What voltage converter chip would you recommend from going  5 volts to 3.3 volts.

On 3/15/07, Alex Haack <haackbus@gmail.com > wrote:
It is a Parallax Inc RFID reader running at 2400bps baud

On 3/15/07, Dave Hylands <dhylands@gmail.com > wrote:
Hi Alex,

On 3/15/07, Alex Haack < haackbus@gmail.com > wrote:
> The audiostix 2 have 3.3v logic level serial interfaces, so when hooking up
> a 5v logic level serial device, do I need to use a converter, or convert the
> 5v to 3.3v.  If I do need to use a converter, how could I make one.

You definitely need a converter.

The 3.3v Tx from the gumstix going into the 5v Rx may work fine with
no conversion.

Depending on the baud rate, you might be able to get away with a
resistor divider network in the other direction.

There are lots of voltage conversion chips available, it just depends
on how much you want to spend, how big you want it, and how much extra
circuitry you want.

Dave Hylands
Vancouver, BC, Canada

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