So I'm trying to build an arduino ups for my dash camera. I can probably use something simplier like a 555 timer or something but don't know how to use it properly.
My goal is when the power stops from my car the ups will stay on for 3 minutes and then shutoff.
When the power from my car is on it will charge the ups's battery as well as power the dash camera.
The problem with my dash camera right now is that when the power from the car stops, it no longer goes into a powerdown cycle and shut off properly, so my last video is always corrupted. So I'm hoping the extra 3 minutes will allow the last recording to finish.
Any help would be appreciated.
I have a module that charges a 3.7v lipo as well as regulates the 3.7v to 5v. I need someway to stop the power going after the arduino senses that the car power is off and starts the 3 minute timer and stops the power going to the dashcamera.