What resistance do I need?

[wesleylagunsad]

can i ask u a question?
how much resistance do i need to emit a 3.7volts from a 9volts supply?

 

[CocaCola]

You might want to stop asking the same question in multiple threads...

To answer your question one would need to know the current draw of the circuit...

 

[(*steve*)]

I've moved this into its own thread. The places you picked were inappropriate.

CocaCola asks a very valid question. Even more important to realise is that if the current draw changes (or your 9V supply changes voltage -- say if it's a battery) the voltage will change.

It would be useful to know what you actually want to do (say, drive a motor, light a LED, or charge a lithium battery. Each of these might need 3.7V, but the circuit you would use in each case would be very different.