Wall charger voltage

Vladislav

I ordered wall charger 5V 3A on amazon (https://www.amazon.com/gp/product/B00MF24Y94/ref=oh_aui_detailpage_o00_s01?ie=UTF8&psc=1)

I measured voltage and it shows 5.38V. Is it ok to plug it to UP board?

Also, I measured my other wall charger (from raspberry pi 3 kit), it shows about 5.4V-5.5V! May be there will be voltage drop after powering on and voltage will be ok?

Michael Miller

You are dead on, you are neasuring the open circuit voltage. Most chargers have a bit higher voltage to allow for drop across a usb cable and drop with load.

Vladislav

Yes indeed it is working