Home Electric Controls - Step 3




Introduction: Home Electric Controls - Step 3

About: An avionics engineer by profession. I am a huge DIY freak and my proudest possessions are my tools. Since 2016, I have been interested in Arduino and using them to simplify / automate stuff that can be used …


Having made two instructables earlier viz. Bluetooth controlled switch (Android) and Remote control of the living room and dining room lights and fans, this seemed like the next logical step. Therefore in terms of learning for me, only the use of the bluetooth module was new. What the project entailed however was to get rid of those two not so great looking arduino control boxes mentioned in the two instructables above from the living room and dining room area and relocate them some place more discreet.

Towards this end I had to drill through the walls between the dining room and kitchen and do some cabling from the existing switches of the dining room (and similarly the living room at the other side) and bring it all together to the store area.

I got rid of the fancy LCD displays and just used the blue tooth module HC05, the arduino uno and a 8 relay module.

Step 1: Items Required

Arduino Uno board

HC05 bluetooth module

8 relay module,

adequate length of two core wire

IR diode, 220 ohm resistor and a bare PCB to solder the IR LED

Step 2: Pictures of the Finished Product

The IR LED on the existing switch module ,I thought,was a nice touch.

Step 3: Sketch and Further Improvements

Having made this little project, I am able to control three fans, four lights (not to mention the TV and turning on three other table lamps) using the older module I had made first.

While functionally there may not be a great deal of difference in the way this functions, aesthetically this project is a lot better.. Whats more when I used the AMR_Voice blue tooth controller for android phones, I am able to get all the lights to come on by just saying "Lights!"

I am thinking to myself "what next Jarvis?" Perhaps powering the arduino control module by solar may be the next logical step towards a smarter home design. Stay tuned.....

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    Stephine HubertC
    Stephine HubertC

    5 years ago

    Sir, may i have a look with you schematic diagram? I am quite a bit interested of your project. I just wanna see how your project flow.


    Reply 5 years ago

    Well baically the pin connection is as follows:-

    Tx and Rx pins of HC -05 on pins 0 and 1

    Relay_1 - Pin 2

    PIN 3 and Gnd on the digital side reserved for IR LED // Pin 3 +ve

    Relay_2 - Pin 4

    Relay_3 - Pin 5

    Relay_4 - Pin 6

    // Pins 7-9 reserved for LCD display use in future

    Relay_5 - Pin 10

    Relay_6 - Pin 12

    Relay_7 - Pin13

    There is nothing hard and fast. Configure it any which way you like. Hope this helps.


    5 years ago

    Just an update after having posted the instructable. Although I mentioned TATA Sky codes in my sketch, I am afraid that part of the code to control the dish TV setup box didn't quite work out.

    May be I will get to it at a later date. Sorry about not updating the remarks section.