How to power ESP8266 WiFi Module from 5V supply

First of all, if you don’t have an ESP8266 WiFi module then you can purchase a pair online from https://amzn.to/2Ncwfcm at lowest prices.

You will also need a LF33CV regulator for voltage conversion, get it from https://amzn.to/2NfJWHs

ESP8266 operates at 3.3V and consumes around 150mAmp current, for designing of its power supply we can use LM1117-3.3V Low drop out linear regulator having max current capacity of 800mAmp.

You can also use LF33CV in place of LM117 if required.

When connecting ESP Module to micro controller always remember to shift the logic level at RX pin of ESP module from 5V to 3.3V otherwise the pin will eventually get damaged. Just follow the following diagram and you will have nothing to worry about.

Powering ESP8266 from a 5V source

You can make a simple adaptor board with built-in regulator and to convert TTL logic into 3.3V using the above circuit diagram. We used LF33CV as voltage regulator for our purpose. Only 4 pins are required for data communication i.e. VCC, Gnd, RX, TX.

ESP8266 5V compatible adaptor


ESP8266 5V compatible adaptor connected with PL2303

If you want to learn how to connect ESP8266 Module with your computer / laptop then check out this article.

ESP-01 ESP8266 2.4GHz Wireless Module – BLACK $2.69

Upgraded Version 1M Flash ESP8266 ESP-01 WIFI Transceiver Wireless Module $3.19

Check out variety of ESP8266 WiFi Module at Amazon


Buy PL2303 from Amazon – https://amzn.to/2uw8mof

Buy PL2303 from alternate source for $1.47

Checkout Amazon Store for PL2303


You can also make a 3.3v compatible adaptor eliminating the need for a regulator (Check out this article for details)

Absar A. Ansari


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