Hi,
Can I use any of these simple RF modules as Wirelss on/off switch without an arduino?
http://www.ebay.in/itm/433Mhz-RF-transmitter-and-receiver-Module-for-Microcontroller-Projects-/262067483727?hash=item3d0470744f:g:1mcAAOSwsB9WB4LB
My project is simple, I just want to power an LED wirelessly without an arduino.
Basically I was thinking whether is it possible to connect and LED to the receiver and power the Transmitter to light up the LED?
I'm a total noob,
Thanks in advance
No. You need some smarts to interpret the data coming out.
Otherwise, you just get random stuff coming out as the module responds to anything in its frequency range.
I don't think they have much drive capability either to support an LED.
Use one of these pushbutton keyfobs and receivers.
jremington:
Use one of these pushbutton keyfobs and receivers.
thanks but they are not available in my country 
CrossRoads:
No. You need some smarts to interpret the data coming out.
Otherwise, you just get random stuff coming out as the module responds to anything in its frequency range.
I don't think they have much drive capability either to support an LED.
Thanks for the info, but then can i do the same with the help of only 1 arduino micro at the receiver end?
no, you will need two arduinos
Noobian:
thanks but they are not available in my country
Ethiopia?
Surely!
Noobian:
Thanks for the info, but then can I do the same with the help of only 1 Arduino micro at the receiver end?
Yes. You would need to feed the transmitter with a pulse generator such as a CMOS 555 or a 74HC14. Crude but effective.
In fact, you could use a 74HC14 (or various other things) at the receiver end instead of an Arduino!
How would feeding the transmitter with a pulse generator work?
How are the 2 binary states differentiated?
mauried:
How would feeding the transmitter with a pulse generator work?
How are the 2 binary states differentiated?
In this case, the two binary states are "sending pulses" and "not sending pulses". The requirement is that the transmitter sends a modulated signal rather than a continuous carrier.
The receiver is discriminating a consistent modulation. It could seek a particular frequency (NE567) or simply use a charge pump with a 74HC14 to integrate the modulation level.
Paul__B:
Ethiopia?Surely!
Yes. You would need to feed the transmitter with a pulse generator such as a CMOS 555 or a 74HC14. Crude but effective.In fact, you could use a 74HC14 (or various other things) at the receiver end instead of an Arduino!
nope, india
is cmos 555 sames as a 555 timer?
im a noob, i think its complicated.
they are not available in my country
Is mail order not permitted in India?
mail order is permitted but ordering from adafruit, shipping becomes very expensive.
It would be easier for him if he uses two arduinos(you can buy very cheap arduino nanos from ebay with free shipping to India), setting up a 74HC14 would be complicated.
Those pushbutton modules come from China, and you can get them on ebay.
Or for 110-220 VAC
jremington:
Those pushbutton modules come from China, and you can get them on ebay.Or for 110-220 VAC
Yes, these would work and they are cheap....but an arduino nano comes at around the same price. That would be a wider option for learning, as he wont stop with just blinking an LED.
Srijal97:
setting up a 74HC14 would be complicated.
True. You have to learn to use a soldering iron.
Noobian:
is CMOS 555 same as a 555 timer?
Yes. The CMOS version is better. Comes under various numbers such as a 7555.
Noobian:
I'm a noob, I think its complicated.
Not half as complicated as programming an Arduino.
Actually, while you can use breadboards and such, I think learning to use a soldering iron is critical if you are going to embark upon any electronic project.
Srijal97:
Yes, these would work and they are cheap....but an arduino nano comes at around the same price. That would be a wider option for learning, as he wont stop with just blinking an LED.
Thanks, you are correct, Im not going to stop with just led, so your idea of 2 ardunio is better also becuase of its availablilty and cheap price in india
can I use arduino micro instead of nano? because i find micro usb port more convenient.
also will the cheap chinese ardunios available in india last for a long time? like a year or 2?
Yes, but the micro is almost double the price of a nano as it uses Atmega32U4. I would have preferred a nano, but its upto you.
The cheap chinese ones cannot be guarranteed to work. You may receive one which doesnt work at all...but they usually do work. And they will last as long as you misuse them.
Paul__B:
True. You have to learn to use a soldering iron.
Yes. The CMOS version is better. Comes under various numbers such as a 7555.
Not half as complicated as programming an Arduino.Actually, while you can use breadboards and such, I think learning to use a soldering iron is critical if you are going to embark upon any electronic project.
i have no problem soldering, but i just dont know that many electronic components and what they do or how they function.
i though the rf module does the same thing as the keyfob thing, but only now i learned that it is used to send data.
so i guess this is my only choice now
Srijal97:
Yes, but the micro is almost double the price of a nano as it uses Atmega32U4. I would have preferred a nano, but its upto you.The cheap chinese ones cannot be guarranteed to work. You may receive one which doesnt work at all...but they usually do work. And they will last as long as you misuse them.
thanks for the tips, i guess mini usb port will do for now
any idea how this is done?
my main concern is powering the arduino on the transmitter end, there are no ac power outlets there, how long will that arduino nano + transmitter last on a 9v battery?
Use the battery, it should last for a fair amount of time(not sure how long, that depends on which 9V battery you use)
Noobian, if I were you I'd buy one of those cheap Chinese key fob sets to wirelessly control the LED, AND some Arduinos to play with.
My key fobs w/ receiver only cost AU$4.79 each, here:- 433MHz Key Fob Set
Well worth the cost, but beware - some other sellers appear to include the receiver, but they don't. I discovered this the hard way with two other sellers.