Anders,

The Sparkfun "shifters" that I directed you to will do that. They'll actually do pretty much any voltage combo you like -- they're sourced from each drive side with a clever transistor array setup.

So, you can do:

- 12vdc serial to 5vdc
- 5vdc to to 3.3vdc
- 3.3vdc to 1.8vdc

Pretty much any esoteric combination in between.

If you know what you're doing, just the transistor array.

-marc

On 5/28/07, Anders Wallsson <diy@dslextreme.com> wrote:
Hi Dave
Can you recommend any voltage level converters?
It depends on what you're trying to do.
the gum needs to talk to another device that talks 0-5v TTL.

Ive a couple of 3v TTL <-> RS232 and 5v TTL <-> RS232 chips i can connect but that is gonna be a lot of components for little bang. Seems this might be common enough problem that people have created a dedicated chip for it.

cheers
Anders

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