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[ 6 posts ] |
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Tim
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Post subject: 5v Out Posted: Sun Jul 16, 2017 10:28 am |
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Joined: Tue Sep 13, 2016 9:06 am Posts: 78
ECU Model: S80 Pro
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Hi,
I'm working on a little project using a Teensy 3.2 dev board that can be powered from a 3.3 to 6v source. I wondered if it would be possible to use an S40's 5V Out to power this?
This would save me having to handle the +12v from an alternator.
Many Thanks
Tim
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Rob Stevens
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Post subject: Re: 5v Out Posted: Sun Jul 16, 2017 12:39 pm |
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Joined: Thu Jul 28, 2011 4:10 am Posts: 901
ECU Model: S100 Pro
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Yes would be fine I think but you should have some idea of how much current you need. Any thing over 0.5 amp would be wrong to my mind.
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stevieturbo
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Post subject: Re: 5v Out Posted: Sun Jul 16, 2017 4:17 pm |
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Joined: Tue Aug 02, 2011 12:08 pm Posts: 2947 Location: Norn Iron
ECU Model: No ECU
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Alex DTA
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Post subject: Re: 5v Out Posted: Mon Jul 17, 2017 4:36 am |
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Joined: Fri Feb 28, 2014 1:03 pm Posts: 1178
ECU Model: S40 Pro
Distributor: DTA
Firmware Version: 79
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Don't use the ECU 5v for that, it's only rated for sensor power. A few hundred milliamps, no more. You'd be better off with a cheap USB converter, as per Stevie.
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Tim
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Post subject: Re: 5v Out Posted: Mon Jul 17, 2017 4:37 am |
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Joined: Tue Sep 13, 2016 9:06 am Posts: 78
ECU Model: S80 Pro
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Thanks for the responses.
So technically it's possible, but not advisable. I guess if for whatever reason the Teensy draws huge current it could kill the sensor circuit. Not good.
I'll drop the idea of using the 5v and handle 12. Thanks for the links!
Tim
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mefmotorsport
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Post subject: Re: 5v Out Posted: Wed Jul 26, 2017 9:30 am |
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Joined: Mon Aug 01, 2011 6:45 am Posts: 507 Location: Lancashire
ECU Model: S100 Pro
Distributor: Mefmotorsport
Firmware Version: 79
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I use an old Blackberry phone charger, perfect for providing a good stable 5V supply up to 1 amp I think. You could probably also use any similar phone charger, Apple iphone or Samsung galaxy etc.
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