I want to run my Raspberry Pi from batteries. I am wishing to use a 9v battery.
But due to lack of Electrical Knowledge I am not sure how to get 5v regulated voltage with 2amp current...

Sorry for Bad English.
Thanks in advance,
Shawon.

 

9 Volt batteries, normally available are type PP9, and will not be able to give 2 amps.

I would suggest using a 6 or 12 V rechargeable battery with a 5 Volt SMPS.

Ramesh

 

Do you need a full 2A for the Raspberry Pi? Generally you can use a IC regulator such this but it would dissipate (9V-5V) * 2A = 8W at 2A output so would need to be on an adequate heat sink.

 

Ok, what if i want to use a 6v, 4.5Ah battery?
I meant, which IC/regulator should i use and what kinds of schemetic should i follow?

And what does 'SMPS' mean?

 

Actually i would not need exact 2A always; but somtimes I may need. Thats why i am planning to build one with atleast 2amp output.
And i think, 2A will not harm my RPi, if i use so instead of 750mAh?

BTW, Thanks.

 

Ok, what if i want to use a 6v, 4.5Ah battery?
I meant, which IC/regulator should i use and what kinds of schemetic should i follow?

And what does 'SMPS' mean?

Switched Mode Power Supply.

Normally, the Maximum Rate for Charging / Discharging is at 1/10 of the AH value - for a 4.5 AH battery it would be 450 mA.

Ramesh

 

I suggest buying one of these:
http://www.ebay.com/itm/Buck-Conver...026?pt=LH_DefaultDomain_0&hash=item4d14bf09ea
They can be purchased quite inexpensively if you buy several of them at a time. I bought a lot of 10 of these for around $12 USD including shipping. It would probably cost more than that for me to build just one if I used a commercial board house.

 

Hey, Sarge ! Long time no see !!!