Problem powering up 2 NodeMCU´s and 8 * 12vRelays

Using Arduino General Electronics
10

Samsara_Exit:
I played a little while with those "LED" and "CC" screws in 5V regulator. And surprise.. Its started work at some point.

If we had a decent picture of that regulator board, we might be able to figure out exactly what those controls do and how to set them up. ("CC" almost certainly sets the current limiting or Constant Current value.)

Samsara_Exit:
And that question of yours that why I've connected both (G and VIN) and NodeMCU´s USB-port for power. As I've understood it cuts the power in from the one input you're not using.

So When I connect the 5V USB-cable to NodeMCU´s USB-port, NodeMCU takes power in only from that USB-port then, at the same time forgetting those (G- and VIN-pins). And other way round. If I take the 5V USB-cable off from that NodeMCU, it starts to take power in from those (G- and VIN-pins).

So those are not feeding power from two different places at the same time.. Its the pins or the connected USB-cable overrides those pins.

I can't make any sense of that at all! :astonished: Can anyone else?

Have you seen a schematic of the V 3.0 somewhere?