Time-Lapse

[mackrackit]

FYI g-hoot,
http://en.wikipedia.org/wiki/Photoresistor
Now Ted has code for his project too and what speed to expect.

[g-hoot]

FYI g-hoot,
http://en.wikipedia.org/wiki/Photoresistor
Now Ted has code for his project too and what speed to expect.

Dave,
Thanks for the link. I think the sentence below may explain why several different cells produce basically the same results:

"Many commercially available CdS cells have a peak sensitivity in the region of 500nm - 600nm (green light)."

Gary

[mackrackit]

Yeah, that green light thing nailed me a few years ago. Had a project working the way I wanted in the shop and never thought about how sun light has a different spectrum until I took it out side. All of my setting were off.

[Ted's]

I like the symbol

I am going to use a device that looks similar to a CDS cell and a ldr, maybe it is a ldr. It is very flat and it's dimensions are 4mm x 4mm. Do you have an idea on how to keep the LDR on the led even though the camera is moving?

[g-hoot]

Do you have an idea on how to keep the LDR on the led even though the camera is moving?

Well, I'm from OK, so tape is an obvious choice. :-) You could just use some long wires on the light sensor and tape it, or for a more permanent solution, maybe a clear glue on the face of the cell, then glue around the outside with something black to block light out. Black caulking would work. For the clear glue, use GOOP. It sticks to everything, is clear, and peels right off if you need to clean it off later.
Gary

[Ted's]

What is OK?

[g-hoot]

Sorry, the abbreviation for the state of Oklahoma in the US. We're kinda rednecks down here. Well at least some of us are. ;-)
Gary