I have 2 of solar-charged motion-detecting LED safety lights. The battery in 1 already died and I assume the other will do soon. I don't want to spend money for new batteries as I don't need the lights that much, but hate to dispose some good technology. So I am thinking about putting those 2 in the row and make RV emergency lights with them, but when I open the box, I found maze of wires with 2 electronic boards. When 1 board is for motion sensor, the other seems to control the battery and solar charger. Either way, that is above my electronic knowledge, so maybe somebody knows if just cutting the wires for the LED and hooking them directly to power source will make them work?

I Would not recommend it. If the two light assemblies are exactly the same voltage ... They it will work. Else it won't.now there is a device called a DC-DC converter. this takes 12vdc and depending on the type can make it most anything you need... In this case you need a "Buck" type unit makes six out of 12.or the proper resistor. but the DC-DC Converter...... Better. A few dollars at All Electronics dot com.

You can buy 2x 80W 12V LED flood lights for $18 but what fun is that?I converted a small 120V LED sewing machine light to 12V. LEDs are about 3V each so 4 in series works on 12V DC. I modified the wiring to connect groups of 4 in parallel. I was left with a group of 3 to which I added a resistor.

> Do you think I can use 2 of 6V LED in the row with 12V.Yes I would give it a go. Don't bypass any internal voltage regulator. If they really are 6v LED lamps then it will work fine. But even the typical RV replacement lamp is regulated to work from about 10 to 30 volts.

CA Traveler wrote:You can buy 2x 80W 12V LED flood lights for $18 but what fun is that?I converted a small 120V LED sewing machine light to 12V. LEDs are about 3V each so 4 in series works on 12V DC. I modified the wiring to connect groups of 4 in parallel. I was left with a group of 3 to which I added a resistor.Hey, thanks for the idea. The light has 60 LEDs and I open the back to find they are soldered in couples. The 2 solders close together is the LED and inside big loops you see small bridges making couples. Now with 108F weather, I had good Margarita today, so can't think where to cut the circuit and re-solder it for 12V, but will let you know how it works tomorrow. Click For Full-Size Image.

Do you think I can use 2 of 6V LED in the row with 12V.

14 Replies

Kayteg1
Explorer II
Jun 05, 2019
CA Traveler wrote:
You can buy 2x 80W 12V LED flood lights for $18 but what fun is that?

I converted a small 120V LED sewing machine light to 12V. LEDs are about 3V each so 4 in series works on 12V DC. I modified the wiring to connect groups of 4 in parallel. I was left with a group of 3 to which I added a resistor.

Hey, thanks for the idea.
The light has 60 LEDs and I open the back to find they are soldered in couples.
The 2 solders close together is the LED and inside big loops you see small bridges making couples.
Now with 108F weather, I had good Margarita today, so can't think where to cut the circuit and re-solder it for 12V, but will let you know how it works tomorrow.

Click For Full-Size Image.
time2roll
Nomad
Jun 05, 2019
> Do you think I can use 2 of 6V LED in the row with 12V.

Yes I would give it a go. Don't bypass any internal voltage regulator. If they really are 6v LED lamps then it will work fine. But even the typical RV replacement lamp is regulated to work from about 10 to 30 volts.
CA_Traveler
Explorer III
Jun 05, 2019
You can buy 2x 80W 12V LED flood lights for $18 but what fun is that?

I converted a small 120V LED sewing machine light to 12V. LEDs are about 3V each so 4 in series works on 12V DC. I modified the wiring to connect groups of 4 in parallel. I was left with a group of 3 to which I added a resistor.
wa8yxm
Explorer III
Jun 05, 2019
I Would not recommend it. If the two light assemblies are exactly the same voltage ... They it will work. Else it won't.

now there is a device called a DC-DC converter. this takes 12vdc and depending on the type can make it most anything you need... In this case you need a "Buck" type unit makes six out of 12.

or the proper resistor. but the DC-DC Converter...... Better. A few dollars at All Electronics dot com.

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Do you think I can use 2 of 6V LED in the row with 12V.

14 Replies

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