. They are designed to receive bursts of data. Therefore they reduce their sensitivity if continuous 40kHz IR is received because it might be interference from a compact fluorescent light bulb.

 

[Nigel Goodwin]

Hey.


Im now using a 555 timer to drive a 40kHz IR LED output for Radio Shack's
GP1U52X IR Receiver/Demodulator.

Do I have to connect the receiver to a tone decoder if im only using the bear 40kHz signal?

Im not using the 40kHz as a carrier.

Actually you are! - it's NOT optional.

For object detection you might try my Cybot pages at

 

[jpanhalt]

This site will give you a lot of useful information on object avoidance:

http://users.frii.com/dlc/robotics/projects/botproj.htm

The 556-based circuit I posted on your previous thread was also for that purpose. John