remote controlled home appliances - small home appliances
I came back with a new instruction manual where we can control household appliances such as lights, fans, TVs.
Wireless connection according to the type of relay used.
I designed it with a simple RF trans. & receiv.
433 MHz module.
As we all know, this module can communicate as a single channel, but I have put an integrated circuit of the encoder and decoder to enable it to support four channels. Encoder-
Decoder ic is now very common. its basic principle is multiple input channels multiplexing, making it a digital signal, and then demultiplexing logic gates to four channels on the other side.
The relay driver used here is a CL100 transistor with an equivalent device of sl100.
Both are the same and are used here as a current amplifier for each channel.
One more thing to consider here is that you can't simply use the encoder
Decoder ICs B 'coz just press the button and there will be an output signal "1" on the corresponding channel, but when you release the button, there will be no output or "0" signal.
So for this I used trigger ICs for each channel; here 'CD4017'.
The CD4017 is a trigger IC, so you have to use four IC for four channels.
I have completed this project but I would suggest you guys to use the four trigger IC "74 hc175 ".
It can replace four "cd4017" integrated circuits, and can make it simpler by greatly reducing the condensation of wires.
The circuit diagram starts with the circuit.
We're gone. . . :-)1. Dotted PCB(Breakout board). 2. 433MHz. Rx Tx module(1 set). 3.
Female sales (not in diagram). 4.
Indicator light of required color (4 nos. ). 5. 1k ohms(1/4watt)resistor(4nos. ). 6.
100 uF/25 v Electrolytic Capacitor (4 nos. ). 7. 560ohms(1/4watt)resistor(4nos. ). 8. 180k ohms(1/4watt)resistor(4nos. ). 9.
100nF ceramic capacitors (4nos. ). 10.
BC558 transistor (4nos. ). 11.
CL100 metal cover transistor (
Equivalent to SL100)(4 nos. ). 12. CD4017 IC(4nos. ). 13.
16-pin dip ic socket (4nos. ). 14. HT12E IC(1nos. ). 15. HT12D IC(1nos. ). 16.
18-pin DIP for IC socket (2nos. ). 17.
Electronic buttons (4nos. ). 18. SPST switch(1nos. ). 19.
9 Volt universal dry battery (1nos. ). 20. Battery holder(1nos. ). 21. 39k ohms(1/4watt)resistor(1nos. ). 22. 1M ohms(1/4watt)resistor(1nos. ). 23.
12 inch long universal antenna or copper wire (2nos. ). 24.
6 Volt relay of desired current (4nos. ). 25.
Some single wires. 26.
Small plastic box for transmitter. 27.
Touch the soldering iron. 28.
A telescopic antenna for making an antenna or a 2 feet long 14SWG copper wire.
Guys, I'm not going to give you a lot of unnecessary steps.
Just important steps to consider, plz will not hesitate to bring it up if there are any questions!
So, we're going to do a receiver.
Starting with the PCB, plan and mark the location where the ICs are placed to keep the decoder IC separate from the trigger.
I did not use an over voltage regulator (LM7805)viz.
Shown in the schematic as I will adjust the DC adapter using 5 V.
But if you power the circuit with a voltage above 7, guys plz does use a voltage regulator.
Up to 12 V 5 V.
Weld the corresponding capacitors, transistors, resistors and LEDs of the IC socket and trigger IC near them.
If you are new to using these metal cap transistor pins, please follow the image to clear these details.
Look at the schematic several times before welding to avoid any mistakes, but after all we are human and we can try to be perfect. Haha. ; -)
I want to make the transmitter circuit as simple as possible, so instead of using the PCB, I save space by welding all the components directly.
After all the welding work is done, put the ICs into the socket.
Here, again, I am not using a voltage regulator and I would recommend that you do not use it because the transmitter has the ability to handle up to 12 volts, and its transmission range depends largely on it.
For your convenience, use the direct 9 volt battery and the SPST switch.
Then make its 4-channel button panel on a small PCB and drill holes on it to fix it on the plastic box (case)inside out.
Now calculate the required antenna length. very important.
A small error in the antenna can cause a huge loss of distance.
In this project, we are using a transmitter frequency with a wavelength of 433 MHz.
69 metres, about 27. 16inches.
Strictly speaking, the size of the antenna should be 1/2 or 1/4 of the wavelength. The 1/4 of 27.
About 16 inch.
82 inch, so we will make it exactly 6. 82 inches.
Our project is nearing completion. .
There are many types of relays on the market.
Typically, for these types of items, a 6 Volt operation relay is used, and their amps are different depending on the load.
I suggest that you separate the relay board from the receiver and connect their respective coil terminals with a wire, because if the AC power goes directly into the circuit incorrectly, it blows the entire receiver off
The relay pin is displayed in the image.
Connect one pin of the coil terminal to the ve power supply and the other to the collection pin of the CL100 transistor.
The movable contact pins and N/O pins of the relay are then connected in series with the required equipment to the power supply. WARNING:-
Be careful when using the power supply. Its too lethal.
If you are not confident about this, please ask someone with experience for help! ! !
All you have to do now is find a suitable adapter for the receiver circuit.
I'm using a normal phone charger. It gives 5.
3 V and 500 mA enough to power the circuit and drive the relay.
You're done with this.
Now enjoy the fun of wireless switching home appliances! ; -)