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battery box supplying 4 different voltages?

That's not hard to do. You can buy "Battery Eliminator Circuits", or BECs, from any of the R/C hobbyist suppliers. They take in a noisy

7 to 20VDC and output a clean 5VDC.

Here are some commercial units:

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Linear regulator with big heat sink for $9, switching regulator for $47. Choose based on how important battery life is in your application.

How much current do you need?

John Nagle

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John Nagle
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The only issue with 9 volt batteries is they have a pathetically small capacity - typically on the order of 150 mAh.

For $15 you can buy a nice switching regulator that is a plug-in replacement for a 7805...

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Later, Jon

-------------------------------------------------------------- Jon Hylands snipped-for-privacy@huv.com

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Project: Micro Raptor (Small Biped Velociraptor Robot)
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Jon Hylands

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