just a look at a tripod flood light i made
the purpose of this contraption is to light up areas in total darkness
to allow skateboarding in the winter months (skateparks etc)
the light will brightly light up a 5m radius and then sufficiently light up a 20m radius - which is enough for my needs
it is made from a camera tripod
aluminum sheet
heatsink (cpu)
9 x cree p4
3 x 3w 1ohm resistors
wire
12v 12ah sla battery
cree's are 3 parallel sets of 3 in series
battery under load is 12.4v and after 1hour is 11.8v
so id be interested in knowing the current to each cree (at the start and end of 1hour)
the heatsink just gets warm - as its in the cold winter air
let me know what you think of the light (and the answer)
Alex
the purpose of this contraption is to light up areas in total darkness
to allow skateboarding in the winter months (skateparks etc)
the light will brightly light up a 5m radius and then sufficiently light up a 20m radius - which is enough for my needs
it is made from a camera tripod
aluminum sheet
heatsink (cpu)
9 x cree p4
3 x 3w 1ohm resistors
wire
12v 12ah sla battery
cree's are 3 parallel sets of 3 in series
battery under load is 12.4v and after 1hour is 11.8v
so id be interested in knowing the current to each cree (at the start and end of 1hour)
the heatsink just gets warm - as its in the cold winter air
let me know what you think of the light (and the answer)
Alex