I have a generator which after being regulated, outputs 70mA through 3V. (I should say the amps go through the voltage right?) In some circuits I may be using diodes. Some advice me that the voltage drop is 0,7. Others say it's dynamic, that I should divide the driving voltage over the driving current. Others are stating that the LED's forward voltage drop is 1,7. However, I assume I only need to refer to the datasheets? My other and more relevant problem is, I'll be supplying this voltage and current, (once regulated to correct values, but for now, let's use 70mA and 3V), to a microprocessor. Would there be any resistors which I should take into consideration and calculate the voltage drop, so that 3V (or what ever that driving voltage required is), would not be sufficient, because some of the voltage would drop as it passes through the resistance in the microprocessor, OR! Would I not have to be concerned with this, and just assume that the power supplied from the generator, will be delivered? Should I simply ignore the resistance in the microprocessor (or any other type of unit for that matter, such as LCD or mobile phone), and just compare the generator output with the driving input of the device/unit? So if generator generates 3V, and the driving voltage of the unit is 3V, I'm ok?