07-29-2017, 05:02 AM
yeah, but following that logic you would have read many reports in the forum of pumping 12V or 9V through the pins fried the board. using the bigger barrel increases the contact area between the barrel and the jack by ~ 30 - 40 percent. it was essentially a cost decision, ask tllim he probably did not give much consideration if any the the smaller jack decreases overvoltage chances. many users will make a diy larger jack to smaller barrel which totally negates any over-voltage protections. how many power supplies with that size barrel have you seen? i've only seen pine64 power supply. that size barrel is not that common at all in the u.s.a. name 3 other sbc that use it?