Thread: Coding question
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      05-09-2012, 09:04 PM   #3
GenePoole
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Drives: '06 E90 330i
Join Date: Apr 2010
Location: Brighton, IL

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I have a 50 amp power supply with an amp meter. With ignition on and everything settled down it draws about 15-20 amps so I would expect 20 amp to be the minimum to maintain a constant voltage. It will draw 40-45 amps when first connected and ignition first turned on and settles down in about 5 minutes or so. It will probably take longer to settle with a power supply with less total amperage than mine. Make sure it's regulated or it'll probably smoke itself.

As ******* says, you don't really need one for coding; only for programming where a single session can take hours. You'll want a constant voltage that whole time.