27 Responses to “Simple RF Receiver And Transmitter @ 27 MHz”

1. Dawer Zaman Says:
   November 13th, 2012 at 9:31 pm

   Hi,pyroeectro your rf projects have really made an interest and a new understanding in me
   Actually all your projects are awesome but the wireless ones are masterpieces

   Although im wondering if you could show me how to make a RF transciever

   You see i don’t know much about RF
   THANX anyways

2. jorge pablo Says:
   November 24th, 2012 at 10:36 am

   hi, i want to made this circuit

3. kazafy Says:
   November 27th, 2012 at 8:25 am

   ???? ?? ????? robot under water

4. Raj Kumar Mukherji Says:
   January 21st, 2013 at 4:13 am

   Hello Chris,

   Please note I had already posted my below request in the forum on Jan 20, 2013. However, thought of reminding you about it here as there is no response from you so far in the forum. 🙂

   My hobby is electronics and I am an IT professional working for Siemens. Just now I saw your project on: “Simple RF Receiver And Transmitter @ 27 MHz” and the clear explanation there made me speech less. In fact I was looking for something neat and clear as yours here for quite sometime. Thank you very much for all the effort you have made.

   Now, let me explain my objective for searching such a neat and clear project on RF receiver. I wish to make a wireless doorbell myself with a range of about 50 meters just like the Chinese made wireless doorbells (please refer to the below URL):

   http://yume-deals.blogspot.in/2012/10/t … -just.html

   Now, while surfing the internet for this, I came across another website: (http://www.talkingelectronics.com/te_in … index.html) that explains how to build one such with an operating frequency of about 303 MHz and which will use an in-built antenna. I was successful in making the transmitter part but could not make the receiver part. I had also purchased a ready made Chinese doorbell and could tune my home made transmitter unit with it nicely.

   Looking at your 27 MHz project, I would request you to present another project which will help your readers to make a 303 MHz Wireless Doorbell easily at home with a range of about 50 meters with a built-in antenna. Last but not the least, the beauty of the Chinese doorbell is that the receiver unit runs from just 3 volts battery and consumes 6 micro ampere current when idle!!

   Though electronics is my hobby but I could not afford an oscilloscope to my workbench as yet . However, I do possess a portable frequency counter:
   GY 560. Please also let me know if this will help me to test the receiver circuit.

   Waiting eagerly for your response.

   Thank you again for the wonderful project and your time to read this long e-mail of mine.
   Kind regards,
   Raj Kumar Mukherji

5. Aliff Says:
   February 1st, 2013 at 8:56 am

   Hi… I want to build this circuit. Can you explain to me about the Toroid part ? what happen if i use a 1uH inductor choke instead ?

6. Carlos Says:
   February 7th, 2013 at 11:29 am

   Could you give me more specifics of the toroid?

7. ramesh Says:
   December 27th, 2013 at 8:44 pm

   Kanne punde oula thevidiya kaane kuthi

8. SAVY Says:
   March 25th, 2014 at 6:47 pm

   WHAT IS THE TRANSMITTING RANGE OF THIS CIRCUIT..?? IS IT 50M OR HIGHER..??

9. Sidney Smith Ebot Says:
   May 7th, 2014 at 6:15 am

   Dear Admin,

   I am working on a receiver. I wish to find out how you calculated the value of the Capacitor and Inductor for the 27MHz receiver.

   In your circuit, you are using 6t inductor in the LC Tank.

   I am looking forward to read from you.

   Kind regards

   Sidney

10. fahad Says:
    July 3rd, 2014 at 6:01 pm

    Hi admin.. I wanna make this circuit… Can anyone plz help me..???

11. moshohli Says:
    July 10th, 2014 at 1:14 pm

    dear admin and everyone
    i hve built this ciruit recently and it works as demonstrated but when I use spectrum analyser I get 54Mhz carrier wave frequency instead of 27. please help.

    if you use an inductor of about 1uH above it won’t work aswell, why?

12. Chris Bird Says:
    August 11th, 2014 at 1:11 pm

    I have bread-boarded these circuits and am having difficulty with tuning the receiver. Any help is appreciated.

13. Francis Gresham Says:
    February 21st, 2016 at 12:22 pm

    I would like to build a couple of these simple rf transmitters / receivers . What do I need and the directions to do so. Thanks Francis Gresham

14. Zuhair Says:
    July 16th, 2016 at 6:38 am

    Dear Friend,
    This is a great tutorial and i successfully build it and its working. can you please share the design equations, DC Biasing and AC analysis of the receiver circuit?

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