I'm using a really good 5V-35A switching power supply to power some mini PCs (Cubieboards if that matters) as below.
The weird thing is that when I measure the voltage on the PCs input terminals, they are below the power supply's voltage. If I measure it directly at the PS it's always 5.2V, no matter how many PCs I use on the circuit. However, If I measure it on the terminal that connects all the PCs, it gets lower and lower as I increase the number of PCs. Even though they are connected in parallel!!!
They don't have any other connection between them, only the power source.
The terrible thing about this is that after about 5 PCs the voltage gets so low that I can't power any PCs anymore (and I need to power around 20 of them using this source). I've tried using a different power supply and different connectors and the results were exactly the same.
What could possibly be happening? How can I solve it and what should be the best way to power all of those devices using the supply I have?
Thank you in advance,