I have a circuit that consumes enough power to keep running from a powerbank. However, to save energy I'm putting it in low energy mode at night.
Problem with powerbanks, they turn off when not enough power is consumed. My proposed solution was creating a separate low-power circuit that times how long the powerbank is off and at the right moment provides a short burst of power. The devices in my circuit then turn on, the powerbank detects this and also turns on.
All the devices in my circuit are Arduinos or Arduino compatible running on 5V. The circuit pulls a maximum of 200mA. I have no physical input on the system as it is placed in a different location. Everything needs to be automated. It preferably has to use the powerbank due to portability and the desire of having no external wires.
What is a safe method for an external circuit, to turn on another circuit in an automated way?