LDR sensitivity

[T.Jackson]

Good site www.rentron.com, I managed to learn a lot from there a few years back. Your code looks quite different from the example shown. As for it searching for the brightest source of light under ambient conditions, I think you're expecting just a bit too much from it. LDR's don't really respond to minor variations in light. But not only that, there's not enough goods in the project to make it go searching to begin with. The brightest area of a room might be on the left hand side - while the robot is stuck on the right hand side in a World full of unchanging light levels.

[mackrackit]

At the rentron site, read on to the next section. Uses IR to help with navigation. Even IRs will give trouble in bright light.

You might try lasers, pulse at a high frequency and the receiving circuit set to only respond when the magic frequency is seen.

FREQOUT and COUNT

You could also try shielding the LDRs with a tube of some sort so light can only come from one direction. I tried something like this on a solar tracker. Used a cigar tube. At least the cigar was good.

[jimbobjones]

thanks for the replies

i think i will try to create some kind of shielding


cheers

jim