- May 28, 2008
When setting driver current, can I use the same test load as for blu-ray, or do I have to do something special?
True, but we want to simulate diode. If we put just 1ohm resistor then forward voltage would be 1V. 5ohm is closer to Blue diode, it'll make 5V voltage drop on 1A current.Less resistor value = less heat dissipated ..... stay on 1 ohm, just get 3 or 5W resistors, or make "grid" mounts (4 elements of 1W, or 9 of 1/2W, as example), if you don't find the high power ones .....
Sorry, but i think you are confusing something .....True, but we want to simulate diode. If we put just 1ohm resistor then forward voltage would be 1V. 5ohm is closer to Blue diode, it'll make 5V voltage drop on 1A current.
Even resistor is not what we want. We can use it just for certain current.
Changing current forward voltages changes differently than blue diode would act.
What we need are silicon diodes rated to higher current.
Then we can put certain number of diodes in series to simulate blue diode on any current.
drlava used 5.4 ohm or soemthing to test out efficiency of Flex and Micro at 5.4 V drop - well at least for Micro, since it can provice one amp, dunno for Flex.I know that we can use 1ohm resistor for current readings but Eudaimonium mentioned 5ohm resistor to use as a dummy load.