Wiring a battery powered LED onto a snowblower - Snowblower Forum : Snow Blower Forums
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post #1 of 22 Old 07-22-2018, 11:37 AM Thread Starter
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Wiring a battery powered LED onto a snowblower

I have an older snowblower that does not have a generator, and I would like to figure out how to wire in an LED light, using my Ryobi string trimmer 40V battery. The battery is obviously unused in the winter, so I figure I'd put it to use. My thought is to configure a battery mount under the control panel, and use the removable battery when it gets dark outside.

I know very little about LEDs, aside from the fact that they are DC, are polarized, and require less voltage than incandescents. Will it be as simple as figuring how much to knock down the voltage with a resistor, and then wiring that in series?

The battery I have is a Ryobi OP4026 Li-ion 40v 93.6 Wh.

Here is one type of light I am considering:


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post #2 of 22 Old 07-22-2018, 12:01 PM
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Much less work just to mount a couple of those miner light things. Third winter on mine and still the same aaa batteries.



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post #3 of 22 Old 07-22-2018, 02:00 PM
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Quote:
Originally Posted by thool View Post
I have an older snowblower that does not have a generator, and I would like to figure out how to wire in an LED light, using my Ryobi string trimmer 40V battery. The battery is obviously unused in the winter, so I figure I'd put it to use. My thought is to configure a battery mount under the control panel, and use the removable battery when it gets dark outside.

I know very little about LEDs, aside from the fact that they are DC, are polarized, and require less voltage than incandescents. Will it be as simple as figuring how much to knock down the voltage with a resistor, and then wiring that in series?

The battery I have is a Ryobi OP4026 Li-ion 40v 93.6 Wh.

Here is one type of light I am considering: https://www.amazon.com/Light-Northpo...08/ref=sr_1_14
The lights you refer to are spec'd at 10-30 volt dc and 27 Watt each. with these kind of specs, I really have no way to know where is the 27 W is specified ie: at 10 volt, at 30 volt, or somewhere in between.
If you connect them in series across your 40 volt battery, each one of the lights will use 20 Volt, which falls within the 10 to 30 volt spec. no resistor needed
If you want to hook them up in parallel, you will have to drop the voltage to the LEDs, the resistance will be relatively low, but you will need a HIGH power resistor.( to get 27 Watt at 20 volt you will be drawing 1.35 Amp. each (2.7 Amp total from the battery) the resistor will be 7.5 Ohm at a , more than 55 Watt minimum. that is a pretty hefty resistor.
If you want to figure out the resistance, current, and power : http://www.ohmslawcalculator.com/ohms-law-calculator
HTH
JerryR

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Last edited by JerryR; 07-22-2018 at 02:08 PM.
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post #4 of 22 Old 07-22-2018, 04:32 PM
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If you really want to use the string trimmer battery, I'd do what JerryR says. Wire them in series, so each light gets 20V.



But that battery might be a bit overkill, and expensive if it got damaged from getting wet from snow, etc. Definitely put a fuse in with your positive wiring! 5A, maybe 10A, depending on the draw of the lights. If something bad happened with wiring (like a short), a lithium battery will dump a LOT of current, and the battery can catch on fire, if the short continued.



Also, I don't know whether the battery itself has a low-voltage shutoff function, or whether the devices do (often it's part of the battery, as it's intended to protect the battery itself). But if you over-discharge a lithium battery, that can damage the battery. Usually there are safeguards to avoid this, but you're talking about using it a little differently, not in the normal pairs of batteries & devices, so it's conceivable that you could lose some of those protections.



But I think this may be a significantly more-complex solution that might be really required.



We have 2 of these, they're great:





And they're useful for lots of other things, too. The benefit here would be getting light where you're looking, vs where the machine is aiming.



I have 3 of these mounted on the front of my lawn tractor, to supplement its headlights. From Harbor Freight:

https://www.harborfreight.com/144-lu...ght-63601.html


They're not fancy, but they put out a decent amount of light, and again, just needed to be mounted, no wires. They're still on the included AAA batteries, after a few seasons (granted, they only get used for the last mows of the season, when it's getting dark early).



If you really want to use big, wired-in lights, you could also just use a cheap lead-acid 12V battery, even a sealed one. You'll still need to recharge it after uses, it won't have as much capacity as your lithium battery, etc. But it's cheap, and less risky, if something went wrong.

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post #5 of 22 Old 07-22-2018, 04:40 PM
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For battery power options I'm with nwcove for the practicality factor of a miner-style light. I have one of these I use for a variety of tasks.


Dont be afraid to look at the hundreds of available options from the bicycling world. Handlebar mounting. Rechargeable batteries that fit in a water bottle holder (easy to adapt to mounting on a SB) for easy removal to take inside and charge before the next storm.
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post #6 of 22 Old 07-23-2018, 08:58 PM Thread Starter
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I'm glad I checked here! Turns out the bike headlights would be perfect. For example,


has a head mount as well as other mounting options. I do nighttime plowing maybe 10-15 times, so this would be perfect. Plus, I'm sure I can find summer uses as well.
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post #7 of 22 Old 08-01-2018, 04:18 AM
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This would be nice if I was in your shoes, but more expensive.
Buy a battery tray for a small 12v lawn tractor or lawnmower sized battery. Mount the battery tray behind the bucket near the tire. Place the battery in the tray. The batteries are around $45.
Mount nice Amazon priced lights on the snowblower. Use a trickle charger between uses to keep the battery on board at full power.

That little 12 volt tractor battery would light your way for hours using LEDS.

Bob
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post #8 of 22 Old 08-02-2018, 10:07 PM Thread Starter
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Quote:
Originally Posted by Ariens hydro pro View Post
This would be nice if I was in your shoes, but more expensive.
Buy a battery tray for a small 12v lawn tractor or lawnmower sized battery. Mount the battery tray behind the bucket near the tire. Place the battery in the tray. The batteries are around $45.
Mount nice Amazon priced lights on the snowblower. Use a trickle charger between uses to keep the battery on board at full power.

That little 12 volt tractor battery would light your way for hours using LEDS.
This was actually my first thought, then I considered a lithium ion, being smaller. Just for convenience and portability, I'm going to look into the rechargeable bike headlight, so I can keep it topped off with a USB charger indoors, and then just snap it into place when I use it at night.
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post #9 of 22 Old 08-31-2018, 01:18 PM
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I used a 12v Dewalt battery from an old cordless impact. Runs my LED light, along with a linear actuator for tilting my chute. Iíll try and get some pictures.
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post #10 of 22 Old 09-18-2018, 07:44 AM
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Quote:
Originally Posted by dooitorbust View Post
I used a 12v Dewalt battery from an old cordless impact. Runs my LED light, along with a linear actuator for tilting my chute. I’ll try and get some pictures.
Would love to see some photos of your setup.

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