Generic switching transistor??

things

New Member

• Oct 26, 2007

• #1

hi all,
I need to build a timer circuit for a fog machine, and know all the other stuff, but one thing that has got me is that it needs a "generic switching transistor"?? All this transistor has to do is switch a relay, so it doesn't have to be rated for high current. Does anyone know what make numbers some of these are?
thanks!

 

S

ssylee

New Member

• Oct 26, 2007

• #2

I think what it's meant by "generic switching transistor" would be a generic pnp or npn transistor like a 2N3906 + 2N3904 pair or 2N2907 + 2N2222 pair. Correct me if I'm wrong. You would have to do some calculations based on how much current you want and how fast you want them to switch.

 

blueroomelectronics

Well-Known Member

• Oct 26, 2007

• #3

2N2222A is pretty generic (assuming NPN is required)

 

things

New Member

• Oct 26, 2007

• #4

well it doesn't tell me whether NPN or not, but this is the circuit i am trying to build. Fast switching is not really a prob, since it is for a fog machine.

 

blueroomelectronics

Well-Known Member

• Oct 26, 2007

• #5

It's NPN, a 2N2222A will work fine.

 

things

New Member

• Oct 26, 2007

• #6

ok thanks alot guys!