# Idea for EM-406 and 3.3v

**URL:** <https://community.sparkfun.com/t/idea-for-em-406-and-3-3v/2708>\
**Category:** Development Boards\
**Created:** [September 17, 2006, 11:08am UTC](https://community.sparkfun.com/t/idea-for-em-406-and-3-3v/2708 "2006-09-17T11:08:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![technolog](https://avatars.discourse-cdn.com/v4/letter/t/59ef9b/32.png) [@technolog](https://community.sparkfun.com/u/technolog)\
**Post date:** [September 17, 2006, 11:08am UTC](https://community.sparkfun.com/t/idea-for-em-406-and-3-3v/2708/1 "2006-09-17T11:08:06Z")

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Hi

Forgive for my English.

In my project I connect GPS EM-406, mC AVR (M16) and radio modul RC1240.

I would like Use Li battery as power supply via 3.3 LDO regulator, but voltage for EM-406 is 4.5-6.5 V.

On the back side of board EM-406 is built in voltage regulator (3.3V).

If I bypass this regulator, I can connect EM-406 to external

3.3v regulator.

That you think of my idea?

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**Author:** ![leon\_heller](https://yyz1.discourse-cdn.com/sparkfun/user_avatar/community.sparkfun.com/leon_heller/32/7602_2.png) [@leon\_heller](https://community.sparkfun.com/u/leon_heller)\
**Post date:** [September 17, 2006, 11:21am UTC](https://community.sparkfun.com/t/idea-for-em-406-and-3-3v/2708/2 "2006-09-17T11:21:50Z")

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You could use a suitable boost converter to get 5V from the battery, Maxim makes them.

Leon

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**Author:** ![daemondust](https://avatars.discourse-cdn.com/v4/letter/d/c68b51/32.png) [@daemondust](https://community.sparkfun.com/u/daemondust)\
**Post date:** [September 17, 2006, 12:59pm UTC](https://community.sparkfun.com/t/idea-for-em-406-and-3-3v/2708/3 "2006-09-17T12:59:30Z")

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For what it’s worth, I haven’t had any problems powering mine directly from 3.3v.