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The wrong tree? I think I'm barking up the wrong forest!!! :oops:
A voltage-to-current converter sounds to me like "op-amp". Unfortunately, I cannot aford adding one more IC to the board. It's a space problem. :(
:idea: Another possibility I'm considering is to forget the dac and make the...
Ok. I'll explain the whole thing for those who don't have enough imagination :-)
I have a microcontroller with a 8-bit DAC attached to it, so my program can set the DAC's output from 0 to 5V by setting its value from 0 to 255.
Connected to the DAC output I have the resistor-led pair.
So...
Thank you for your reply.
Answers 3 and 4 not possible!!! I have a BLACK box, and have no access to the led itself. Cannot place any light sensor or something similar.
The answer 2 is also discarded because I must keep the component count and size at a minimum, and I can not aford adding...
Hello!
I've a black box containing a resistor and a led connected in series to the resistor by it's anode.
The black box has two accessible terminals: terminal 1 (which is the free resistor's lead) and terminal 2 (the led's cathode)
So I connect the black box to a voltage source and begin a...
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