Dear Group, apologies if this post is duplicated.
Those of you developing commercial products intended for extremely low battery usage, how do you reliably measure uAmps ?
Do you use test instruments that can accurately measure uAmps while not getting destroyed by occasional usage of hundreds of milliamps for operating a relay or display backlight ?
Do you charge up a giant capacitor and measure the time the product can keep on running ?
Or do you use some way to integrate all power usage including occasional spikes ?
I am in awe of Honeywell / Ademco security products, where a friend had wireless equipment installed 4 years ago and still hasn't had to change batteries. I know some of their products use Atmega microcontrollers, but my friend won't let me crack open his entire system.
(Or maybe someone listened to the very funny NPR CarTalk episode where some mechanics kept adding gas to another mechanic's new Fiat, which made the owner brag incessantly about italian engineering, until they changed course and started removing fuel on a daily basis to have him completely humbled by his Fiat. So maybe ADT is sneaking in and changing batteries)