How to connect esp8266 to batteries and switch

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1

how connect esp8266 NodeMCU to 9v battery and switch to turn on and off the board in this case what pins should i solder to eatch other ?

2

What the batteries? Specifications, datasheet?

3

You would connect the battery to the Vin and GND pins.

This battery might not last very long, and might not work at all with the NodeMCU. If it does work, two thirds of the battery's energy will be wasted.

I would recommend a different battery such as 4xAA NiMH.

If you must use a 9V battery, I would recommend trying a "buck converter" such as this one to convert the 9V into 3.3V and power the NodeMCU though the 3.3V pin.
s-l400 (16)

1 Like
4

really thanks

actually i want to use 9v battrey and a switch and esp8266 board to turn it on and off the board in this case what pins should i solder to eatch other
i would really appreciate it if you answer again.

5

@sam_qwert

Your other topic on the same subject deleted.

Please do not duplicate your questions as doing so wastes the time and effort of the volunteers trying to help you as they are then answering the same thing in different places.

Please create one topic only for your question and choose the forum category carefully. If you have multiple questions about the same project then please ask your questions in the one topic as the answers to one question provide useful context for the others, and also you won’t have to keep explaining your project repeatedly.

Repeated duplicate posting could result in a temporary or permanent ban from the forum.

Could you take a few moments to Learn How To Use The Forum

It will help you get the best out of the forum in the future.

Thank you.

1 Like
6

I would recommend something like this
s-l400 (18)

7
  • Solder 9V Ground (a.k.a. Negtive) wire to the negative input of the 3.3v buck converter.
  • Solder 9V Power (a.k.a. Positive) wire to one side of the power switch.
  • Solder a wire from the other side of the power switch to the positive input of the 3.3V buck converter.
  • Solder a wire from the negative output of the 3.3V buck converter to the Ground hole of the ESP8266.
  • Solder a wire from the positive output of the 3.3V buck converter to the 3.3V ("3V3") hole of the ESP8266.
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really thanks man :pray: :pray:

9

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