Raspberry Pi Forums

I am using the following power supply: https://www.jaycar.co.nz/mean-well-70w- ... y/p/MP3289 which delivers 5V and enough AMPS.

Any ideas as to why the power warning might be happening.

I am feeding it using a USB cable that I have spliced into the power supply.

The USB cable might have thin wires inside that can't carry enough current. Note that the official Pi power supply has very thick wires.

In addition to what @rpdom has suggested, maybe the PSU is not performing within its advertised specification. A 5 volts output with regulation of 2% looks as though it should be adequate. But we don't know what your unit is actually delivering and whether it is stable under working conditions.

Hi all thanks for that. I check the PSU and it's delivering 5V.

The power lead though is very thing. I took a standard cable and cut it.

Would recommendations do you have on how one creates a suitable power lead?

I check the PSU and it's delivering 5V.

It is unlikely that your own checks will be as accurate, pertinent, or responsive to transient ( very short-term ) dips in the supplied voltage as the power monitoring circuitry built in to the RPi system chip.

Would recommendations do you have on how one creates a suitable power lead?

There is no 'standard' usb cable.

Thicker is better. The official Raspberry Pi Foundation Power Supply https://www.raspberrypi.org/products/ra ... er-supply/ has 18AWG conductors.

how about DIY your microUSB power cable using

thicker wires VCTF 2 x 0.75mmsq

and micro USB plug (either needs soldering or screw-in types)

I made a cable to connect to GPIO inputs as per https://www.modmypi.com/blog/how-do-i-p ... spberry-pi. I used some thicker speaker cable, hard to measure diameter but it looks heavy duty enough.

Image can be seen here: https://prnt.sc/ke6s3i

Same issue.

Ok so yip it was the cable thickness. Dug around for some thinker cable (only had 1.35mm) and viola it all works. Amazing how much one learns by actually doing.

Thanks all