Retropsu 5.2v but only 0.05 amps?

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mosser
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Retropsu 5.2v but only 0.05 amps?

Post by mosser » Mon Jul 15, 2019 4:22 pm

I'm trying to switch out a powerboost 1000c for a retropsu in my existing project. I wired it up but my pi won't boot up the only light is the red led on the retropsu. I removed all the wires from the retropsu and I get a green led.

At this point I measured the voltage and amps on both boards with just the microusb cable attached:

retropsu:
5.2 volts
0.005 amps

powerboost 1000c :
5.08 volts
1.4amps

Reconnecting the powerboost 1000c to my projected showed the pi boot successfully.

I'm testing with just a microusb cable attached and using the same cable for both tests. I'm testing across the ground and output pads.

Any ideas what I'm missing here?

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Helder
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Re: Retropsu 5.2v but only 0.05 amps?

Post by Helder » Mon Jul 15, 2019 11:53 pm

Battery is missing. It won't output the proper voltage without a battery attached to it.
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mosser
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Re: Retropsu 5.2v but only 0.05 amps?

Post by mosser » Tue Jul 16, 2019 1:14 am

Ahhh. Cheers @Helder

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