Has anyone perhaps connected a Wemos D1 mini pro to an 18650 cell? I mean will the voltage from a single cell be enough to make the board work stably. From the schematic it looks like there is an RT9013 which is an LDO. According to the datasheet it should work because the drop out voltage is 250mV.

It will work, but until the voltage drops below about 3.6V, so you lose about half the capacity and the circuit may be unstable. The way I do it is that I hook up between D1 and the liion a module of the simplest single-cell powerbank for a dollar, which does the following: -charger for the cell -step-up 5V for D1 over-discharge protection for the cell

Brilliant in its simplicity! Thanks a lot. How about something like this?

Yes, you can even get it cheaper: Link .

Is the voltage from the 18650 cell sufficient for the Wemos D1 mini pro?

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#1 17070194 28 Feb 2018 15:46

xury xury

Automation specialist

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Post #1
17070194 28 Feb 2018 15:46

Has anyone perhaps connected a Wemos D1 mini pro to an 18650 cell?
I mean will the voltage from a single cell be enough to make the board work stably. From the schematic it looks like there is an RT9013 which is an LDO. According to the datasheet it should work because the drop out voltage is 250mV.
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#2 17070240 28 Feb 2018 16:06

quinty quinty

Level 28

» | Helpful post? (+1)

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Post #2
17070240 28 Feb 2018 16:06

It will work, but until the voltage drops below about 3.6V, so you lose about half the capacity and the circuit may be unstable.
The way I do it is that I hook up between D1 and the liion a module of the simplest single-cell powerbank for a dollar, which does the following:
-charger for the cell
-step-up 5V for D1
over-discharge protection for the cell
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#3 17070255 28 Feb 2018 16:15

xury xury

Automation specialist

» | Topic author Helpful post? (0)

Post #3
17070255 28 Feb 2018 16:15

Brilliant in its simplicity! Thanks a lot.
How about something like this?
https://pl.aliexpress.com/item/Battery-Case-5...-DIY-CASE-For-Cell-Phone-US/32807837015.html?
#4 17075352 02 Mar 2018 19:08

quinty quinty

Level 28

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Post #4
17075352 02 Mar 2018 19:08

Yes, you can even get it cheaper:
Link .
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