A red flashing LED is an insufficient power supply. https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=58151#p1485558


Is there a way to keep the date present at power supply lack time? The issue with improper shutdown1 is that logically, it cannot be predicted. At all. When the power is cut, the power is gone. There is no warning or few microseconds with some electricity left. That's a physical fact. It is not subject to argument, some hidden loophole, etc. It is like ...


Two words of warning: Don't underestimate startup currents of motors. It's not uncommon for a stalled motor to draw 10 times the current it consumes during normal operation (only for half a second, but half a second is plenty to reboot your Pi). Check the specs or measure this value before you decide how much current you need. Don't try to save every last ...

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