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Anton Parkhomenko2019-10-14 14:04:22
Electronics
Anton Parkhomenko, 2019-10-14 14:04:22

Is it possible to use such a power supply?

Good day.
There is a NodeMCU board and AC / DC (Zelo-module).
Relay control requires 5V current. But the NodeMCU board has only 3.3V.
Can I power Troyka contacts in this way? 5da455866b107709559259.jpeg
Power (V) to 5V and G to GND, which go through the output connector of the converter. And throw the yellow wire (S) on the NodeMCU pin for logic (1 or 0) to control the relay.

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kvaks, 2019-10-14
@Astrawelt

1) a jumper on SVG is not needed if there are incoming 220
2) it will work. When a logical unit appears on the signal contact, the relay is activated. In this case, the voltage of a logical unit can be either 5 V or 3.3 V

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