Hello all,
Excuse if this is a dumb question, but I'm a MechEng and not a ElecEng.
I use a LiIon battery to power something normally running on 2x1.5V batteries. So I thought, I'm going to drop the voltage a bit, and rather than use a LDO (or god forbid a resistance based divider bridge), I'm just going to add some diodes in serial (not Schottky obviously).
So I've got a bunch of 1N4007, decide I wanted to drop the voltage by more than 0.7V, so add 2 in serial.
Now that's not the first time I do that, and it works fine, but my question is: each time I did this, I can definitely notice a drop in voltage when adding 1 diode, but the 2nd one always seems to drop the voltage by quite a bit less than the first one. I.e. if I add 1 diode, I may drop say 0.6V, but if I add another one, the drop is always less than twice as much.
Can someone explain why that is?
Thanks!