DIY Video Projector - Page 19

Type-E · 31st October 2001, 02:20 PM

dwalls32, how strong is your flashlight that you was using for the test? Is the idea of LEDs still possible?

dwalls32 · 31st October 2001, 02:55 PM

It's a 1,000,000 candle flood light. It is bright, but only in the center of the beam. Outside of that, it gets too dark to cut through the panel. I need a "flat" light...

Type-E · 31st October 2001, 08:49 PM

Oh ic.. do you think it's possible to use car headlights? There are white lights that is extremely bright.

dwalls32 · 31st October 2001, 09:04 PM

Well, this is where I could use some electronics help. Vince, I bought the same powers upply you did for leds. It's 12v 47 watt. I bought a big halogen car high beam. It's 12 volt, 50 watt. I hooked it up to the power supply and can get light, but it's not bright at all. I'm sure I don't know how to hook it up correctly. Anyone?

Helix · 31st October 2001, 09:32 PM

light conversions :

1 flame = 43.05564 meter candles
1 foot candle = 10.76391 meter candles
1 lux = 1 meter candles
1 foot candle=0.25 flame

Type-E · 1st November 2001, 01:31 AM

but then, how does it convert to ANSI Lumens?

About your power supply, I think it just doesn't have enough power. Why don't you try using the computer's power supply, the yellow wire is 12V but I don't k now how much current it has.

Gunawan W · 1st November 2001, 05:43 AM

Great work dwalls32, now we know it really works!

btw, I just read Popular Mechanics, Oct 2001 issued,
page 117, an ad about flashlight using 4 led's.
They said its beam can be seen from a mile away.
maybe this type of led could work for our project.

Myren,
there was someone who did the same way (ohp and lcd monitor):

http://www.avsforum.com/avs-vb/showt...&highlight=OHP

to cooling down lcd panel,
I saw product demo before, about clear laminated sheet (V-KOOL ?),
They laminate a piece of glass and beamed with very hot lamp
(it'll fry your hand in second), but behind the glass you can't
feel any heat!

dwalls32,
you can't use that power supply, its defenetely not enough power.
rule of thumb you should double the power needed.
why don't you use 12 volt car battery just for trying, before you find the right power supply. (cheap OHP trafo can be use for it)
Don't forget using reflector behind the lamp, its really important to beamed the light.
maybe worth to try 150 watt Xenon bulb type, it's real white light.

dwalls32 · 1st November 2001, 06:18 AM

Thanks Gunawan. I'll look for that glass heat reducer.

Fiat1 · 1st November 2001, 08:11 AM

http://www.audiovisualizers.com/madlab/lcd_proj.htm

This person has made a video projector and peoples email how also have made them.

vdi_nenna · 1st November 2001, 03:11 PM

I know we said that floods are not the best solution, but here's something for testing.

http://www.allelectronics.com/cgi-bi...-50&type=store

1st November 2001, 08:11 AM	#189
Fiat1 diyAudio Member Join Date: Oct 2001	Some People who have made video projectors http://www.audiovisualizers.com/madlab/lcd_proj.htm This person has made a video projector and peoples email how also have made them.

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31st October 2001, 02:20 PM	#181
Type-E diyAudio Member Join Date: Oct 2001	dwalls32, how strong is your flashlight that you was using for the test? Is the idea of LEDs still possible?

31st October 2001, 02:55 PM	#182
dwalls32 diyAudio Member Join Date: Oct 2001	It's a 1,000,000 candle flood light. It is bright, but only in the center of the beam. Outside of that, it gets too dark to cut through the panel. I need a "flat" light...

31st October 2001, 08:49 PM	#183
Type-E diyAudio Member Join Date: Oct 2001	Oh ic.. do you think it's possible to use car headlights? There are white lights that is extremely bright.

31st October 2001, 09:04 PM	#184
dwalls32 diyAudio Member Join Date: Oct 2001	Well, this is where I could use some electronics help. Vince, I bought the same powers upply you did for leds. It's 12v 47 watt. I bought a big halogen car high beam. It's 12 volt, 50 watt. I hooked it up to the power supply and can get light, but it's not bright at all. I'm sure I don't know how to hook it up correctly. Anyone?

31st October 2001, 09:32 PM	#185
Helix diyAudio Member Join Date: Jul 2001 Location: UK	light conversions : 1 flame = 43.05564 meter candles 1 foot candle = 10.76391 meter candles 1 lux = 1 meter candles 1 foot candle=0.25 flame

1st November 2001, 01:31 AM	#186
Type-E diyAudio Member Join Date: Oct 2001	but then, how does it convert to ANSI Lumens? About your power supply, I think it just doesn't have enough power. Why don't you try using the computer's power supply, the yellow wire is 12V but I don't k now how much current it has.

1st November 2001, 05:43 AM	#187
Gunawan W diyAudio Member Join Date: Sep 2001 Location: Jakarta, Indonesia	Great work dwalls32, now we know it really works! btw, I just read Popular Mechanics, Oct 2001 issued, page 117, an ad about flashlight using 4 led's. They said its beam can be seen from a mile away. maybe this type of led could work for our project. Myren, there was someone who did the same way (ohp and lcd monitor): http://www.avsforum.com/avs-vb/showt...&highlight=OHP to cooling down lcd panel, I saw product demo before, about clear laminated sheet (V-KOOL ?), They laminate a piece of glass and beamed with very hot lamp (it'll fry your hand in second), but behind the glass you can't feel any heat! dwalls32, you can't use that power supply, its defenetely not enough power. rule of thumb you should double the power needed. why don't you use 12 volt car battery just for trying, before you find the right power supply. (cheap OHP trafo can be use for it) Don't forget using reflector behind the lamp, its really important to beamed the light. maybe worth to try 150 watt Xenon bulb type, it's real white light.

1st November 2001, 06:18 AM	#188
dwalls32 diyAudio Member Join Date: Oct 2001	Thanks Gunawan. I'll look for that glass heat reducer.

1st November 2001, 03:11 PM	#190
vdi_nenna diyAudio Member Join Date: Oct 2000 Location: PA, USA	I know we said that floods are not the best solution, but here's something for testing. http://www.allelectronics.com/cgi-bi...-50&type=store

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