An LED as a light Sensor

[bbarney]

Thank's for the code Funky
I'am working on something at the moment but I'll be playing around with this idea just as soon as i can get my other project done.I'll keep in touch
bbarney

[Funky Gibbon]

OK BBarney

I should point out that the code is mine but the original concept is'nt so i can't take any credit for the idea, also it is a new concept to me also so im at the learning stage.
i'll post updates on progress, there is some potential here for applications, not everyone has got photodiodes in their bit boxes but just about everyone has an led kicking around somewhere, besides i like the idea of using a device as emiter and sensor in one package

[bbarney]

OK Funky
that about sum's it up for me too you can pm anytime.talk too you later

[Joval]

Hi,
I used leds years ago as light sensors for a solar tracker. I also remember taking the cap off of a ck722 transistor (Some of the first commercial transistors) and using it like a phototransistor.
How's that for dating myself!!!!!

Joe

[dhouston]

How's that for dating myself!!!!!

Doesn't "dating oneself" lead to hairy palms?

[Funky Gibbon]

Aparently so Joval, as far back as 1978 it says in the pdf i read, and their only just telling us now? BTW i hear Veet works well on them Palms, lol

[John Brewer]

Don't worry about dating yourself?... Remember the OC71 germanium transistor and the OCP71 photo transistor. They were the same device but the OC71 was covered in black paint and cost 10 times less than the OCP71 so we used to scrape the paint off! The manufacturers retaliated by filling the OC71 with opaque paste. We got around this by attatching the transistor by its legs into a spin dryer and driving the paste down away from the junction. Those were the days! John, PIC newby.