Alternate Power DC-IN on the Euler Bus also with PI filter for batt operation

[MarkHaysHarris777]

   

In the pic above we are looking at an alternate method of powering the PineA64 with DC-IN on the Euler Bus; +5v on pin(4), and ground ( - ) on pin(6).  

In this pic above white is common (ground) and black is 5v ( + ) the 'hot' wire.  Electrically, pin(2) and pin(4) on the Euler bus are connected to DC-IN on the micro usb power jack (see schematic pp6 of (19));  if a person is careful, either method may be used to provide 5v power to the PineA64 board.  WARNING:  do not do this if you are not sure of your skills, nor if you are unsure of the theory. Check with someone skilled before proceeding.

There are a couple of reasons why you might want to connect DC-IN with this alternate method:  1) you may want to provide your Play Box with a 5v barrel connector for charging,  2) your power supply is only rated at 2.0A (5v) and you want to shorten the supply line and bypass the weaker micro usb connector,  3) you want to make a more solid power connection perhaps with a [ toroid | cap ]  low pass filter for use in an auto  or with other dc-dc converter. 

   

Normally I do not recommend this method; because it has the potential for making mistakes;  only connect 5v on DC-IN, never reverse the polarity of the wiring (always check, never guess);  that said, this method does provide an alternative for routing DC-IN for those who have the skills and know what they are doing. 

WARNING:  If you're looking at the schematic(s) pp12 of (19) the 5v on pin(8) is NOT a DC-IN pin;  pin(8) is a 5v output pin only.  The only DC-IN pins are pin(2) and pin(4).  Any ground pin may be used for ground; however, pin(6) is convenient for the purpose.