In this article I have explained how to make a simple RF remote control circuit using ready-made RF 433MHz and 315MHZ RF modules, and without incorporating microcontroler ICs.
With the easy availability of RF modules today making an RF remote control has become a childs play.
It's all about procuring the RF modules ready made from the market by spending a few bucks and configuring them together for the intended results.
Here I'll show you how to make an approximately 100 meter range RF remote control circuit using RF modules, without the help of any microcontroller stage.
To begin the assembly you will have to procure the following readymade RF modules and the respective encoder and decoder chips, for the present project we use the HOLTEKs modules:
RF 433Mhz Transmitter/Receiver Modules
The following picture shows the Rx (left) and the Tx (right) Modules.
The following figure shows the pinout details of the above modules.
Encoder IC = HT12E
Decoder IC = HT12D
The above encoder and decoder ICs do the jobs exactly as per their assigned names that is encode and decode the bit information for enabling easy interfacing with analogue circuits.
After you have procured the above components it's time to put them together.
Assembling the Modules
Configure the transmitter circuit by assembling the Tx (Transmitter) Module with the Encoder IC as given in the following circuit:
Next, assemble the Rx (Receiver) module with the decoder IC, as per the following diagram:
In the above Rx (receiver) circuit we can see that four of its outputs are terminated through LEDs at the points A.B,C,D and another output which is terminated via the VT pinout of the IC.
The four outputs A,B,C,D become high and latched in response to the pressing of the four push buttons shown in the Tx transmitter) circuit.
Pin13 switch of Tx influences the Pin13 output of the Rx and so on....
Suppose when output "A" of the Rx module is activated by the relevant switch of the Tx, it gets latched and this latch breaks only on activating any of the other outputs.
Thus the latch breaks only when a different subsequent output is rendered high through the Tx relevant push buttons.
The output from pin VT "blinks" momentarily every time one of the outputs A,B,C,D get activated. Meaning VT output can be used in case a flip flop is required to be operated.
The above can be very easily interfaced with a relay driver stage for operating any equipment such as a remote bell, lights, fans, inverters, automatic gates, locks, RC models etc.
How to Connect the Address Pins
The pinouts A0-----A7 of the Rx, Tx modules are very interesting. Here we can see them all grounded which creates an impression that these are of no use and are simply terminated to ground.
However these pinouts enable a very useful feature.
These address pinouts can be used for rendering a particular Rx, Tx pair uniquely.
It's simple, let's say for pairing the above modules we ensured that the address pins are identically configured.
Alternatively we could make the above pair unique let's say by opening A0 for both the modules. This will make the pair respond only with each other and never with any different module.
Similarly if you have more number of such pairs and want to make unique pairs out of them, just assign the pairs in the explained manner. You can do this by either connecting the address pins to ground or by keeping them open.
It means by rendering different configurations to the relevant address pinouts between A0 and A7 we can create a huge number of unique combinations.
The range of the above explained RF module is around 100 to 150 meters.
The above simple RF remote control circuit was successfully tested by Mr. Sriram on a breadboard, the following images of the built prototype were sent by him for reference.
Circuit Prototype Images
Making a 433 MHz, 315 MHz RF Remote Control with Relay Flip Flop
Building a hi-end remote control device using very few components today looks pretty plausible. The proposed remote control light switch circuit idea provides you with the opportunity of building and owning this amazing device through simple instructions.
Moreover the unit provides a 4-bit data to be exchanged between the transmitter and the receiver modules.
This Hi-tech remote control light switch enables you to control four individual lights or any electrical appliance for that matter from any corner of your house remotely using a single tiny remote control hand set.
Imagine switching a light, a fan, washing machine, computer or similar gadgets from any corner of your room without taking a step!
Doesn't that sound great?
Controlling a particular gadget remotely through a single flick of your finger definitely feels very amusing and amazing too.
It also gives you the comfort of doing an act without moving or getting up from a particular position.
The present circuit idea of a remote control light switch enables you controlling not only just a single light but four different electrical gadgets individually using a single remote control hand set.
Let’s try to understand its circuit functioning in details of the 433MHz Rx and Tx modules.
Transmitter (Tx) Circuit Operation
I have already discussed the wireless control modules in the above paragraphs, let’s summarize the entire description yet again and also learn how simply the stages may be configured into the proposed unit.
The first figure shows a standard transmitter module using the RF generator chip TWS-434 and the associated encoder chip the HOLTEK’s HT-12E.
The IC TWS-434 basically does the function of manufacturing and transmitting the carrier waves into the atmosphere.
However every carrier signal needs modulation for its proper execution, i.e. it needs to be embedded with a data that becomes the information for the receiving end.
This function is done through its complementing part – the HT-12E 4-bit encoder chip. It has got four inputs, which can be triggered discretely by giving them a ground pulse individually.
Each of these inputs produces coding which are distinctly different to each other and become their unique signature definitions.
The encoded pulse from the relevant input is transferred to the IC TWS-434 which carries forward the data and modulates it with the generated carrier waves and finally transmits it into the atmosphere.
The above operations take care of the transmitter unit.
Receiver (Rx) Circuit Operation
The receiver module does the above operations just in the opposite manner.
Here, the IC RWS-434 forms the receiving part of the module; its antenna anticipates the available encoded pulses from the atmosphere and captures them immediately as they are sensed.
The captured signals are relayed forward to the next stage – the signal decoder stage.
Just like the transmitter module, here too a complementing device the HOLTEK’s HT-12D is employed to revert the received encoded signals.
This decoding chip also consists of a 4-bit decoding circuitry and their outputs.
The received data is appropriately analyzed and decoded.
The decoded information gets terminated out through the relevant pin-out of the IC.
This output is in the form of a logic high pulse whose duration depends on the duration of the ground pulse applied to the encoder chip of the transmitter module.
How to use a Flip-Flop Relay Circuit at the Receiver module Output
The above output is fed to a Flip-Flop circuit using the IC 4017, whose output is finally used to switch the output load via a relay driver circuitry.
One such flip/flop idea is shown you may construct four of them to access each of the generated 4-bit data discretely and control four gadgets individually.
Whether you use it as a remote control light switch or to control many more appliances……the option is all yours.
Hi Mr, what is the difference between a simple resistor 1k and a 1k x 4nos resistor? a ceramic resistor? can I replace it with a simple resistor? thanks
you can use ordinary carbon 1/4 watt resistors for the above shown circuits
P.S.
4. How much is the power supply?
power supply is 5V.
the 2 way remote control article which you referred does not have a clear explanation or a diagram so it won't be feasible for me to elaborate on that.
Yeah you're right… -.-…so blur…can't even understand where to put the antenna…
Hi Swagatam,
I was wondering? :
1. The pins from A0-A11/1-8 & 10-13 of the HT12Encoder, are they all switches? I mean for basic wireless on/off switch?
2. If yes, how do I add more switches? Will I add 1Kohm resistor with one end connected to pin 18/VDD and the other end to pin A0-A11/1-8 & 10-13?
3. Better yet, can you modify the whole ciruit to make remote controlled car?
* The circuit should consist of:
-Motor A & B
-Switch A, B, C, D
-Press switch:
-A: Motor A turns clockwise
-B: Motor A turns counterclockwise
-C: Motor B turns clockwise
-D: Motor B turns counterclockwise
-Encoder/Transmitter
-Decoder/Receiver cricuit
plsss..Thanks!
Hi eshkariel,
A0 to A11 are address pinouts of the ICs, these are for enabling different frequency combinations to be set by joining these pins across each other and the ground thus allowing unique Rx, Tx sets to be generated.
I have already posted a toy car circuit in my blog, you can study it here:
https://www.homemade-circuits.com/2012/09/make-remote-controlled-toy-car-circuit.html
Hi swagatam, thanks for the detailed reply, i am now in the soldering stage (learning). will update once it is done.
all the best to you Rajnikanth,
Hi swagatam, i want to use the above rf circuit for remote brake and indicators lights on a helmet. How do i trigger s1 thru s4 as supply voltage is 12v in bike and powers only when brake and or indicators are swicthed on. regards rajanikanth
Hi Rajnikanth, for the Tx unit you will obviously need a battery in the form of a button cell or any other similar type….. for the Rx unit you can use a 7805 IC for converting the 12V to 5V.
…if the Tx is also intended to be installed in the bike then too identically you can use a 7805 IC for stepping down the supply…
hi, thank you for a speedy reply. I will now install separate batteries for both Tx and Rx modules. I want to know if I can connect the brake light, turn indicators (left and right) wires which will carry 12v directly to D0,D1,D2??? Please help me out here as this project is for all my helmets and bikes.
Hi, continued from previous post, can you provide schematics of how the 12v line can be used to trigger the s1,s2,s3 switches. regards rajanikanth.
I can publish it in the form of a new article with all the required details in it so that you can make it exactly as per the given info, however before that I would want you to provide me the whole application detail regarding the circuit, meaning how and why do you intend to use the units in your bike, this will help me to design the circuit correctly and entirely.
Hi swagatam, This circuit is for a helmet mounted remote brake and turn signal indicator. I bought one from ebay but ended up breaking it in a crash. the following link will show the model that i had (www.ebay.in/itm/Wireless-Helmet-LED-Break-and-Turn-Light-/291497878507?pt=LH_DefaultDomain_203&hash=item43dea0a3eb). When the brake is depressed, the three leds on the module light up, when the turn signals are activated the amber leds in the module light up. I have checked the previous project for this same application using a doorbell or using an fm radio, but i like this rf module better. Regards rajanikanth
Hi Rajnikanth, you can take the help of the following article:
https://www.homemade-circuits.com/2014/05/remote-controlled-wireless-water-level.html
In the first diagram, ignore the circuits with the yellow colored gates, we don't require those. refer only to the Tx circuit, the four switches can be replaced with the contacts from four separate relays…the coils of these corresponding relays can be now simply connected with the relevant bike lamp terminals…so when these lamps are switched ON, the particular relay also triggers sending a RF out from the Tx circuit.
For receiving this signal, you can use the second circuit shown at the bottom section of the article…..in this circuit eliminate the relay and replace its position with LEDs
as you can see only one channel is used in the diagram…you may use all the four outputs and repeat the transistor drivers stages with its own set of LEDs
these four LED drivers will respond to the four relays whenever any of those are triggered, the relevant sets of LEDs on your helmet will be seen illuminated
hello swagatam, i'm vedavyas can we make a wireless switch which operates over 1km range
Is there any circuit for that
hello sai, you'll first need to build or procure a 1km range Rx/Tx unit, after that we can modify these into a remotely operated switch design.
it cannot be modified because the ICs are internally set.
an RF long range transmitter can be tried, the FM receiver then can be modified for activating a relay.
then can you have any idea how to increase the range of this circuit or else do we have any other circuits for controlling more than 1km range
hello vedavyas, no that won't be possible.
hello swagatam i'm vedavyas can we increase the circuit range up to 1km by changing the rf modules
Thanks Sir,
helpful Post's,
you are welcome!
Sir,I have made this ckt and it is working.But initially all 4 outputs are HIGH and when I press a switch the output goes LOW.Can I reverse it?
Also can u pls xplain how to connect it to relays using L293D..When I connected ,all outputs are initially high and relays are ON.The working is just opposite.
Please help.I am doing this as my mini project.
Mohammed, you can use 4 PNP transistor like BC557 and connect it with the 4 outputs for reversing the effect.
the bases will connect with the IC outputs via 1K resistors, emitters to positive 5V and the collectors may be then used for getting the reverse responses.
Thanks for the reply. Can I use an IC instead of transistors
you can use a 4093 IC and connects its inputs (shorted) with the output of the RF IC for getting opposite logics
can i get the isis proteus file for the rf transmitter -receiver without microcontroller?
email id is sushantjoshi73@gmail.com
if possible i'll try to present it here…
Hello there, I tested the circuit again as I make a mistake before at TE pin . so here the result when i push the button the LED go off. How do I make the result push to on and not push to off? any idea/ suggestion?
Hi TD, yes it looks like the modules are working OK now…
I think you may have to refer to the datasheet of the ICs, I am sure somewhere this feature of the modules will be mentioned there…what you are experiencing is just one of the features of the modules and there should be certainly a changeover mode that could be implemented by doing some easy mod in the circuit….
please try and look for the datasheet for the remedy.
Hi there Swatagam Majumdar, today I bought a new transmitter and receiver and try it on the circuit and boom there is a result. ITS WORKING!!!! Im so happy.
I used NT-R03C-LF as receiver and NT-T10A as transmitter. So the problem before was caused by the module. By the way I got something to ask. Why is it the LED at output maintain on even i already open the switch? Is it the output latched? how to make it not latched?
There is one question, does the type of power supply effect the circuit? im using ic 7805 to convert the 9v battery to 5v and its DC.. do I need to use AC as power supply?
any regulated DC 5V will work, battery and 7805 are ideally recommended so your power supply has no issues.
Hello there sir, I tried your circuit but it didnt work too.. when i connect the circuit to the power supply the LED didnt turn on at all even when the switch at transmitter is on.. I want to show you the picture of the circuit. Can you leave your email here sir so that I can email you the picture?
Hello Team dare
Do the following test procedures:
Connect two LEDs across one of the selected Rx outputs. One LED from positive to the IC output pin and the other LED from output to ground, make sure both these LEDs have a 1K resistor in series
Now press the corresponding button of the Tx and see the response on the LEDs, initially one of the LEDs will be ON, on pressing the Tx button will flip the other LED ON shutting off the previous LED….this will prove the correct working of the circuit….if not then some other serious fault could be anticipated
Hello
I tried the test procedures,
Both LEDs at selected output is Off initially and then i press the Tx button the LEDs still off and i hold the button for few minutes suddenly both LEDs goes on and when I open the Tx button the LEDs still on.
That's a weird response, something's not right either in the circuit connections or the ICs itself, to get away from all these trouble i would recommend buying a ready made unit as explained here:
https://www.homemade-circuits.com/2012/08/how-to-buy-and-use-rf-remote-control.html
I need to make this work myself as it was for my final project.. 🙁
Aw i type so long to comment and it was blocked as there is an external link to show my circuit as it was not refered from your circuit….hmm ill make it short.
2.bp.blogspot.com/-shfJy0DaSyY/U89hfFyhSqI/AAAAAAAAABg/1cZIrS4cIyQ/s1600/1.png
Hello there sir,
The output D0-D3 at HT12E is connected to 5v, can you explain the function?
The capacitor C1 is used for?
Im using a different receiver, there was 6 pin for VCC, RXD, GND , SHUT , GND . ANT.
i tested the receiver with multimeter and the reading is the all the pin connected to each other using continuity and ohm test.. is it normal?? I bought 2 of them and both is the same..for your information the receiver model is CWC-12 and the transmitter model is CDT-88..
I hope i get a respond from you..thanks
Hello Team dare,
For all these details you may have to refer the datasheet of the ICs, because all the parameters are entirely designed and specified by the chip manufacturer.
Thanks for your respond sir.
For these 2 questions
"The output D0-D3 at HT12E is connected to 5v, can you explain the function?
The capacitor C1 is used for?"
i refer it to your schematic.
and what i mean with the receiver is the receiver module. I referred to the data sheet and it showed that rxd is the data output and shut is enable which is active low.
Did you see my circuit? 2.bp.blogspot.com/-shfJy0DaSyY/U89hfFyhSqI/AAAAAAAAABg/1cZIrS4cIyQ/s1600/1.png
The differents of our circuit are the position of resistor before the led, the capacitor and the 5v connected to the HT12E output D0-D3. I want to know the function of that so i can modify my circuit. Thanks sir.
Inputs of digital ICs cannot be kept open and hanging, therefore D0-D3 are terminated to the 5 V supply. C1 could be decoupling capacitor for ensuring proper switching of the IC.
Alright thanks sir for that information.. i will ignore my circuit and try your circuit.. wish me luck.
Thank for ur reply..! But as i read it datasheet. Its max power supply is 12v, and the and the Rosc is vary to the fosc and power supply accordingly to graph, but m not clear abt reading this graph. And it say that if the enable pin active, it contineusly scan and transmite as cycle..
don't bother about all those things, the operations are actually very simple as explained in the above article, I have used these units myself without any difficulty
….give me the datasheet link, the Vcc is normally 5V for these chips.
….yes it sends unique coded signals every second to the Rx… it's the special feature of these units, it ensures that the RF signals stay unique continuously and becomes impossible to decode by any other nearby bugged system.
here is sir! http://www.google.co.in/url?q=www.rfsolutions.co.uk/acatalog/HT12E.pdf&sa=U&ei=wj8hVIi8OcrboASr0IG4Aw&ved=0CDYQFjAG&usg=AFQjCNGaefwY5f21Xm7Ss67rWjiB50oxRQ
There are two variants, one uses 5V max and the other 12V max….but 5V is the optimal range for both the units, it depends on the user what supply range suits him better,
for the 12V unit you can use a 7812 to be extremely safe.
hi sir! i feel confuse with this two ic.. i have search many site about this.. some connect input of tx to Vcc n some connect to GND( switch D0-D3 ). does the output still the same? the output of the rx is the the same to the input of tx or inverse( like ur circuit when input go low the output go high).
one more, in ur circuit, when press D0 to low, does the output go high until the new code has recieved or just go high for a while recieving code?
about TE pin u had connected it to gnd directly. it means to enable it forever? does it keep transmitting to the rx even the swith is not pressed( D0-D3=high) ?
i have a pair of rf module label 315-330-433mhz. the tx module has the range up to 200m if use with 12v. if i use ic above with 12v. what the value of Rosc should i use?
for multi output can i use BCD to decimal converter at output to get 16 channel? if can which ic number?
i was blur with this for long. plz help me..
Hi Seok, when Tx switch is pressed, the Rx outputs become low….I think LED direction in the above Rx circuit is incorrect, it should be in the opposite direction meaning the cathode of the LEDs should be toward the IC pins and anodes towards ground.
TE is permanently connected to ground so that the circuit stays always enabled and ready for the button-press activation. It will transmit only when button are pressed.
The above circuit will not work with 12 supplies it's rated for 5V supplies only.
For 16 outputs you will have to use a 16 channel module, these are similar to the above except that they will have 16 outputs and buttons.
sir i want to make an model which alarms me only when water tank is full…and will it be effective if i use it between 3 floor and ground floor…?…..can u tell me tx and Rx that will be effective…
Anish the above explained design will work for your application as well, use only one of the outputs from the shown 4 outputs.
An amplified buzzer could also be a good option for the alarming, which will allow you to use an ordinary amplifier circuit instead of complex wireless Tx, Rx.
sir i would like to adapt this project but im having trouble with the output part…could you give me the extended circuit where the output part has four loads namely pure light bulbs..
thank you sir…
Genevive, you can refer to the following circuit for a better understanding:
3.bp.blogspot.com/-4q0V68SrAdI/U3h4FgZR0TI/AAAAAAAAG64/G2FYN68LDhw/s1600/remote+control+water+level+receiver.png
and please let me know the Antenna's will come along with Ckt or we need to make extra arrengement?
…….just connect a meter long of any ordinary flexible wire with the antenna point in the circuit
Hello sir,
Please tell me what is the output if more than one tx switch press in one shot??
Either 2or 3 or 4 ?
Is all LED will glow or only one will glow?
Aradhya
Hello Aradhya, all LEDs in Rx will glow if all the Tx buttons are pressed at once…according to me.
Hai, I made two sets of circuits. One set with 433mhz and another set with 315mhz. One board consists of 433mhz TX and 315mhz RX. Another board consists of 433mhz RX and 315mhz TX. The two sets of circuits working good when they are in shorter distance. I kept the two boards at seperate distance of 20 meters. Now when I connect the antenna in 433mhz TX and RX means, that circuit is working good. Then I disconnected the antenna from 433mhz TX, RX and connected the antenna in 315mhz TX and RX means, that circuit is working good. Now if I connect the four antennas in the 433mhz TX, RX and 315mhz TX, RX means the LED at the pin17 of th encoders are blinking (means the RX is not able to catch the signal properly). The two modules frequencies signals are interfering with each other. so the circuits are not working properly.I tried by changing the directions of the antennas, but still negative only. Pls suggest me a solution for these…
sorry no ideas, the RF modules are embedded systems and with so many frequencies messing around, it could be extremely difficult to determine the exact fault…
In my Rx unit there are 2 DATA pins. can i connect two data pins together and finally connect the pin 14 of HT12D ?
I did not understand what you trying to do,
anyway data pins should not be connected with each other directly.
Thanks for the quick reply. i will make remote control sliding gate during next week. Let u know if any prob happens thank you.
Sure, thanks!
Request answer followings.
1.433mhz Tx &Rx supply voltage is 5v. So can i use 6v relays as output with using base resistor (calculation made by https://www.homemade-circuits.com/2012/01/how-to-make-relay-driver-stage-in.html)
2.433mhz Tx &Rx supply voltage is 5v. can i use 12v operated relays with base resistor 56k?
yes 12V relay can be used but the 12V supply will need to be given separately to the relay.
use the given formula for calculating the resistance value….you can try 10K, not 56K, it's too high.
Hi Chandrakant, I don't think it's possible because the chip is preprogrammed and cannot be altered externally.
hiii swagatam, is there any way to increase its range or any other module available having range more than 500mtr? plz rply soon
Hai swagatam, how r u???
How is the integration process?? Am eagerly waiting for that…
Hi Sriram, I thought you might have already seen it, here's the link:
https://www.homemade-circuits.com/2014/05/remote-controlled-wireless-water-level.html
One doubt… suppose I am making two circuits with Tx1, Rx1 and Tx2, Rx2. Suppose if I press the switch in Tx1 means will it affect the Rx2??
yes it will unless you pair up the address pins uniquely for each Tx/Rx sets, please read the last section of the article above for a detailed info.
Hai,
I made the above RF circuit and the below link water controller circuit. Now waiting for the integration section…
https://www.homemade-circuits.com/2012/02/how-to-make-ideal-automatic-water-level.html
Hi, Is everything working correctly? Please let me know the results of the units, meaning how the relays are working and how the water level controller is responding, if possible with pictures.
It will help me to design the new circuit correctly.
There is prob in the water circuit… I connected a CFL bulb in the relay… when i power on the circuit, the bulb is always in ON state because sensor B and C are not in touch. Even though I short circuited the sensor A and C, the light is still in ON state only. Pls help…
please send the close-up picture of the circuit that you have made, I'll try to find the fault by seeing the connections, if possible.
Hai, Ignore the previous command. The water circuit working good… The problem was due to loose connection. And now its working grt…
OK!! that's great Sriram,
Hai, Now one prob in RF circuit… when I power ON the RF circuit, The four output LEDs are in ON state only. And when i press the s1 switch means the output D LED is goes off, if I release the switch s1 means the output D LED is in ON state. Like that four LEDs are working. Its reverse order. I need if i press the switch means the corresponding LED should wrong. Is there any wrong will be in my circuit?? Pls help..
Hi, reverse the LED polarity and connect the resistor ends to positive…..
…please send pics if possible, so that I can post them in the above article……do it only if it's convenient for u….no force.
Thanks Mr.swagatam… I changed the polarity as u said… now it is working correctly…
Below are the pics:-
imgur.com/BMlRW7v
imgur.com/oLqSS4n
Now waiting for the integration of the circuits…
Thanks Sriram, I'll use the images for the above article.
I'll try to post the relay integrations soon and let you know….keep in touch meanwhile.
sure… thank you 🙂
Thank you, wil let u know when I make the both circuits…
I did a long search in the net, but not able to find the 5 output Tx/Rx circuit. So i decided to continue the project with the above circuit itself. So i bought the RF module, encoder and decoder. Is is possible to connect the below link circuit with the above circuit??
https://www.homemade-circuits.com/2011/12/how-to-make-simple-water-level.html
yes it's possible, but it has only one relay, use it appropriately
sorry. Am not able to get a clear idea for connecting the two circuits. Can u able to provide me a circuit diagram for connecting the two circuits?? If water level goes below D0 means motor should power on, D1=half tank ( LED indiactor), D2= 3/4 tank (LED indicator), D3= full tank( LED indicator) and motor should shut off when water reached the D3 terminal. Please help…
It will be a little lengthy circuit, I will try to present it in my blog soon, in the meantime you can make both the circuits and keep them ready for the final integration as per my diagram.
1.In this circuit, u shown up for 4 input and 4 output. Is it possible for 5 input and 5 output?? If yes means how to modify the circuit??
2. I am planning to implement this circuit for my home over tank. Bocz am in 1st floor and tank is in 5th floor. In the above circuit, Instead of the push switches in the transmitter section, if i arrange the terminals D0-D3 inside the tank means, as the water raising, the one by one D0-D3 wil get in contact through the water and this wil transmit the signal to the receiver. So the output LEDs in the receiver wil turn on according to water level.
3. In transmitter, suppose D0 is the tank empty state means there will be no contact to none of the terminals inside the tank, so the LED in the D0 of receiver wil turn off, at this state the motor should turn on.
4. After the water level started raising, the D3 of the transmitter will get contact , so the D3 LED of receiver wil turn on . At this state the motor should turn off.
Please provide me the circuit for this…
Thankyou..
The above circuit cannot be modified for 5 outputs, you can Google for a 5 output Tx/Rx circuit, you may get it.
Or you can buy the modules readymade from the market.
The input switches can be attached to relays and toggled through water sensor circuits.
We will discuss the circuit later, first you arrange the transmitter modules, we'll proceed further once it's done.
that you would using such a RF receiver could make a tester for car remote control?
Suppose that the DATA line is closely linked to the transistor, which would include the LED when the receiver receives a signal from the remote control?
for what application?
i ts available all electric shop?
yes it's available readymade in the market, ask your local dealer about it
what i need to do this circute sir
hi sir,
can you teach me how to control(increase/decrease) the voltage by using remote control?
hi gekkoi, it will be quite a complex circuit, if possible i'll try to update it.
hi sir,
i made this ckt.
but the ckt is not running ???
what can i do?
Hi ashwinkumar,
pls give more details about the problem.
sir can i use your's rf Transmitter (https://www.homemade-circuits.com/2013/05/long-range-transmitter-circuit-2-to-5.html)in place of that rf module
that will work with FM radio only
sir , what is the cost of that RF Transmitter…………….or can i use a ir ……………or laser
around Rs.200/-
i have RF434 module , its working with your circuit..
Thank u . ..and one more question i buy 434mhz rf module its also work with
this circuit..
The above circuits are also RF modules, sorry i did not understand your question
Can i connect relay directly to A to D outputs..
and,, its tested circuit..
No, you will have to use transistors drivers at those outputs for driving relays.
you can use the same circuits and configure them to work with different frequencies by setting up and matching the pins across A0 to A7 of the respective Rx/Tx pairs.
ones sw1 press that relay1 on,another press off like that only NA.
TELL me ,the RF modules name or model no. TRANSMITTER and RECEIVER circuit …
It's greate, but where can i buy it or what is the name of the module because i cant fint it. Mabye its because i'm living in the netherlands
you can easily buy it online, search it on Google, and you will be able to find many online sources who market such devices.
But do you have a name of the modules?
433kHz RF Rx/Tx IC modules.
sorry it should be 433MHz not kHz