IR Controlled Fan Speed Controller

Introduction

In this session we will discuss about IR(infrared) controlled fan speed controller, in this circuit it consists of 74HC164 shift register IC and relay with some non-polar capacitor.

Components Used 

1)74HC164 IC

2)PC817 optocoupler

3)5v four-relay

4)Non-polar Capacitor 3.3uF, 2.2uF, 1.5uF, 100nF

5)VS1838 IR receiver

6)2.2uF electrolytic capacitor

7)Leds

8)100E, 1K, 10K, 1M, 2.2E(1W)

9)5v DC

74HC164

In this IC there is 8-output of which we use only 4 to controller 4-relays

Pinout -

    

IR Receiver Circuit -

In this circuit it uses IR receiver VS1838 to sense ir signals and 74HC164 IC used to get serial output

from Q0 to Q3.

Components 

                              

IR receiver with 74HC164 shift register IC

Regulator -

In the regulator portion I used capacitor based regulator its main advantage is it does not makes any hum-sound or any distortive noise along triac based ac regulators. For better accuracy it uses 3 capacitors of 3.3uF, 2.2uF, and 1.5uF capacitors.

Here the basic circuit of Capacitor based regulator -

3.3uF, 2.2uF, 1.5uF

                 

 Circuit -                                                                                               

 In board PC817 optocoupler is used to protect from any high voltage spikes, in my case it is made on zero pcb.                                                                                                                                                        

The fully working circuit of IR controlled fan speed controller.                                                                                                                          

                                                                                                                                                                 

If you any problem ask me in the comments