ESP8266 Community Forum

- Mon Oct 31, 2016 10:42 am #57441 Hello. I'm doing a test and when I put the CH_PD to 3.3V it is not working because the current isn't enough. What is I need for to solve this problem? I'm using a external power supply. I tried with a voltage divider but all is OK while the CH_PD is disconnected.

Thank you

- Mon Oct 31, 2016 11:03 am #57444 You seems to talk about 2 different subjects here ...

CH_PD need to be pulled-up to 3.3V, otherwise, the ESP will be disabled, therefore turned Off.
Leaving pin floating is not a good practice.

About converting 5V to 3.3V, are you talking about level shifter with voltage divider on the RX pin ?
Or are you talking about power supply to be regulated at 3.3V ?
You can NOT use a voltage divider for power supply !
You absolutely need a voltage regulator !

- Mon Oct 31, 2016 11:23 am #57446

You can NOT use a voltage divider for power supply !
You absolutely need a voltage regulator !

Thank you one more time. I used a voltage divider for power supply, my mistake, now I'm using it in TX and RX pins. What kind of voltage regulator I need?

Other question: It really necessary a divider voltage between arduino and esp? because I don't use it and I've never broken a module

- Mon Oct 31, 2016 11:52 am #57450 Voltage regulators ?
AMS1117, if you don't care about quiescent current (not good for batteries)
Others : SPX3819 or XC6203

Voltage divider ? although there some debates on 5V tolerance of ESP RX pin, I would recommend to have voltage divider there.