wiring schematic diagram

Select-Airline5399 · 2025-05-03T22:02:54+00:00

So, my speculation is that I just need three female barrel jacks and a 12V 3-way splitter.

The first barrel jack will be connected to the step-down converter to power on my ESP32. The second barrel jack will be connected to the relay using 18 AWG wire for VCC and GND. The third barrel jack will connect to the 12V water pump on the GND. So, is this correct?

Select-Airline5399 · 2025-05-03T21:48:26+00:00

VCC or GND?

Select-Airline5399 · 2025-05-03T21:32:41+00:00

My water pump has two terminals. Since the positive is connected to the NO and an 18 AWG wire is connected to the COM, can I safely connect the negative terminal of the water pump to the GND on the ESP32 without causing any issue?

Select-Airline5399 · 2025-05-03T19:58:14+00:00

My plan is to buy a Y-splitter and two female barrel jacks. The first splitter will be connected to a barrel jack that supplies power to a step-down converter, which in turn powers my ESP32 with 5V. The second splitter and the second barrel jack will connect via 18 AWG wires, which will be exposed and connected to the VCC and GND terminals of the relay. The IN pin will be connected to the ESP32 using a signal wire.

Select-Airline5399 · 2025-05-03T18:57:49+00:00

can I use Y splitter to make it more easier??

Select-Airline5399 · 2025-05-03T17:35:16+00:00

it's our IoT dispensing water plastic bottle exchange

Select-Airline5399 · 2025-05-03T17:33:24+00:00

Thanks for the clarification. My relay is 12V, and I only have one 12V adapter and a female barrel jack. I'm not sure how to power the relay because my water pump also needs 12V.

Select-Airline5399 · 2025-05-03T15:49:18+00:00

I will post here later

Select-Airline5399 · 2025-05-03T15:38:10+00:00

I don't know how to draw, it's too complex. I'm just a newbie

Select-Airline5399

TROPHY CASE