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Hello my friends! in this video we will control the Hello my friends! in this video we will control the ceiling fan speed, we will build a four speeds regulator, and control it using CADIO platform, this feature is now natively supported, so we will do the job without writing any code.
For the hardware, we need Three relays connected with the ESP.
Two polypropylene capacitors, the smaller capacitor is 2.2 micros, and the larger one is 3.3.
Also four resistors, connected with the capacitors to make two RC circuits.
The small capacitor circuit is connected to the first relay.
The large capacitor to the second relay.
And the third relay is connected directly to the fan, and to the other side of the two RC circuits.
Then the AC hot wire is connected to the three relay's common pin.
And the neutral to the fan.
For the manual control, we will need two pushbuttons connected to the ESP, for increasing and decreasing the fan speed.
Now in the info file devices table, we add a new fan device.
Then in the fan speed regulator table, we select the GPIOs for the small and the large capacitor relays, and the direct relay, and the two pushbuttons.
The fan device appears in the application Interface with a ceiling fan icon, and when we enter the device page, we can see that we have a slider to control the fan speed.
When the fan is off, the three relays are off.
And at the first speed, the first relay is on.
With the second speed, the second relay is activated.
At the third speed, both of the first and the second relays are on.
And with the maximum speed, the third relay is activated, and this is exactly what we want.
We can also use the pushbuttons for the manual control, to increase or decrease the speed.
Now with our circuit connected to the fan, we can test it!
At the first speed, the small capacitor is limiting the current too much.
Now with the second speed, the large capacitor is passing more current.
In the third speed, the two capacitors are now working in parallel, and passing more and more current to the fan.
And with the maximum speed, the fan is now connected directly and finally takes all the current it needs.
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