Hi:
I live off the grid (have for 40 years) all my lighting is 12 VDC LED. I recently picked up a really nice LED lamp at Goodwill. The lamp is powered at 120 VAC drawing 3.5 watts. When I removed the cover over the LED's I found 6 LED's mounted on a board with 2 wires soldered to it. (see photo). The 2 wires go to a little circuit board that I gather is a converter/rectifier, rectifying the AC voltage to DC and dropping the voltage to the appropriate amount for the LED's.
When I checked the voltage at the wires, I found it was 51.74 VDC. Since there are 6 diodes I figure each is drawing 8.62 VDC. I looked at the back of the board, to see how the diodes were wired, but it is just a solid piece of aluminum. Since there is just the 2 wires soldered to the board, does this mean the LED's are wired in series or parallel. Sorry I get confused by those terms.
My question: Can I cut the 2 wires loose from the converter/rectifier, put the appropriate sized resister on the positive lead and run the lamp off my 12 VDC system. What size of resister would I need?
I did something similar years ago with a pair of solar powered porch lamps, but then I was going from 4.5 VDC to 12 VDC and after a lot of reading I figured it out. LOL Any help on weather this is possible is greatly appreciated.
I live off the grid (have for 40 years) all my lighting is 12 VDC LED. I recently picked up a really nice LED lamp at Goodwill. The lamp is powered at 120 VAC drawing 3.5 watts. When I removed the cover over the LED's I found 6 LED's mounted on a board with 2 wires soldered to it. (see photo). The 2 wires go to a little circuit board that I gather is a converter/rectifier, rectifying the AC voltage to DC and dropping the voltage to the appropriate amount for the LED's.
When I checked the voltage at the wires, I found it was 51.74 VDC. Since there are 6 diodes I figure each is drawing 8.62 VDC. I looked at the back of the board, to see how the diodes were wired, but it is just a solid piece of aluminum. Since there is just the 2 wires soldered to the board, does this mean the LED's are wired in series or parallel. Sorry I get confused by those terms.
My question: Can I cut the 2 wires loose from the converter/rectifier, put the appropriate sized resister on the positive lead and run the lamp off my 12 VDC system. What size of resister would I need?
I did something similar years ago with a pair of solar powered porch lamps, but then I was going from 4.5 VDC to 12 VDC and after a lot of reading I figured it out. LOL Any help on weather this is possible is greatly appreciated.
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