Hello I am trying smart light switcher that is attached in front of my rooms light switch. It basically consists of an Arduino nano, ESP-01 (control the servos with Blynk), 2 servos (which turn the lights on or off), 2 buttons (to turn the servos manually), 2 LEDs (which turn on when the servos move).
I manage to power most components (Arduino, servos, LED's, buttons) except the ESP which needs 3.3v, I have tried making a voltage divided with a 1k and 2.2k resistor to power the module but it doesn't seem to work. Currently to make it work I connect a TTL serial converter to power the ESP-01. It seems to work but I need it to only have one power supply. How can i manage this? Would really appreciate some help, thanks!
The ESP-01 most likely needs more current than Your voltage divider delivers. Check the ESP specifications regarding the need for current.
Railroader:
The ESP-01 most likely needs more current than Your voltage divider delivers.
No doubt about that. A voltage divider cannot provide any current. As soon as you draw even a very small current, you change the output voltage.
Forget the Nano and esp-01. Get a Wemos Mini.
PaulRB:
Forget the Nano and esp-01. Get a Wemos Mini.
I wish I could but at the moment i'm unable to due to the quarantine. Would a step down converter or a voltage regulator do the trick?
marcelomm:
I wish I could but at the moment i'm unable to due to the quarantine.
It hasn't stopped me from ordered and receiving items from China. Even from Wuhan! I was careful to use a disinfectant wipe on the contents, of course, which came sealed in an anti-static bag. Disposed of packaging and washed my hands thoroughly!
marcelomm:
Would a step down converter or a voltage regulator do the trick?
Yes, but you need all the accompanying caps as recommended in the regulator's data sheet. You also need 5V-3.3V level shifters for the serial lines between the 5V nano and 3.3V esp-01. A Wemos is much simpler.