Hi,
I am building a device, which checks sms messages every few hours and has to run for a month or so on a 4Ah LiPo battery.
Now an Atmel328p in sleep mode controls the phone bit fine, however the phone (Adafruit Fona) is drawing 25mA when just connected and switched off.
So I thought I use a 'digital switch' to switch off the power for the phone when in sleep mode.
What would I use for this? MOSFET? logic level gate MOSFET? Transistor? Relais? bearing in mind that the phone can draw up to 2A for a short time.
And what are the advantages / disadvantages of each?
Thanks for any advice