PCB Not receiving full voltage on battery

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YaYa
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Re: PCB Not receiving full voltage on battery

Post by YaYa » Sun Nov 18, 2018 11:56 am

did you test the voltage directly at the battery pads ? just to be sure it's not the protection board inside the battery that is faulty. also wire directly the TP4056 to the battery without the switch to eliminate possible resistance inside the switch...
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Re: PCB Not receiving full voltage on battery

Post by Bluebomber » Sun Nov 18, 2018 2:39 pm

I did not but I'll be sure to try that when I get home. I'm assuming just be careful not to shock myself?

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Re: PCB Not receiving full voltage on battery

Post by YaYa » Sun Nov 18, 2018 3:22 pm

You risk nothing at that voltage and current :lol: don’t worry, you could even take positive in one hand and negative in the other, nothing would happen :D
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Re: PCB Not receiving full voltage on battery

Post by Bluebomber » Sun Nov 18, 2018 10:45 pm

Ok just tried soldering the charging board directly to the VCC, still 1.13v on the PCB

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Re: PCB Not receiving full voltage on battery

Post by YaYa » Sun Nov 18, 2018 11:13 pm

And just the raw battery voltage without load ? Several measures, do you have 4.2V (full battery)
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Re: PCB Not receiving full voltage on battery

Post by Bluebomber » Sun Nov 18, 2018 11:28 pm

Ok I finally got it... It was a bad connection to the 5V gpio

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Re: PCB Not receiving full voltage on battery

Post by Helder » Mon Nov 19, 2018 2:30 pm

This is almost always bad GND or bad 5V on the board or Pi GPIO so always redo those first.
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