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		MP3Car.com > Mp3Car Technical > Hardware Development
12v PSU output

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08-13-2005, 02:52 PM	#1
daveg360 Newbie Join Date: Aug 2005 Posts: 44 My Photos: (0)	12v PSU output Can anyone see any problems with using the 12v rail from my M1 to power a circuit board I have cooked up. It has a bunch of relays that control an electric motor. I'm concerned about the inductive load dumping a load of power into the other items on the rail when it is shut off. Anyone got any thoughts? (The board controls the motorised screen I manufactured - I can supply a circuit diagram if anyone is interested)

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08-13-2005, 03:55 PM	#2
0l33l My Village Called 0l33l's CarPC Specs Join Date: Jul 2004 Location: Berkeley, CA Vehicle: 1995 Lexus SC300 1997 Mazda Miata Posts: 10,763 My Photos: (0)	shouldn't be a problem. __________________ PowerVoice v1 \| NaviVoice Source GammaControl v2.4 SKINbedder v3 1995 Lexus SC300 <-- Weekend Car 1997 Mazda Miata <-- Daily Driver

08-13-2005, 04:25 PM	#3
Jahntassa FLAC Jahntassa's CarPC Specs Join Date: May 2005 Location: Conyers, GA Vehicle: 2003 Pontiac Vibe GT Posts: 1,417 My Photos: (0)	As long as you're using the 12v to power the relay and NOT the motor itself, yeah.

08-14-2005, 06:32 AM	#4
daveg360 Newbie Join Date: Aug 2005 Posts: 44 My Photos: (0)	cheers guys!

08-14-2005, 11:21 AM	#5
Bugbyte Admin. Don't bug or I'll byte. Bugbyte's CarPC Specs Join Date: Sep 2004 Location: Corning, NY Vehicle: 2001 VW Beetle Posts: 4,470 My Photos: (19)	BTW if that's a home-brew motorized screen, I'd definately be interested in seeing how you did it. __________________ -Where in the world is the iBug? -Find out about theiBug -Attention Newbies! Have you seen the FAQ Emporium? -No time to figure it out? Take 5 minutes to view the Car PC 101 video

08-14-2005, 11:11 PM	#6
KyleYankan Maximum Bitrate Join Date: Mar 2005 Posts: 491 My Photos: (0)	Dont forget the diode across the relay. I did and fried my Mo-fo-Board

08-15-2005, 02:38 AM	#7
daveg360 Newbie Join Date: Aug 2005 Posts: 44 My Photos: (0)	Quote: Originally Posted by Bugbyte BTW if that's a home-brew motorized screen, I'd definately be interested in seeing how you did it. I'll take some pictures - having a bit of a nightmare with the limit switches but should have it done by the weekend

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