Negative voltage from a 9V battery?!

[brodin]

How do i get -5V from a 9V battery? Is that possible? Difficult?

 

[kinjalgp]

Here is one:
**broken link removed**

 

[crust]

There are also many prebuilt DC-DC converters in DIP/SIP packages for generating -5V.

 

[Exo]

You could of course use 2 batteries if this isn't a problem for you

 

[vincentng]

HOw about 7905 (TO-92 form for less power and TO-220 form for high power)

Vincent

 

[mozikluv]

-5v frm 9v

hi,

if your current need is low the recom of kinjalgp is okay, but if you need bigger current source then the recom of exo would be preferred.

i think using the 7905 would be okay but that would depend on the circuit design of the project with respect to ground of the circuit and the supply ground.