ACS712 can accurately measure current. Various blogs on the Internet have introduced the interface between the ACS712 current sensor and Arduino and other microcontrollers. In fact, all of their current measurement formulas (obtained for the ACS712 current sensor...
In this tutorial, I show how you can shift a signal from 5V to 3.3V. This is very useful if you want to connect anArduino(operates at 5V) to anESP8266(operates at 3.3V). The following Figure describes what we want to accomplish by the end of this tutorial. Method #1 – Voltage Di...