synergistic research orange blue fuse direction.

audiozenology "Can someone please tell me how CdS cells work and whether they are passive or active devices?"

I really do encourage you to acquire through purchase or your local library an introductory text on electronics so that you can "connect the dots" as Americans would say regarding you're incomplete knowledge base also "Google is you're friend" is a very popular expression for a very valid, sound, understandable reason.

audiozenology" Clearthink. If you are going to be a total troll"

Why don't you focus you're energies, thinking, and reasoning on audio and music and stop trolling me.