5v UPS

[marko_st]

Hi to all on forum!


This is very interesting topic for me, because, some time ago I was looking for some kind module for automatic power ON/OFF and “UPS” for the Raspberry Pi for use in boat or car.

After some time of searching I decide to do it myself.

My request was:

• no additional battery, only use the car/boat battery (12V)
  
• no additional switch, only automatic power ON and power OFF with an ignition key
  
• integrated DC/DC power supply for the Raspberry (5V)
  
• same dimensions as a Raspberry Pi for easy mounting (on the bottom side)
  

and principle of working is:

• power ON the Raspberry Pi after the ACC/IGNITION is ON for more than 30 seconds (default)
  
• properly shutdown the Raspberry Pi after the ACC/IGNITION is OFF for more than 15 seconds (default)
  
• power OFF the Raspberry Pi 30 seconds after shutdown start
  
• auto cut-off built-in DC/DC step down power supply, so there is no standby current consumption
  

If this is interesting to someone I can put link here (if it is allowed) with some details of working principle, connection and pictures (I sell some rest of module on link), or you can ask here or on PM.