Author Topic: Does polarity of input power matter?  (Read 189 times)

Offline gpvillamil

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Does polarity of input power matter?
« on: January 16, 2019, 03:16:29 PM »
I'm driving the PiCap with 5V 4A.


The PSUs came with a barrel connector, so I cut that off and used a multimeter to check polarity. I attached a flag to ground. Then made sure to connect ground to ground, and V+ to V+.


It works fine, but I wonder if this is necessary? Does it matter if V+ and GND are wired in a specific way?

Offline Bwinter

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Re: Does polarity of input power matter?
« Reply #1 on: January 16, 2019, 03:38:57 PM »
Absolutely

Offline gpvillamil

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Re: Does polarity of input power matter?
« Reply #2 on: January 16, 2019, 03:50:57 PM »
Thanks, I figured that would be the case. Especially with LEDs.

 

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