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I have a PSU from Amazon that provides 5V and I used my trusty multimeter to adjust the voltage to exactly 5.0V. I used it previously to run some silent fans, but I don't have any use for that anymore now.. Time to see if I can use it for the Raspberry. It gets 5V through the charger and the PSU gives up to 5A..

Now when I read the schematics on https://www.raspberrypi.org/documentation/hardware/raspberrypi/schematics/ for the Raspberry Pi 3 Model B+, I can connect the Pin 1 of J1 (Power in, 5V-) through PP2 and Pin 5 (Power in, GND) with either PP3, PP4, PP5 or PP6.

I have soldered a small wire with a dupont connector to PP2 and PP3. However, when I attach the PSU to it, nothing happens. I have double checked - the Pi turns on with the regular charger and the wires are properly connected.

Can you give me any suggestions how to make this work?

Kat Seiko
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Thanks to @tlfong01 and some further searching, I learned that there is such a thing as "technical" and "actual" voltage. The wires were placed correctly - the "problem" was just that the wires had to be switched around.. I initially didn't want to try that, fearing I might break something, but it turns out that my fears were unfounded.

Kat Seiko
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Use an USB cable and make a power line with it. Then put it in the power port of raspberry pi 3. To make such converter use a multimeter to detect the polarity then set up the whole thing. But my recommendation is to use a 3A PSU so that raspberry pi wouldn't fetch more power than it needs,

Sohan Arafat
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