1.5v Joule Thief based on flash trigger coil with optional light sensor

Judul	:	1.5v Joule Thief based on flash trigger coil with optional light sensor
info	:	This circuit is replicated from youtube "jonnydavro" Title-Led Driver. Circuit is filmed using latest Sony DSLR Alpha nex-5N as video camera. I have merely modified the circuit to make leds brighter by using capacitor 0.047uf connected in parallel with Leds array in series and added optional light sensor circuit to only operate in the dark(Standby current only 2uA).Unfortunately i got only 7 blue leds to work with.I'd believe we could connect more eg:white leds or IRs(Could be interesting enhancement for CCTV running on one battery). Application could be eg:emergency light,porch light,garden light and etc.The current consumption is only 20ma for 7 blue leds with 18.18 volts measured across 7 leds ,2.58volts on each blue leds. "Please take note the schematic for T2 is wrong emitter and collector needs to be swapped.Collector to be connected to T1 base if using light sensor" I feel that this could be the best Joule Thief circuit which needs no winding of coil.
Upload	:	21 November 2012
Uploader	:	mif
Durasi	:	1:59
Source	:	http://www.youtube.com/watch?v=2CT7CmwuwKg

Download Now (1:59)

jonnydavro	:	Hi.If you look in the more info you will see the link which works.Thanks for your interest.Jonny.
keys8882967	:	and yes i did remove the space.
keys8882967	:	hi jonny .this link doesn't seem to work. i would really like to see your update on this.is it posted anywhere else? thx
jonnydavro	:	Hi Sanjev.Thanks for trying this circuit and improoing it.I did post an updated circuit diagram in the more info of my vid which increases light.Here is a link.Just remove the space at the start.Happy experimenting.Jonny. h ttp://img15.imageshack.us/img15/1015/updatedleddriverwithadd.jpg

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