Go Down

Topic: Can you use two IR transistors and and IR LED to pan a turret? (Read 2 times) previous topic - next topic

David82

Apr 12, 2013, 06:48 pm Last Edit: Apr 13, 2013, 04:22 pm by David82 Reason: 1
You would have two IR transistors pointing not quite straight ahead but a little away from each other. They would pan a servo or motor such that they stop when the reading from each Ir transistor was about even, meaning the turret is pointed at the IR led. How far away would that work, roughly, for a normal LED? Are we talking 10ft or 100ft? Has anyone messed with this? If the range is short, is there a better sensor to use besides a camera?

Edit:

What I'm asking about is essentially the same thing as a sun tracker.

http://www.youtube.com/watch?v=bHFCJ7TXcM4

except it will need to follow an IR LED or small cluster of LEDs and be much faster on the response time. I know the servo can move much faster but maybe there is something else limiting the speed like the response time of the phototransistor. Do any of you with experience with this stuff thing that it will be able to work with those modifications?

zoomkat

perhaps you could experiment with a tv IR remote control and draw some conclusions.
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)

David82

THat's the same amount of work as building the whole thing. I'd like to know so that I can skip that and use a camera if the range isn't going to be good.

zoomkat


THat's the same amount of work as building the whole thing. I'd like to know so that I can skip that and use a camera if the range isn't going to be good.


Use a camera for what? You might give more specific info on what you want to do with a camera, and what a camera has to do with "range".
Consider the daffodil. And while you're doing that, I'll be over here, looking through your stuff.   8)

David82

.... I thought it was already clear.

I'll simplify it: What is the range the an IR photo transistor will detect a standard IR LED?

Go Up