How to connect esp8266 board with 6v extra power through 5v pin

Projects General Guidance
1

hi, I have connected just the extra power (using two 3v button battery in series) and esp8266(connected with a mpu6050 sensor)together through the 5v pin; however, It failed sometimes.

I have a few questions:

1, Is the voltage sufficient by just connect those boards with 6v power

2, do I need a LM1117 or something like that to stable voltage?

3, i want to do the same way to power a esp32 s3 zero board, is it okay to do so?

2

The voltage is fine. The board is a 3.3v device and has a 3.3v linear regulator on board which will take some more than 5v, but please do not connect USB at the same time (i think)

I suppose it is, they have the same setup. But !!

The current draw of the ESP8266 is significant (up to 280mA peaks and 80mA constant) and the button cells can not provide this reliable. For an ESP32 this is even more. Button cells just don't provide enough current.

3

thank you so much for the explanation!!
than how do I overcome this problem?
will lm1117 help?

4

With significantly bigger battery.
Both for the discharge current and also for the battery life.

  • 3-4 AAA in series to vin.
  • single cell LiFePo (3.2V) directly to 3.3V pin
  • 3.7V lipo through some very low dropout voltage regulator (not LM1117) to 3.3V pin.
5

thanks for the reply, I will try this way

6

I noticed that the voltage of the battery you recommended are all around 3v, is it sufficient if I connected my esp8266 to other things( LED, MPU6050 and WiFi function)?

7

Which one? I offered 3 options...

8

the last two

9

Lifepo battery is almost "empty" if voltage is 3.0V.
Nominal voltage is 3.2V, perfect for Esp.

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10

my main question was "is it sufficient if I use this voltage with esp that are connected to other things"

11

3.2V Lifepo battery connected to Esp 3.3V pin is OK
3.2V Lifepo battery connected to MPU-6050 module is OK

Obviously you don't have 5V pin available on Esp.

12

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I think it does have a 5v pin

13

3.3V says output!
There is NO 3.3V input!

14

But if you power it from 3.3V pin, 5V is not available!
Is this board Esp8266?

15

wait!
Are we talking about to power the esp chip?
I thought the output pin is for output
did I misunderstood it :smiling_face_with_tear:

16

The 3.3V output pin is for output, so where do you plan on connecting the battery?
Not to the 5V input.

17

What is that board? Do you have a link?

18

I want to connect the battery to power the esp chip through 5v pin

19

Then you need 4AA, but it's wasting a lot of battery. 40% is burned in conversion.

20

I want to connect the battery to power the esp chip through 5v pin

Then you need a battery with a voltage greater than 5V.
4 AAs or two 3.7 Li-on in series.

You cant use just one battery