The Arduino Uno already has a 3.3V pin, but it can only provide upto 50 mA. For my purposes (esp8266), I needed to supply a constant 3.3V with current that could go as high as 170 mA. The Uno's 5V pin ...

Basic sensor setup for testing a 3144E hall sensor with ESP32 and running on 3.3v. Initial release Converted from Arduino to ESP32 pins Tested and working Updated to new ESP-IDF, Arduino components, ...