esp8266 external power

[marktn]

Hi,

I have an esp8266 Nodemcu v3, it is powered with usb.
Conneceted devices, TFT screen, buzzer and pn532.

I want to use not the usb power, but an external power device. Total 3 esp8622 devices need an external power.
What is your advice? I already burned one esp... For that i used, VIN and GND, 12 Volt.

There is al lot to find on the internet, but what to use...

[Ath]

Well, USB delivers 5V, so applying 12V on such unit is going to give some sparks

if you connect a 5V source to the 5V pin of the NodeMCU it should work as intended, as the 3.3V will be converted on the NodeMCU from 5V by the AMS1117 regulator on the unit.

[marktn]

Well, USB delivers 5V, so applying 12V on such unit is going to give some sparks

if you connect a 5V source to the 5V pin of the NodeMCU it should work as intended, as the 3.3V will be converted on the NodeMCU from 5V by the AMS1117 regulator on the unit.

What pin did you use?
I was thinking to use the VIN and GND.

[Ath]

That sounds about right.

[TD-er]

What kind of power supply are you using?
Texts like "cut end off" do sound a lot like you're just using any kind of power supply and not something that's really 5V and powerful enough to deliver a stable 5V.

Why not using an USB charge adapter? Those can be had for cheap and you can use just a simple USB cable.

[marktn]

What kind of power supply are you using?
Texts like "cut end off" do sound a lot like you're just using any kind of power supply and not something that's really 5V and powerful enough to deliver a stable 5V.

Why not using an USB charge adapter? Those can be had for cheap and you can use just a simple USB cable.

I have more options as power adapter. I am testing to know what the best is. I did cut the end off

The problem is that I want the power adapter not near the esp8266. Because there is no place.
Between the power adapter and esp8266 is 10 meter.

Any good and stable suggestions?
I need to power 3 esp8266 boards.

[TD-er]

Then I would suggest to add some DC/DC converter board to make a stable 5V close to the ESP's.
This way you don't have a fluctuating voltage on the ESP side due to the resistance in the long cable.

For example something like these: https://www.tinytronics.nl/shop/en/powe ... -5v-output

This does require you to input something between 7V and 26V.

[marktn]

Then I would suggest to add some DC/DC converter board to make a stable 5V close to the ESP's.
This way you don't have a fluctuating voltage on the ESP side due to the resistance in the long cable.

For example something like these: https://www.tinytronics.nl/shop/en/powe ... -5v-output

This does require you to input something between 7V and 26V.

Thanks! I will order that.