On Thu, 31 Jan 2008 17:44:11 +0000, George wrote:

"George" wrote in message
.uk...
Diagram here if anyone interested? it can be made up on veroboard if
you
are
not bothered about a PCB one.

The more leds on the cicuit the better the night vision.
http://www.reject.org/tsd/liz/gbppr/...v/ir_illum.pdf




Whats the best infareds for this project,Blue or Clear? as I found this
site out of a few to be a lot cheaper in price.

http://www.esr.co.uk/Optoelectronics.PDF

TA

Probably part number 720-530 on page 21. Those will give 80mW radiant
power each, if you adjust the resistors to put 100mA through each string
of LEDs. Using a 12v supply you could make R1-R8 15 ohms rather than 39
ohms. This is running them close to their maximum so perhaps a slightly
higher value may be better... Note that your total load current would be
400mA, so this isn't really for battery operation.

--
Mick (Working in a M$-free zone!)
Web: http://www.nascom.info http://mixpix.batcave.net