I have about 100x3W SMD LEDs, often called LED star, but these are without circuit board used as radiator.
Every LED have different voltage drop, and I plan to match them all in series of 4, so 25 parallel of LEDs, each in series of 4, resulting with contraption that I can regulate with adjustable 12V power supply.
How should I measure these LEDs to match voltage drop between all 25 pairs?
Will low power measurement be enough? My multimeter can declare their voltage drop at 0,3mA
Or voltage drop would be different at 900mA? If so, measuring them in high current mode might prove difficult, especially without proper heatsink, voltage drop changes depending of temperature.
Every LED have different voltage drop, and I plan to match them all in series of 4, so 25 parallel of LEDs, each in series of 4, resulting with contraption that I can regulate with adjustable 12V power supply.
How should I measure these LEDs to match voltage drop between all 25 pairs?
Will low power measurement be enough? My multimeter can declare their voltage drop at 0,3mA
Or voltage drop would be different at 900mA? If so, measuring them in high current mode might prove difficult, especially without proper heatsink, voltage drop changes depending of temperature.