Supply different voltages using a dual dc supply?

[riie]

Hi all,

I have
- 2 ICs that requires -10v and +10v
- 1 IC that requires -5v and +5v

How can I power them using one dual dc supply?

Thanks!

 

[davenn]

use a +5V and a -5V regulator off the respective +10 and -10V rails
easy as pie :)

just make sure your 10V rails are able to supply the required current for the 10V IC(s) as well as the 5V IC(s)

Dave

Dave

 

[riie]

Forgot to mention that the dual dc supply is a variable supply used in lab.

So just to confirm, I need a 7805 and a 7905 voltage regulator for +5v and -5v respectively?

 

[davenn]

regardless of if its a variable supply, you will have it set at 10V anyway, so yes a 7805 and 7905

You have no reason to be continuously varing the voltage do you ?

Dave

 

[sophiecentaur]

I should have thought that two 5V Zener diodes could do the job nicely - if your +-5V current requirement is small.