Here's to the experts...
I need to build a IR illumination for spectroscopy applications employing 2 different wavelengths LEDs (2x20pcs x 100mA LEDS, Uf1=1,3V, Uf2=1,5V)
I've made a first shot at that and verified that my greatest problems are temperature and supply current stability as these factors greatly influence the spectra characteristics, which should be absoulutely stable.
I know it's not 100% correct, but for the sake of saving some work I wired the stuff like that: 4 Leds in a row + R x 10 parallel makes 40 LEDs and it looked ok for me.
Anyway, what I need now is temperature control for my LED socket (aluminum preferably, but still flexible there) and a current control for 10 x 100mA = 1 A. Has anyone a fancy idea?
Thanks a lot
Melanie
I need to build a IR illumination for spectroscopy applications employing 2 different wavelengths LEDs (2x20pcs x 100mA LEDS, Uf1=1,3V, Uf2=1,5V)
I've made a first shot at that and verified that my greatest problems are temperature and supply current stability as these factors greatly influence the spectra characteristics, which should be absoulutely stable.
I know it's not 100% correct, but for the sake of saving some work I wired the stuff like that: 4 Leds in a row + R x 10 parallel makes 40 LEDs and it looked ok for me.
Anyway, what I need now is temperature control for my LED socket (aluminum preferably, but still flexible there) and a current control for 10 x 100mA = 1 A. Has anyone a fancy idea?
Thanks a lot
Melanie