In this circuit, the diode bridge converts the AC sinusoidal wave to an equivalent pulse that will occur 100 times in a second. For beginners, this might be confusing so, please go through the zero-crossing tutorial to understand the basics. The best time to start switching an AC wave is when it is crossing the zero point. But why should we do it? Its because we have to switch (increase/decrease) this AC voltage to control the speed of our fan. If you are new to EMI, you can check out the article on basics of Electromagnetic Interference and also the Design Techniques for Reducing EMI in SMPS.Ī zero-crossing circuit is used to detect the time or event whenever the sinusoidal wave crosses the zero region. The purpose of L4 is to reduce the common-mode EMI to be entered in the SMPS module.
This is further converted to the required 3.3V for the microcontroller using the AMS1117-3.3V LDO regulator U2. The Hi-Link 5V 1A module is used to convert AC 230V mains to the DC 5V 1A. However, since we are using ESP12F, we require 3.3V to run the microcontroller unit. Here, PS1 is the power supply unit that is converting AC to 5V 1A, which is used for circuit-level operation. Two voltage levels are required to run the circuit. The circuit consists of the following things: Well, the working of the circuit is not so complex and is pretty straightforward. The complete circuit diagram for IoT based Fan controller is given below: IoT Based Fan Speed Controller Schematic Diagram To deliver the above project requirements following components are needed: Have a Buzzer that will notify the user when any changes in the state are happening.Control up to 250 Watt of appliances on a single go and without much modifications.Use Mobile application (not custom but readymade tool).Use an internet connection and connect to the nearby Wi-Fi network to get internet connectivity.
Wifi fan control series#
Components Required for Building the IoT Based Fan Speed Controller This compact design was made possible by the PCB boards fabricated by PCBWay, we will also show you how the board was designed and ordered from PCBway. So, let's take a look at the project plan and build a well-crafted IoT based fan regulator.
Wifi fan control install#
We have designed the complete system to fit into a compact enclosure making it easy to install and mount it with your ceiling or wall fan. This circuit differs from others in two ways firstly, it is a TRIAC based control and secondly, it is very easy to install. So here, in this project, we’ll be making an IoT fan speed control circuit to control the speed of a regular fan or other appliances using Blynk.
There are many IoT based home automation projects available on the internet but none of them provides you an option to control the speed of fan over the internet. Well, IoT is trending everywhere and is one of the greatest things that can be used to make life easier.