Using the Eleven in automotive application

The "Eleven" is our Uno-equivalent Arduino-compatible board, but with a number of improvements including prototyping area, a mini-USB connector, LEDs mounted near the edge, and the D13 LED isolated using a FET. [Product page]
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ozwolf
Posts: 4
Joined: Sat Jan 11, 2014 10:44 am

Using the Eleven in automotive application

Post by ozwolf » Mon Sep 01, 2014 12:40 am

Hi All,

Did a quick search but couldn't find the answer to my questions.

Will supplying 14.7vdc (nominal charge voltage of VW Golf GTI) be a long term problem?

The application is we've used an Eleven with SeeedStudio CanBus shield, and will be connecting a 7 segment display to show the gear (P,r,n,1,2,3,4,5,6) to DSG transmission is in.

Eleven specs show preferred power supply of 7 to 12 vdc. However, 6 - 20vdc is acceptable. See page 2 of attachment
Eleven_Getting_Started_v1_0_b.pdf
(121.26 KiB) Downloaded 207 times
.

Thank you in advance for any advice.
Last edited by ozwolf on Mon Sep 01, 2014 11:39 am, edited 1 time in total.

angusgr
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Re: Using the Eleven in automotive application

Post by angusgr » Mon Sep 01, 2014 1:08 am

Hi ozwolf,

The Eleven's VIn should accept 14.7V just fine. Just be sure the board doesn't get too hot - the voltage regulator will dissipate more heat with a higher input voltage, so it will need to be in a reasonably ventilated area.

The voltage regulator (part that may get hot) is the large component adjacent to the DC In jack.


Angus

Brissieboy
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Joined: Fri Sep 20, 2013 7:25 am

Re: Using the Eleven in automotive application

Post by Brissieboy » Mon Sep 01, 2014 4:39 am

ozwolf,

You need to remember how harsh the electrical environment is in a vehicle. There are HUGE spikes on the 12V supply rail, big differences in ground potential, and the very real possibility of big spikes on any connection you make external to your circuitry.

Please do a little research on protection. You will definitely need it.

ozwolf
Posts: 4
Joined: Sat Jan 11, 2014 10:44 am

Re: Using the Eleven in automotive application

Post by ozwolf » Wed Sep 03, 2014 11:02 pm

angusgr wrote:Hi ozwolf,

The Eleven's VIn should accept 14.7V just fine. Just be sure the board doesn't get too hot - the voltage regulator will dissipate more heat with a higher input voltage, so it will need to be in a reasonably ventilated area.

The voltage regulator (part that may get hot) is the large component adjacent to the DC In jack.


Angus
Thank you Angus, that's what I was hoping for. Just to be sure, I'll hook up a temperature probe, and log some temperatures.

ozwolf
Posts: 4
Joined: Sat Jan 11, 2014 10:44 am

Re: Using the Eleven in automotive application

Post by ozwolf » Wed Sep 03, 2014 11:04 pm

Brissieboy wrote:ozwolf,

You need to remember how harsh the electrical environment is in a vehicle. There are HUGE spikes on the 12V supply rail, big differences in ground potential, and the very real possibility of big spikes on any connection you make external to your circuitry.

Please do a little research on protection. You will definitely need it.
Thanks Brissieboy, fair comment. Will do.

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