Current limitation on running lights? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 14 Old 12-14-2011, 08:19 AM Thread Starter
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Current limitation on running lights?

Currently I have an Eastern Beaver tail connector that splits the running lights/brake lights/turn signals OEM connector into external separate wires.

I plan to connect one device which will consume around 300mA (Micro Controller with 7 Leds) and also 12 non OEM Leds for the Coo Case (another 12*25mA = 300mA).
The micro controller will be using on the switched running lights.
The CooCase lights will be using Running Or Brake lights wires, depending whether brakes are used or no.

I do realize that for the Micro Controller a switched fuze box can be used, but if I don't have to spend more money and time on it, it is a better.

My question is:
How much more current (in mA) can safely be pulled from these wires - running lights and/or brake lights?

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post #2 of 14 Old 12-14-2011, 09:20 AM
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Greywolf will know, but another way is to check the gauge of the wires in question and what fuse is attached... You already know what these wires are powering, so from the gauge of wire and fuse attached, you will know how much more they (wires) can handle...

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Last edited by CanadianFZ6; 12-14-2011 at 09:25 AM.
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post #3 of 14 Old 12-14-2011, 09:46 AM
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You're talking about thousandths of an amp.

Here is a wire ampacity chart:
http://wiki.xtronics.com/index.php/W...Gauge_Ampacity

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post #4 of 14 Old 12-14-2011, 10:30 AM Thread Starter
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Quote:
Originally Posted by PTRider View Post
You're talking about thousandths of an amp.

Here is a wire ampacity chart:
http://wiki.xtronics.com/index.php/W...Gauge_Ampacity
Thanks, but I disagree - we are talking about six hundred thousandths of an amp, or 600mA which is 0.6A.
It is not a negligible amount of current.
I don't have the motorcycle's electric diagram - is there one fuse for running and brake lights? If so, is it a 2A fuse? Will the extra a 0.6 trip the fuse?

BTW: For some reason your link doesn't work - seems broken.

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post #5 of 14 Old 12-14-2011, 11:00 AM
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It's still a negligible amount. The signals and brake lights run off the 15A signals fuse. You're talking about an extra 8 watts when when brake and signal light filaments take 21W each with four filaments on when brakes and signals are on for a total of 84W out of 168 available at 80% capacity on the 15A fuse. In fact, the signals fuse also supports OEM heated grips when installed. I have no concerns about adding solid state devices and LEDs to stock wiring. It's only incandescents, motors and heated gear that get into big draws.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
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post #6 of 14 Old 12-14-2011, 11:22 AM Thread Starter
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Quote:
Originally Posted by greywolf View Post
It's still a negligible amount. The signals and brake lights run off the 15A signals fuse. You're talking about an extra 8 watts when when brake and signal light filaments take 21W each with four filaments on when brakes and signals are on for a total of 84W out of 168 available at 80% capacity on the 15A fuse. In fact, the signals fuse also supports OEM heated grips when installed. I have no concerns about adding solid state devices and LEDs to stock wiring. It's only incandescents, motors and heated gear that get into big draws.
Excellent! Exactly the info I was looking for.

As a side note: ("Energy Diet", continued from yesterday's MOSFET R/R discussion)
If 84W are used for lights (wow!), wouldn't the bike use less fuel and have a better MPG if all those lights are changed into LEDs, which are much more energy efficient?
EDIT: Assuming a MOSFET R&R is used, because now we all know that the extra watts are converted to heat with stock regulator if not used by bike.

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-----------------------------------------------------
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Last edited by BigMan73; 12-14-2011 at 11:28 AM. Reason: Added note
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post #7 of 14 Old 12-14-2011, 11:30 AM
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Brake and signal lights are not on that much. 35W HID headlights (40-44W actual draw) would probably have a bigger effect as they are always on but it's moot with the stock R/R. It's always at maximum output turning unused power to heat.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
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post #8 of 14 Old 12-14-2011, 11:58 AM
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I would get a choke line filter before the microcontroller

Do you have a good diagram/design for a solid state switching that will run off TTL. ??
I wanted to have control of these functions without using relays. I would hook up a STAMP (I like basic).

Like blowing the horn flashes the headlights. Brakes flash then go solid etc.
Turn signals are also 1/2 the brake lights

3rd electro analysis continues. The Shindengen is also a SHUNT type R/R I am trying to contact a couple of manufacturers re a series type R/R which is the type that shuts OFF the wave when it is above 14 V.
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post #9 of 14 Old 12-14-2011, 01:18 PM Thread Starter
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Quote:
Originally Posted by richw View Post
I would get a choke line filter before the microcontroller
What is a choke line filter, and why do I need that?
My power supply is regulated and has strong noise filters (capacitors) and a 14V Zener in front. A pretty robust design.
The regulator is designed for Automotive usage. Works great, I also turned on the engine while the micro controller was on, and not even a small hickup. Smooth power.

Quote:
Originally Posted by richw View Post
Do you have a good diagram/design for a solid state switching that will run off TTL. ??
I wanted to have control of these functions without using relays. I would hook up a STAMP (I like basic).
I am using Arduino. By TTL do you mean 5V logic? Arduino works with 5V, and it is very easy to program.

Coding is done in Wiring, which is C (and C++..) but with lots of easy to use libraries and a simpler syntax. You will have no problems, guaranteed.

Take a look at my Stromputer Project - lot's of information I put there, and feel free to ask me. https://www.stromtrooper.com/techy-wo...650-mk-1b.html
My Stromputer is already running off the bike's battery, and I can do anything I can dream of with it, because it is a full computer with input, output running on 16Mhz (My first PC was running of 4Mhz..)
There are many relays that can be controlled by the 5V output. Easy, and allows you to control high currents with a low current micro controller.
Skies are the limit...

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2011 DL-650A, Now owned by another stromtrooper
-----------------------------------------------------
Stromputer - https://www.stromtrooper.com/dl650-2004-2011/73806-stromputer-alive.html
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Last edited by BigMan73; 12-14-2011 at 02:16 PM.
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post #10 of 14 Old 12-14-2011, 02:14 PM
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Quote:
wouldn't the bike use less fuel and have a better MPG if all those lights are changed into LEDs, which are much more energy efficient?
Yes, but there are few LEDs that put out as much light as an incandescent bulb. And the few really good LEDs cost a lot. There are no LED headlight replacements yet. Superbright's best LED turn signal replacement bulbs were very disappointing--just not bright enough, and not nearly as bright as #3497 halogen bulbs.

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