fiber tensiograph

Hi all,

I'm a mechanics student in my final year of a bachelors course and I'm currently preparing for my final year project. For this project I have decided to build a fiber tensiograph, as outlined here -

I've researched this equipment for a while now, and as far as I'm concerned it is suitable for use with a teniograph. Is there any reason why it mightn't, or might there be more suitable equipment in your opinion? I'm just a bit worried about buying equipment which won't work...

I hope to feed the photodiode output of the phododiode into a ADC. I was wondering if I would need to buy a driver circuit to power my LED. I'm aware that lasers use laser driver circuits that deliver a very stable current supply to the laser. Is this an issue for LEDs?

Thanks very much for your help,

Happy new year,

Ian.