At first I thought it was a problem with the power module as I couldn't change the output power. I finally figured out that the potentiometer needs to be turned more than 15 turns before the output voltage starts to change. I have a 24VDC power supply and the power module is set to 5.00VDC. After plugging in my Raspberry Pi, I checked the voltage again under load and it was still 5.00V DC. I was very happy to see that the voltage did not change under load. I've been using it for 1 month with no problems. I would buy this again.
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