Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: Xyver on May 09, 2010, 02:45:24 PM

Title: IR recievers for line follower?
Post by: Xyver on May 09, 2010, 02:45:24 PM

Can you use normal photoresistors (like the ones in the 50$ robot) to detect IR light?

Title: Re: IR recievers for line follower?
Post by: Soeren on May 10, 2010, 01:46:52 AM

Hi,

Response will be only a few percent of what you will get with visible light if any at all. The results will vary with different LDRs, but none are really useable for IR.
Phototransistors often have their peak sensitivity at IR wavelengths, so would be a much better choice.