Wow, that's an extremely well documented page... It has everything..and very well described
I suddenly have ton of admiration for this Nick Gammon
My device can't be put to sleep, because it has to permanently detect the interruption of a infrared beam...
so all sleep modes are useless for me.
Also that bootloader was not for my board, and as soon as I will have time I will try to run it down to 1mhz using Nicks instructions.
@tim About your idea of cutting the voltage regulator, I have some questions:
1. is it really necessary to cut it?
It is used only to power up the board, and if I use the RAW pin I will bypass the regulator.
I will use several batteries in series & paralell to have 3V
2. is the voltage regulator used if the board is powered via the RAW pin ?
3. Even though the arduino can work down to 1.8V, I am using devices that work at 3.3V so I should let the brown-out intact at 3.3V.
Am I right?