LED Headlight Bulbs

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inairam
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Tractors Owned: 1948 with international 1000 loader
1949 with kub klipper belly mower.
1957 with c-2 mower & c-54 grader blade
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Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
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Re: LED Headlight Bulbs

Postby inairam » Fri Jul 28, 2017 7:24 am

I did see a change in light output with a change in current but as you said they are plenty bright and more current will make the heat problem worse.

the incandescents are 5 amps calculated ( 6v 30 watt .) This set up is ~1/2 the current more than twice the light and better color range. nice.
When you only have 9 horsepower you need to know the names of all of the ponies!

Jim Becker
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Re: LED Headlight Bulbs

Postby Jim Becker » Fri Jul 28, 2017 11:18 am

Urbish wrote:The boost converter gets pretty hot (designed to do so).

How hot is hot? You may be able to attach it to the inside of the headlight shell so the shell acts somewhat as a heat sink. You might be able to mount it under the hood, above/beside the radiator shroud. Unfortunately, you would need to expect anywhere near the radiator to be a 200 or so degree environment which may be too hot for the device.

Inside the headlight housing is a pretty safe place for water protection. Unfortunately, nearly anywhere else on the tractor isn't as well protected and you need to deal with weatherproofing the device.

I'm sure you are already thinking about all this.

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Urbish
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1947 Farmall H
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Location: Manchester, MI

Re: LED Headlight Bulbs

Postby Urbish » Fri Jul 28, 2017 12:18 pm

I have the aftermarket rubber headlight housings, so they won't transmit very much heat. Maybe I can tuck them between the grille screen and the radiator. At least that way they will be bathed in a flow of 'cool' air. I have some heat-sinks that I can attach to the MOSFET on each board. I think I'll design and 3D print some enclosures that allow the heat sink to stick out, and caulk all the seams to keep moisture out.

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Urbish
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Posts: 1115
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
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1948 Farmall Cub
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
Circle of Safety: Y
Location: Manchester, MI

Re: LED Headlight Bulbs

Postby Urbish » Sat Jul 29, 2017 2:09 pm

It appears that this approach will be a bust. Between the heat being given off by the LED light and how hot the boost converter gets, there's no way any of this will last sealed up in the headlight housing without having a meltdown. The lights are great, but I'm going to go with a more expensive 6V to 12V converter that can be mounted further up the line and is sealed against the elements. This one looks like it might be a winner, and can power both lights: https://www.amazon.com/DIGITEN-Converter-Regulator-Waterproof-Module/dp/B019GY2FLW

inairam
501 Club
501 Club
Posts: 635
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 with international 1000 loader
1949 with kub klipper belly mower.
1957 with c-2 mower & c-54 grader blade
1965 lo-boy with c-3 mower
1975 with homemade mower
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: LED Headlight Bulbs

Postby inairam » Sat Jul 29, 2017 5:04 pm

that one does not also reverses polarity and the larsens do not work reversed

this one steps up and revereses.

http://www.ebay.com/itm/232425795073
When you only have 9 horsepower you need to know the names of all of the ponies!

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Urbish
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Posts: 1115
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1948 Farmall Cub
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
Circle of Safety: Y
Location: Manchester, MI

Re: LED Headlight Bulbs

Postby Urbish » Sun Jul 30, 2017 7:01 am

As long as there are four wires coming out of it, all I have to do to reverse polarity is connect the red wire to ground instead of the black.

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Urbish
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Posts: 1115
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
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1948 Farmall Cub
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
Circle of Safety: Y
Location: Manchester, MI

Re: LED Headlight Bulbs

Postby Urbish » Wed Aug 16, 2017 1:18 pm

I finally finished up with the wiring on these. They work GREAT! I can illuminate the house from 300'.

Here's the 6V to 12V converter I ended up with.

Image
$28.99 from Amazon.com https://www.amazon.com/DIGITEN-Converter-Regulator-Waterproof-Module/dp/B019GY2FLW

The tractor is 6V positive ground. On the input side, I connected the positive to ground and the negative to the headlight out terminal on the rotary switch. On the output side, I connected the negative wire to the existing headlight wire running to the front and ran a new wire for the positive with a Y-splice near the radiator to follow the existing wiring harness. I 3D printed a mount for the converter that uses two #8-32 pan head screws to mount (using hex shaped pockets in the mount to capture the hex nuts). The mount attaches by using longer bolts where the dash attaches to the clutch housing.

Note, you cannot share a common ground with this converter (by connecting the black leads together and attaching them to ground). This converter achieves the step-up in voltage by sending high frequency pulses of 12V to the output leads. Joining the grounds goofs up the high speed switching. EDIT: This means that the wiring forward of the converter needs to be completely isolated from the chassis of the tractor.

Interestingly enough, using the lights on the "low" setting of the rotary switch causes the headlights to strobe at about 10 flashes per second. I imagine that doing this too long will burn something up. I think I'll remove the resistor wire at the rotary switch so that "low" has no function whatsoever.

All in all, I'm very happy with the result.
Attachments
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Last edited by Urbish on Wed Aug 16, 2017 1:50 pm, edited 1 time in total.

Jim Becker
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Re: LED Headlight Bulbs

Postby Jim Becker » Wed Aug 16, 2017 1:33 pm

Looks good. You got it accomplished for a tolerable price. I read your output wiring description that you have to totally isolate it from the rest of the tractor -- just one wire to each side of the lamp and no ground connection.

You could jumper the resistor wire on the switch so Low becomes the same as High. You could feed your converter from the rear light terminal of the switch. That would also feed the full 6 volts to the converter in both the L and H positions.

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Urbish
501 Club
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Posts: 1115
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1948 Farmall Cub
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
Circle of Safety: Y
Location: Manchester, MI

Re: LED Headlight Bulbs

Postby Urbish » Wed Aug 16, 2017 1:37 pm

Jim Becker wrote:I read your output wiring description that you have to totally isolate it from the rest of the tractor -- just one wire to each side of the lamp and no ground connection.


Yes, the headlights are on their own circuit directly back to the converter, completely isolated from the rest of the tractor

Jim Becker wrote: You could jumper the resistor wire on the switch so Low becomes the same as High. You could feed your converter from the rear light terminal of the switch. That would also feed the full 6 volts to the converter in both the L and H positions.


Good suggestions and easy enough to do any of them. Hardest part was trying to do the wiring without removing the hood. Once I bit the bullet and removed the hood, the rest was a piece of cake.

Jim Becker
Team Cub
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Posts: 13044
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: LED Headlight Bulbs

Postby Jim Becker » Wed Aug 16, 2017 2:18 pm

If you'd had a Touch-Control system, the part behind the panel would have been difficult even with the hood off.

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Urbish
501 Club
501 Club
Posts: 1115
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1948 Farmall Cub
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
Circle of Safety: Y
Location: Manchester, MI

Re: LED Headlight Bulbs

Postby Urbish » Wed Aug 16, 2017 4:54 pm

If there is interest, I can make the adapter available to order from Shapeways.com. Maybe I can design up another one that is compatible with the touch control too.

inairam
501 Club
501 Club
Posts: 635
Joined: Wed Jul 08, 2015 10:24 am
Zip Code: 19342
Tractors Owned: 1948 with international 1000 loader
1949 with kub klipper belly mower.
1957 with c-2 mower & c-54 grader blade
1965 lo-boy with c-3 mower
1975 with homemade mower
Memberships: Rough and Tumble Engineers Historical Association;Chapter 8 IH Collectors; IH Collectors Worldwide
Circle of Safety: Y
Location: Glen Mills PA

Re: LED Headlight Bulbs

Postby inairam » Thu Aug 17, 2017 5:45 am

nice job
When you only have 9 horsepower you need to know the names of all of the ponies!

User avatar
Urbish
501 Club
501 Club
Posts: 1115
Joined: Sat Sep 07, 2013 3:45 pm
Zip Code: 48158
Tractors Owned: ~
1948 Farmall Cub
1947 Farmall H
1946 Farmall B
1953 Willys CJ3B
Circle of Safety: Y
Location: Manchester, MI

Re: LED Headlight Bulbs

Postby Urbish » Fri Dec 15, 2017 9:13 am

In case it's helpful to anybody, here is a wiring diagram for the Larsen LED headlights with the 6V to 12V converter. It is a very simple install from a wiring standpoint:
Attachments
12 Larsen Light LED Wiring.JPG


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