Homemade Transistor from Cadmium Sulfide Photocell (2009)

[thenthenthen]

http://sparkbangbuzz.com/cds-fet/cds-fet.htm

[thenthenthen]

Hi HN, just stumbled upon this. Has any one tried this? Why dint he use black tape? Would sanding down the ldr clearcoat reduce the voltage required (i am looking for something near 9V). Any thoughts on better, safer ways to do something like this?

[wolfi1 → thenthenthen]

why not just buy a transistor? they are dirt cheap, or is it for educational purposes?

[Leonard_of_Q → wolfi1]

Not the type of question you'd expect on a site called "Hacker News". Why do experiments when you can buy something? Why tinker with objects when you can buy ready-made ones? Why climb mountains when you can fly over them? Why brew beer when it comes ready-made in bottles?

[thenthenthen → wolfi1]

The latter!

[dvh]

CdS LDRs are quite slow, like 0.1s slow, or is it only when light operated?