Hi,
My first post here.
I have 4pcs. SST90 LED and SST90-reflectors (73mm diameter), also 4pcs. suitable heatsinks, bought at dealextreme. This reflector is suppose to be attached on the front of the LED chip, but the LED has its solder connectors on that side. That will result in short circuit if I place the aluminium reflector on it.
Have anyone built a flashlight or other kind of torche with these items, and possibly have some tips and hints?
I plan to mount 2 pcs in series driven with a car battery, and a resistant insolated copper wire (0.65 Ohm) as a protection against too much current. I read that these SST90 LEDs are driven at 4.2V at 9A maximum. With approx 14 volts on the car battery when the engine is running, I will have approx 5.6V over the copper resistor, and at 9A there is 50W heat (I do not care about this loss - I just want bright cool white lights on the car).
Vidar
My first post here.
I have 4pcs. SST90 LED and SST90-reflectors (73mm diameter), also 4pcs. suitable heatsinks, bought at dealextreme. This reflector is suppose to be attached on the front of the LED chip, but the LED has its solder connectors on that side. That will result in short circuit if I place the aluminium reflector on it.
Have anyone built a flashlight or other kind of torche with these items, and possibly have some tips and hints?
I plan to mount 2 pcs in series driven with a car battery, and a resistant insolated copper wire (0.65 Ohm) as a protection against too much current. I read that these SST90 LEDs are driven at 4.2V at 9A maximum. With approx 14 volts on the car battery when the engine is running, I will have approx 5.6V over the copper resistor, and at 9A there is 50W heat (I do not care about this loss - I just want bright cool white lights on the car).
Vidar