Hi all, I have to determine the power consumption on a device in different states. I would like to have your inputs about the procedure I have thought:
- Hardcoded the device in a specific mode
- Measure the voltage drop (Vdrop) across a series resistance (Rtest) at batteries output (1.0 or 0.1 Ohm, I'm not sure what is best ???) (Do I must considered cable resistance used to measure??? N.B. I use a HP3456A 6 1/2 digits voltmeters)
- Knowing the batterie voltage (Vbatt), the power drain from batteries is Pstate = Vbatt * Vdrop / Rtest
- Since I use a boost converter to raise the 1.5V from the 2 AA batteries to 3V (voltage at which all the device components works), the current drain by these components is approximatly 2 times less (if I forget the switcher efficiency)?
Don't hesitate if you see major problem and/or have different methode to propose! Thanks in advance for all your input! Fred