I have a battery operated UNO + Sensor circuit which i want to power off 15 secs after the user presses a button to power it on.
I bought the Pololu mini power switch planning to use it as a Auto Power off device.
The set up is simple :
The battery power is applied to the Vin and Gnd terminals.
The UNO is connected to the Vout and Gnd terminals.
Pin 2 of the UNO is connected to the control Terminal of the Pololu module.
Upon pushing the button on the module the UNO powers up , does something and after 15 secs pulls the Pin 2 Low. I expect the Pololu module to power down… not happening !!
What am i missing ? ( I can put the UNO to sleep but the sensor circuit draws about 50mA and hence i want to power off completely … of course in the final version even the UNO will be replaced by a barebone 328P chip)