Remote Controlled Relay

Introduction: Remote Controlled Relay

I am always making electronic stuff. I like to do Arduino projects best. more projects coming soon!

In this project I am going to show you how to make an cheap remote controlled relay with an transmitter and receiver. This wireless relay can be used on anything and you can prank your friends by connecting it to an lamp and scare them ;)

Step 1: Parts and Tools

Here are the parts I used for this project, There are some parts in the photo that i did not use.


* Prototype PCB ( )

* 9v relay module ( )

* 2x 9v batteries

* 2x 9v battery clips/holders ( )

* 3mm red LED ( )

* 3k OHM resistor ( )

* 3x male headers ( )

* 3x female headers ( )

* SPDT slide switch ( Position-3-Pins-/221668364697?pt=LH_DefaultDomain_0&hash=item339c76d199 )

* 25cm copper wire

* small antenna (from an RC car remote)

* push button ( )

* Wireless transmitter and receiver ( )


* Soldering iron

* Soldering tin

* PCB cutter

* Screwdriver (for making the antenna)

* Hot glue gun

Step 2: Prepare the Parts

You need to desolder the terminal blocks on the relay module (if yours has any) and solder tree male headers instead, do the same with the transmitter.

Step 3: Schematic

Follow the schematic when soldering the project.

Step 4: The Transmitter

Solder on the parts like shown in the photos

Step 5: Wiring

Solder on the power wires and the rest of the wires on the remote, use an tick wire for the antenna connection.

Step 6: The Antenna

To make the antenna I used an 25cm long copper wire and twirl it around a screwdriver like shown in the photo.

Step 7: The Receiver

place the parts on the PCB and solder them on like shown in the photos, the antenna is a little bit hard to do because you have to thread it into two pin holes and solder it on the ANT connection on the receiver board.

Step 8: Glue

Heat up your hot glue gun and glue the battery clip to the pcb so that its stuck and don't fall off when you connect the battery. Glue the emitter to the battery holder.


Put the battery in the holder and screw the antenna on, than connect the receiver to the relay module and connect the 9v battery to the clip.

Now your ready to hack lamps, prank friends and the imagination is the limit.

Step 10: Video

here is an vide of the project in action and hopefully you get the same results :)


IIf you like this project than go check out my channel for more projects that you might like, and if you have any questions or tips for this project than make an comment or send me en massage. If you have made any of my projects than please share an photo of it in the comments :)



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    30 Discussions

    Hi, have you any experience using PVM input in transmitter and servo on reciver ?!

    Hello. I am trying to make this project using 12V relay with a 12V battery. Unfortunately when I press the button the relay does not react. Maybe i should use a different kind of a resistor?

    1 reply

    Maby it will work if you use a 5v regulator transitor for the receiver module so the 12v gets down to 5v.

    can i change the copper antenna nto a transmitter antenna ?

    1 reply

    I don't really know much about antennas and lenght of them and materials but you could just try it out and see if it works. There are some sites that can calculate your antenna, depending on the Mhz and the range.

    Do you mean on the remote or the receiver?

    I think the emitter will work on 3v but than I think the range would be weaker.

    I dont have an Android phone so I cant make a bluetooth app to do that or something like that.

    Yes but for that you need an microcontroller like an Arduino that you have connected with 20 or 10 buttons at the TX, than the RX would need an Arduino with all of the signal pins connected to it.

    20 parts and it only costs $1 dollar? 2 batteries alone would put you over 1 dollar.

    2 replies

    I did not mean that the project cost me 1$ but the receiver and transmitter costs 1$ (the two small boards)

    Hey ibenkos, check out my new instructable i.e, increasing the channels on this 433MHz RF module. You asked me to share it, so here's it.. ;)

    1 reply

    thaks for the offer, I will think about it :)

    i like this and also voted this instructables because it`s very simple because sometimes we require only one channel in that case it is best

    1 reply

    Sure! :)

    Its a nice and clean project. I'm too having the same trans. & receiver module. I'm going to use encoder and decoder ICs to increase the channels. :)

    1 reply

    If you do so than please share your project, I want to learn how you can do that :)