Current controlled switch

[salcats]

I'm a new user and a mathematician by training so little experience with circuits.

Does anyone have a working example of using a current controlled switch? 

I've tried to construct a basic example but can't seem to get it working. 

Thanks

[tipa]

Привет! Так лучше свои идеи выкладывать в файле формата "ms"

[tipa]

Привет!