abc123
Member level 4
auto power off circuit
Any cheap and good way to do auto power-off for battery powered MCU devices?
with a single push-button,
1) to power-on, push the button
2) to power-off, push the same button for 2 second
3) auto power-off, if no activity for 60 second
MCU with sleep mode still consume 4uA and other device such as voltage regulator consumes more power, it will only last for 1 month for 9V battery in sleep mode. the only way is to cut off the battery connection totally after power down.
most of the battey powered device need this kind of functions to save the battery power with just a single push button.
Any good way? may be hardware/firmware combined solution, without expensive power-management IC.
Any cheap and good way to do auto power-off for battery powered MCU devices?
with a single push-button,
1) to power-on, push the button
2) to power-off, push the same button for 2 second
3) auto power-off, if no activity for 60 second
MCU with sleep mode still consume 4uA and other device such as voltage regulator consumes more power, it will only last for 1 month for 9V battery in sleep mode. the only way is to cut off the battery connection totally after power down.
most of the battey powered device need this kind of functions to save the battery power with just a single push button.
Any good way? may be hardware/firmware combined solution, without expensive power-management IC.
