Transistor as switch

[Jon marshal]

I am workin on 2n2907 as transistor as switch but facing difficulty to manage its circuit properly

[mod edit: link promoting personal website removed]

 

[Bluejets]

Familar topic....

Try here.....look down left side for "200 transistor circuits"....free stuff
http://www.talkingelectronics.com/te_interactive_index.html

 

[Harald Kapp]

Or see our resource.

 

[crutschow]

So what's the difficulty, and what load are you trying to switch?