Making a huge open filament lamp with a load of the LED filaments just seemed a logical thing to do. So here it is.
It uses a smoothed resistive dropper to run two circuits of four series LED filaments at just a couple of milliamps each to give the effect of a huge tungsten filament on support wires.
The circuitry is potted into a base from another LED lamp and has three solid core insulated wires (stripped from house wiring cable) which provide support, a common negative connection and two current limited positive connections to the zig-zagged filaments.
It should be noted that the solder connections on the filaments are live at nearly 300V DC and capable of giving a zing if touched.
Even at just a couple of milliamps, the light output is surprising.
It uses a smoothed resistive dropper to run two circuits of four series LED filaments at just a couple of milliamps each to give the effect of a huge tungsten filament on support wires.
The circuitry is potted into a base from another LED lamp and has three solid core insulated wires (stripped from house wiring cable) which provide support, a common negative connection and two current limited positive connections to the zig-zagged filaments.
It should be noted that the solder connections on the filaments are live at nearly 300V DC and capable of giving a zing if touched.
Even at just a couple of milliamps, the light output is surprising.
still awaiting for mine to turn up, on a ship from china, 2 more weeks
Almost looks like a Canadian maple leaf flag!
Looks like a BIG tungsten lamp filament.
That is nice, would have liked to see it in a ridiculously large bulb covering.
Clive, I don't care if it sounds weird, I love the way you say "zing" and I always will, thank you so much for all the wonderful informative videos, your knowledge and passion are an immeasurable inspration to so many, I wish you nothing but love and happiness forever you unique wonderful man x
Stick that inside a demi-john, and you've got the world's biggest glass envelope lightbulb, though I don't recommend using it in a pendant! Very night clubby indeed.
What's the power output?
I'd like to make a bulb somewhere around 5 watts or as high as I can reasonably take them for my surgeon's lantern.
Why don't you dip the exposed metal joints into epoxy?
Can you get led filaments alone in a pack? If so, where?
The fade out makes it look like a low voltage tungsten lamp.
I connected 5 LED filaments in series, housed them in a linear fashion, and am powering them with an old disposable camera flash assembly. There is approximately a 15 second lag as the capacitor is charging, but the system balances out rather well and maintains a steady light output powered by a single 1.5VDC D cell.