Wiring a LM137T

Jake_Biggs · Post by **Jake_Biggs** » Sat Apr 07, 2007 6:03 pm

I think that's what it's called. i'd heard of it around here before, but cant find a good schematic. I need to have it wired to knock down 7.2 volts to 3.3 or equivalent. i have searched the forums and havent found any relavent information. ive had an n64 mobo kicking around for quite some time (>2 years<), and decided to make it a self-contained console. i havent purchased a good battery pack yet, i'd been using 3 Ni-MH AA's and a 9.6v rc pack to run this. any help is greatly appreciated.

jeroen · Post by **jeroen** » Sat Apr 07, 2007 6:08 pm

Well look for a datasheet. There should be info in there

Kurt_ · Post by **Kurt_** » Sat Apr 07, 2007 6:09 pm

It's the L---- the something you order a free sample of from TI? Pre-assembled and ready to go?

Jake_Biggs · Post by **Jake_Biggs** » Sat Apr 07, 2007 6:22 pm

no, i bought it from rat shack. i'll go in my garage to get the exact name.

ah, LM317T. it looks like a 7805.

ive looked for datasheets on it, but i cant figure out how to get 3.3 volts. has anyone here used this?

Post by **Skyone** » Sat Apr 07, 2007 7:43 pm

R1 = 240 Ohm
R2 = ~400 Ohm
C1 = 1uF
C2 = 0.1uF
______________

Output = 3.33v

Voila!

Jake_Biggs · Post by **Jake_Biggs** » Sun Apr 08, 2007 3:10 pm

ooh boy, THAT's what i need to see. as soon as i get the parts, i'll rig it up. thanks skyone!