More on the easy voltage reference later. Here's a bit of a teaser for you: take a diode, any old diode, a resistor and a 9v battery. Hook it up as follows, +9v to resistor, resistor to one side of diode, other side (banded side) of diode to -9v. Read the voltage across the diode, just the diode and only the diode. Now change the value of the resistor, read the voltage across the diode again, change the resistor again, read the diode again, swap the 9v battery for the 4cell NiMH pack, read the diode again. Let me know your results.[/QUOTE]

I will do this test a little bit later, i will give you the results.