Light Source

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Light Source

Postby reshiram202 » Mon Nov 23, 2015 5:50 am

I plan on using a T14 Edison bulb with a spiral filament for my televisor's light source. Is it fine for me to use a LED driver for it or do I need a different circuit setup? Thanks.
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Re: Light Source

Postby Klaas Robers » Mon Nov 23, 2015 8:50 am

Jimmy, I suppose the Edison lamp is a neon lamp? Don't try to use a neon lamp. The disc with the small holes takes away so much light, that a neon lamp, which gives any way not so much light, will give you a VERY dim picture. Now that we have high brightness LEDs use them. In the end you will have a very bright "fire" burning behind the disc and still remain a low intensity picture. In my monitor I have 32 amber (orange) High Brightness LEDs in a small rectangle behind the disc. Lots of light, and still ...... It is well visible in a low level lighted room.
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Re: Light Source

Postby reshiram202 » Mon Nov 23, 2015 9:15 am

It is an incadescent bulb.I wanted to do this just because it would resemble a 1920's style televisor.
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Re: Light Source

Postby reshiram202 » Mon Nov 23, 2015 10:39 am

I was just wondering if it would be possible to use a regular LED Driver circuit for the light bulb.
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Re: Light Source

Postby McGee2021 » Mon Nov 23, 2015 10:56 am

It would be impossible to use a incandescent bulb. it does not have fast enough reaction time. Also, you cant use an led driver with any incandescent light source. the original televisor did not have an edison lamp, it had a flat plate neon lamp, and these are extremely hard to come by. i would just use an led array, but on my televisor i used a nixie tube. i would not suggest this, as it is also very dim
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Re: Light Source

Postby McGee2021 » Mon Nov 23, 2015 11:12 am

you could also look at the service manual for the original baird televisor. it may help you a bit.

You can find it here:
http://www.earlytelevision.org/pdf/baird_svc_manual.pdf
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Re: Light Source

Postby reshiram202 » Mon Nov 23, 2015 12:01 pm

Dang! Thanks for telling me before I bought it. Phew
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Re: Light Source

Postby reshiram202 » Mon Nov 23, 2015 12:12 pm

Would an LED edison bulb work? I REALLY don't want to solder an array of LEDs.
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Re: Light Source

Postby McGee2021 » Mon Nov 23, 2015 12:33 pm

It all depends on the wattage, the voltage, and the amperage intake of the bulb. it also depends on how close the leds on the bulb are. they must be extremly close. Another thing, you always have to put a difueser inbetween any disk and lightsource.
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Re: Light Source

Postby reshiram202 » Mon Nov 23, 2015 1:14 pm

The light gives off a pretty even glow. I can just use wax paper for a diffuser. The LEDs give off a very bright amber light as well. 4W.
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Re: Light Source

Postby McGee2021 » Mon Nov 23, 2015 1:18 pm

reshiram202 wrote:The light gives off a pretty even glow. I can just use wax paper for a diffuser. The LEDs give off a very bright amber light as well. 4W.


But what is the amperage? I would think that 4 watts would be to powerful. I should also be a small bulb, no bigger than 3 cm. What is the distance between the holes at the end of the spiral on your disk? The light should be about that big. I suppose that the bulb would be 120 or 240 volts, which is to high for any computer or CD player. I think you are talking about a bulb like this, which would be unsuitable.
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Re: Light Source

Postby reshiram202 » Mon Nov 23, 2015 1:43 pm

I will admit I know nothing of soldering so stringing LEDs is out of the question.
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Re: Light Source

Postby McGee2021 » Mon Nov 23, 2015 1:48 pm

reshiram202 wrote:I will admit I know nothing of soldering so stringing LEDs is out of the question.


Well, neither do I, but I try my hardest with available methods and get along very well.
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Re: Light Source

Postby McGee2021 » Mon Nov 23, 2015 1:59 pm

Another possible light source could be an mini led matrix of of eBay.
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Re: Light Source

Postby reshiram202 » Mon Nov 23, 2015 2:22 pm

My image is about 1 1/4 cm. Wouldn't an LED 8x8 matrix be too much?
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