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Tristan68 is the best to answer to this question.
Sorry, i can't help you for this one.  IR Led SFH485P support 1,5V max only ... Best valu are 70 ma for each led, with 1,5 volts max on each led ... for my 3 dots cap model i use 3 x SFH485P, 2 x AAA in serial, and 3 R to have 70 ma on each led (look 3 dot cap pdf document in freetrack 2.2.0.279 package ... You will see my model ...) |
I will borrow this thread too if you don't mind.  So you have connected the leds in parallel? What kind of battery life does those 2xAAA give? I'm using SFH485P and VX-1000 and I'm bit confused what kind of voltage and current does my system need. Farnell says Voltage, Vf Typ:3V but I now noticed the specs pdf with says that 1.5(1.8)V. Previously I aimed to 3V and 30 mA but apparently I was wrong and I should aim for 1.5V and 70mA? No chance on 30mA when VX-1000 is modded with IR- and visible light filter? One AAA gives something like 850mAh so with two in series you get the same? So overall you get battery life of 850mAh / ( 3*70mA ) = 4 hours? Am I correct? So if I want more battery life I should use 2xAA so I would get something like 2200mAh and battery life would be 10 hours? And if I want more I would have to take it from USB or other Power supply? |
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