My esp8266 worked with 5 volts instead of 3.3 volts

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My esp8266 worked with 5 volts instead of 3.3 volts

By ironheartbj18
- Fri Nov 04, 2016 5:08 pm #57674 I am using the 5 volts pin of FTDI USB/UART adapter (3.3v FTDI). Why my esp8266 required 5 voltages instead of 3.3 voltages? I have seen some of other blogs must do with 3.3 volts. When I am working on with 3.3, the esp8266 was slightly red flashing not even the blue light turn on. The uploaded firmware had failed. I just do not understand why they are strongly recommended to use the 3.3 voltages.
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Re: My esp8266 worked with 5 volts instead of 3.3 volts

By RichardS
- Fri Nov 04, 2016 9:11 pm #57681 This is one ESP out of millions and most 99%+ of them DO NOT LIKE 5V :-)

At the silicon level by the manufacturer they are not meant to run on 5V, does not mean they won't, but for sure most will not.

RIchardS
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Re: My esp8266 worked with 5 volts instead of 3.3 volts

By rudy
- Sat Nov 05, 2016 5:31 pm #57715 If 5 volts were acceptable then why not run it at 12 volts, or even 24 volts. More voltage should make it go faster, right? :twisted:

I had accidentally run one of my modules at 5 volts. And I was shocked that it did run. But since then I can't use SPIFFs. Maybe something happened to the flash chip, or maybe the cpu.

They are designed to operate within a specific voltage range. If you run them at a higher voltage one of the possible results is overheating of the silicon and damage may result.
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