MFU Upgrades for extra (chicken)lights

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MFU Upgrades for extra (chicken)lights

Postby Marten77 on Sat Oct 10, 2009 3:32 am

Hello @ All,

I don't use a MFU for myself, but hopefully I can help you with some upgrade ideas...

The (light)outputs from the MFU don't give enough power to connect many LED's trow it.
It's easy and safe to do it this way:
Image
(Bat1 can be 6V - 12V)

If the LED from the Optocoupler is activated, the photo-transistor will switch on...
When this happens, the extra transistor get his power through that photo-transistor...
And will switch on the Load (chicken-lights ore something else).

This upgrade is a low-cost and it's easy to setup.
If someone need some help, just let it now :wink:

I also have made a PCB for this part:
Image
Sizes are: 31x12x10mm (LxWxH)

This PCB is coming with my next PCB order.
(end of October)

Edit: With a small correction on this print, it's possible to combine the direction-lights together with the rear/break-lights.
This can be used for American trucks ore trailers.

A second upgrade is for the back- and break-lights...
Now they working with one single LED, but European trucks and trailers using it separated !
Also American trailers can use this, to connect extra chicken-lights.
I'm still in process to filter this out and let it work with two separate outputs.

The MFU is using a PWM (Puls-Width-Modulation) signal for the rear/break-light outputs.
I was thinking to try it like this:
Image
(Bat1 can be 6V - 12V)

R1 is minimum 10K maybe it must be higher.
This makes the opto-coupler more sensitive.

With R2 you can select the level, where Load-1 must go on.
And with R3 the same for Load-2.
If R3 is set to a higher level as R2, then Comp.2 is turning on later then Comp.1.

Load-1 = Rear-lights/chicken-lights
Load-2 = Breaking-lights

Because I don't have a MFU, I have ordered a 3Racing light-set.
This works the same like a MFU...(the light-functions)
Now it's waiting till the 3Racing set is arrived and I can give it a try :woohoo

Comments ore more ideas are welcome :winkbig
Best regards,
Marten

Here you will find mine Youtube-Channel
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Re: MFU Upgrades for extra (chicken)lights

Postby TRDSport on Mon Oct 12, 2009 8:46 pm

Marten-

Thanks for the great ideas, always nice having guys sharing great ideas like these!!

Jerry
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***JERRY***
-Founder- -Midwest Model Trucking-
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jerry@mwmodeltrucking.com
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Re: MFU Upgrades for extra (chicken)lights

Postby Marten77 on Sat Oct 24, 2009 1:59 am

Hello @ All,

I still don't get that 3Racing set here, so I have programmed a microprocessor to play a simulation.
The micropr. is just jumping (in repeat) from 40% output, 100% output and Off.

With the old plan it works, bud it needed some updates.
Here the new plan:
Image

There are two more components needed, and that are C1 and R7.
The comparator is to sensitive with a PWM signal, when the level is @ 40%.

There are 4 components marked with a "?"...
For that components, I don't now yet the value's for a MFU ore a 3Racing set.
With my test-setup I use this:
R1 = 270R
R4 = 15K
R7 = 10K
C1 = 47uf (must be a smaller value, 1uf - 10uf !)

Sorry for the ones how don't understand this. :scratch
But this job must be don first, for it will work properly. :hmmm
Best regards,
Marten

Here you will find mine Youtube-Channel
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Current Projects: Some electronic modules for my trucks.

Re: MFU Upgrades for extra (chicken)lights

Postby Marten77 on Sun Nov 15, 2009 1:04 pm

Hello All,

For some reason the 3racing led-controller didn't work with my radio...
I have sent it back to stellamodels, to make sure the controller was OK ore not...
They told me, the controller works fine... (on a basic 2ch radio)

They have refund me my money (great service !)

Till now I can't check the function for the rear/break-light split-upgrade.
Maybe I can use a MFU from a other person, when there is a meeting...

I will come back later on this point...
Best regards,
Marten

Here you will find mine Youtube-Channel
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Current Projects: Some electronic modules for my trucks.

Re: MFU Upgrades for extra (chicken)lights

Postby blazersport4x4 on Thu Jun 17, 2010 8:33 pm

has anyone built the first circuit to add lights to an MFU?
Last edited by blazersport4x4 on Fri Jun 25, 2010 2:32 pm, edited 1 time in total.
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Re: MFU Upgrades for extra (chicken)lights

Postby blazersport4x4 on Mon Jun 21, 2010 3:59 pm

has anyone tested this circuit with the MFU?
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Re: MFU Upgrades for extra (chicken)lights

Postby aussietruckerdude on Sat May 28, 2011 10:45 pm

I have and cant get it to work ( might be by crappy soldering skills )..... :scratch :scratch :scratch :scratch
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