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Infrared Flashlight is underpowered?
I need help overcharging a flashlight i made with infrared LEDs. I saw on a how to somewhere that you can make sudo Night Vision with ILEDs and a digital camera. so i replaced 8 LEDs from a $4 walmart flashlight. It works, but only for a few inches. The how to had it going across the room. How can I make these brighter. I removed the resistor from the flashlight. I also tried a 9V battery. The flashlight originally used 3 AAA batteries, which i would still like to use...
The ILEDs tech specs
Normal:
Radiant Power (100mA): 16mW min .
Forward Voltage: 1.2v
Forward Current: 100mA
Absolute Max Ratings:
Forward Voltage (20mA): 1.6v
Reverse Voltage: 5v
Forward Current: 1.2A
Reverse Current: 10µA
Wavelength: 940nm
Please use easy to understand language...if you can...
I'm guessing the light had two diodes in series x 4, in parallel. I'm not sure if the AAA batteries can supply 400 mA continuously -- I know the 9V battery can't.
Are you sure they match up well with your digital camera's IR response? Do you have the identical equipment that the original system had? It could be that your camera just isn't that good in the IR range and the one in the demo is good with the wavelength of the IR light of the diodes.
You "removed" the resistor. Did you replace it with a short? Did you use a low-inductance connection like copper braid (400 mA is a fair amount of current) or something like 30 Gauge Kynar? You probably don't want to remove the resistor, unless you want to destroy your ILEDs. You may need to change the value to about 2.5 ohms, so 400 mA will drop about 1 V across the resistor.
