I have a very simple circuit which I have measured the current to be only 3mA but should be in the range of 18mA.
I have a simple circuit using 2 AA batteries (NiMH) at 1.3V each in series for a total of 2.6V and a 220Ohm resistor along with my basic red LED.
I = E/R
Using Ohm's law I calculate that I should get approx. 11mA of current .011 = 2.6 / 220
Double-Checked Resistor Value
I double-checked my resistor with meter and they are at 215 Ohms but that would mean I would get slightly more current anyways.
I also measured total voltage in circuit and it does measure at 2.6V. I measured the voltage drop across the LED and it was at approx 1.775 which seems correct also.
Why might I be getting less current than expected (3mA versus 11mA)? Is there something I'm not calculating properly for?