ESP8266 Community Forum

- Mon Feb 16, 2015 12:58 pm #9945

The data sheet says VDDIO 3.6 max, but which pin is that? Looking at the schematic on page 7, there is VDD, VDDA, VDDD, VDD3P3, and VDDPST, not to mention VDD_RTC.

exactly my esp working with 5v for past 2 hour and still working . still working

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- Mon Feb 16, 2015 1:03 pm #9947

it seems 5v no roblem for chip and pins.

How do you come to that conclusion? Page 15 mentions: "Input high voltage : 3.6 V (max)".

- Mon Feb 16, 2015 1:06 pm #9948

it seems 5v no roblem for chip and pins.

How do you come to that conclusion? Page 15 mentions: "Input high voltage : 3.6 V (max)".

i cant say anything but i am usig 5v and no burn no overheating,. i dont know i am just testing

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- Mon Feb 16, 2015 2:01 pm #9954 If I am reading the data sheet correctly, it looks like the Winbond flash chip is rated for an absolute maximum Vdd of 3.6 + 0.6 = 4.2V.

Getting back to the question of batteries, I'd say that, without a regulator, the following combinations are probably OK:

3 X NiCd or NiMH
2 X NiZn
1 X Li-ion

...but anything higher in voltage like 3 X alkaline is probably not safe.