Automatic turn-off relay timer, box and EAGLE files

► Automatic turn-off relay ◄
MCU Attiny13 (low fuse 0x7A, high fuse 0xFF) is connected to GND, +5V and PS-ON to ramps. Firmware - if PS-ON pin is LOW at start your printer, then relay is ON. When the PS-ON pin goes to HIGH, the MCU reads the trimmer and subtracts the time to turn off the printer 5-35 minutes.
I use RaspberyPI for powering RAMPS, so I don't need a button to connect contacts from the relay. When you don't have a separate source for RAMPS, you must have to use the push button t