555 timer FM transmitter





.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}







1












$begingroup$


So online, I found this 555 timer FM modulator circuit. But To make this a working FM transmitter, is all I have to do is attach an antenna to the output modulated signal? Or do I have to also have a series LC resonant circuit tuned to the carrier frequency?



Link: FM Modulator Circuit Using 555 Timer IC



Circuit:



Schematic of FM Modulator Circuit Using 555 Timer IC






555 radio







share|improve this question









New contributor




Highvoltagemath is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$








  • 1




    $begingroup$
    If you add a link to the article where you found this we might be able to point out some context that you've missed. Hit the edit button below your question ...
    $endgroup$
    – Transistor
    4 hours ago






  • 2




    $begingroup$
    I don't think you're going to ever have much luck using a 555 timer as an FM transmitter.
    $endgroup$
    – Hearth
    4 hours ago


















1












$begingroup$


So online, I found this 555 timer FM modulator circuit. But To make this a working FM transmitter, is all I have to do is attach an antenna to the output modulated signal? Or do I have to also have a series LC resonant circuit tuned to the carrier frequency?



Link: FM Modulator Circuit Using 555 Timer IC



Circuit:



Schematic of FM Modulator Circuit Using 555 Timer IC






555 radio







share|improve this question









New contributor




Highvoltagemath is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$








  • 1




    $begingroup$
    If you add a link to the article where you found this we might be able to point out some context that you've missed. Hit the edit button below your question ...
    $endgroup$
    – Transistor
    4 hours ago






  • 2




    $begingroup$
    I don't think you're going to ever have much luck using a 555 timer as an FM transmitter.
    $endgroup$
    – Hearth
    4 hours ago














1












1








1





$begingroup$


So online, I found this 555 timer FM modulator circuit. But To make this a working FM transmitter, is all I have to do is attach an antenna to the output modulated signal? Or do I have to also have a series LC resonant circuit tuned to the carrier frequency?



Link: FM Modulator Circuit Using 555 Timer IC



Circuit:



Schematic of FM Modulator Circuit Using 555 Timer IC






555 radio







share|improve this question









New contributor




Highvoltagemath is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.







$endgroup$




So online, I found this 555 timer FM modulator circuit. But To make this a working FM transmitter, is all I have to do is attach an antenna to the output modulated signal? Or do I have to also have a series LC resonant circuit tuned to the carrier frequency?



Link: FM Modulator Circuit Using 555 Timer IC



Circuit:



Schematic of FM Modulator Circuit Using 555 Timer IC






555 radio




555 radio






share|improve this question









New contributor




Highvoltagemath is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




Highvoltagemath is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question








edited 3 hours ago









Greenonline

93821023




93821023






New contributor




Highvoltagemath is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked 4 hours ago









HighvoltagemathHighvoltagemath

63




63




New contributor




Highvoltagemath is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





Highvoltagemath is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






Highvoltagemath is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.








  • 1




    $begingroup$
    If you add a link to the article where you found this we might be able to point out some context that you've missed. Hit the edit button below your question ...
    $endgroup$
    – Transistor
    4 hours ago






  • 2




    $begingroup$
    I don't think you're going to ever have much luck using a 555 timer as an FM transmitter.
    $endgroup$
    – Hearth
    4 hours ago














  • 1




    $begingroup$
    If you add a link to the article where you found this we might be able to point out some context that you've missed. Hit the edit button below your question ...
    $endgroup$
    – Transistor
    4 hours ago






  • 2




    $begingroup$
    I don't think you're going to ever have much luck using a 555 timer as an FM transmitter.
    $endgroup$
    – Hearth
    4 hours ago








1




1




$begingroup$
If you add a link to the article where you found this we might be able to point out some context that you've missed. Hit the edit button below your question ...
$endgroup$
– Transistor
4 hours ago




$begingroup$
If you add a link to the article where you found this we might be able to point out some context that you've missed. Hit the edit button below your question ...
$endgroup$
– Transistor
4 hours ago




2




2




$begingroup$
I don't think you're going to ever have much luck using a 555 timer as an FM transmitter.
$endgroup$
– Hearth
4 hours ago




$begingroup$
I don't think you're going to ever have much luck using a 555 timer as an FM transmitter.
$endgroup$
– Hearth
4 hours ago










3 Answers
3






active

oldest

votes


















3












$begingroup$

The original article states




The carrier frequency is set using the 5 kΩ potentiometer behaving as a potential divider with one end at Vcc and the other at ground. The frequency of the free running oscillator is set to approximately 455.50 kHz.




This is not in the FM radio band which extends from about 88 to 108 MHz so you will not be able to pick this up on your radio - unless you somehow manage to generate the right harmonics.



The preceding paragraph says




Here is a frequency modulation (FM) circuit that uses a 555 timer in astable mode to generate a sine wave carrier. GCSE students might find it interesting as they are often playing with the 555 timer IC.




GCSE is a UK second level school standard so I suspect that this might be part of a course studying basic electronics and that a matching receiver would be required.






share|improve this answer









$endgroup$





















    1












    $begingroup$

    The North America FM band is around 100MHz, which is a couple orders of magnitude higher frequency than a 555 can manage. You would also want a sinusoidal output so as not to splatter harmonics all over the spectrum (at odd integer multiples of the base frequency).






    share|improve this answer









    $endgroup$





















      1












      $begingroup$

      The author is confusing you with free running oscillator set to approximately 455.50 kHz which is the down-converted intermediate freq. , or IF frequency used for an AM radio.



      FM radio's use 10.7 MHz for the IF filter.



      This 555 timer circuit can generate FM square waves as a voltage controlled Astable from 3.3kHz to 4.4kHz but neither useful for AM or FM radios. 555's are never used in radio designs or any serious design for that matter.



      Mr. Peter J. Vis appears to have good Windows/Network/Router skills but weak on Electronic design. I would look elsewhere for better basic electronics books such as on my profile.






      share|improve this answer









      $endgroup$













      • $begingroup$
        @ Sunnyskyguy EE75 Thanks!
        $endgroup$
        – Highvoltagemath
        3 hours ago












      Your Answer






      StackExchange.ifUsing("editor", function () {
      return StackExchange.using("schematics", function () {
      StackExchange.schematics.init();
      });
      }, "cicuitlab");

      StackExchange.ready(function() {
      var channelOptions = {
      tags: "".split(" "),
      id: "135"
      };
      initTagRenderer("".split(" "), "".split(" "), channelOptions);

      StackExchange.using("externalEditor", function() {
      // Have to fire editor after snippets, if snippets enabled
      if (StackExchange.settings.snippets.snippetsEnabled) {
      StackExchange.using("snippets", function() {
      createEditor();
      });
      }
      else {
      createEditor();
      }
      });

      function createEditor() {
      StackExchange.prepareEditor({
      heartbeatType: 'answer',
      autoActivateHeartbeat: false,
      convertImagesToLinks: false,
      noModals: true,
      showLowRepImageUploadWarning: true,
      reputationToPostImages: null,
      bindNavPrevention: true,
      postfix: "",
      imageUploader: {
      brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
      contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
      allowUrls: true
      },
      onDemand: true,
      discardSelector: ".discard-answer"
      ,immediatelyShowMarkdownHelp:true
      });


      }
      });






      Highvoltagemath is a new contributor. Be nice, and check out our Code of Conduct.










      draft saved

      draft discarded


















      StackExchange.ready(
      function () {
      StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f435637%2f555-timer-fm-transmitter%23new-answer', 'question_page');
      }
      );

      Post as a guest















      Required, but never shown

























      3 Answers
      3






      active

      oldest

      votes








      3 Answers
      3






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

      votes









      3












      $begingroup$

      The original article states




      The carrier frequency is set using the 5 kΩ potentiometer behaving as a potential divider with one end at Vcc and the other at ground. The frequency of the free running oscillator is set to approximately 455.50 kHz.




      This is not in the FM radio band which extends from about 88 to 108 MHz so you will not be able to pick this up on your radio - unless you somehow manage to generate the right harmonics.



      The preceding paragraph says




      Here is a frequency modulation (FM) circuit that uses a 555 timer in astable mode to generate a sine wave carrier. GCSE students might find it interesting as they are often playing with the 555 timer IC.




      GCSE is a UK second level school standard so I suspect that this might be part of a course studying basic electronics and that a matching receiver would be required.






      share|improve this answer









      $endgroup$


















        3












        $begingroup$

        The original article states




        The carrier frequency is set using the 5 kΩ potentiometer behaving as a potential divider with one end at Vcc and the other at ground. The frequency of the free running oscillator is set to approximately 455.50 kHz.




        This is not in the FM radio band which extends from about 88 to 108 MHz so you will not be able to pick this up on your radio - unless you somehow manage to generate the right harmonics.



        The preceding paragraph says




        Here is a frequency modulation (FM) circuit that uses a 555 timer in astable mode to generate a sine wave carrier. GCSE students might find it interesting as they are often playing with the 555 timer IC.




        GCSE is a UK second level school standard so I suspect that this might be part of a course studying basic electronics and that a matching receiver would be required.






        share|improve this answer









        $endgroup$
















          3












          3








          3





          $begingroup$

          The original article states




          The carrier frequency is set using the 5 kΩ potentiometer behaving as a potential divider with one end at Vcc and the other at ground. The frequency of the free running oscillator is set to approximately 455.50 kHz.




          This is not in the FM radio band which extends from about 88 to 108 MHz so you will not be able to pick this up on your radio - unless you somehow manage to generate the right harmonics.



          The preceding paragraph says




          Here is a frequency modulation (FM) circuit that uses a 555 timer in astable mode to generate a sine wave carrier. GCSE students might find it interesting as they are often playing with the 555 timer IC.




          GCSE is a UK second level school standard so I suspect that this might be part of a course studying basic electronics and that a matching receiver would be required.






          share|improve this answer









          $endgroup$



          The original article states




          The carrier frequency is set using the 5 kΩ potentiometer behaving as a potential divider with one end at Vcc and the other at ground. The frequency of the free running oscillator is set to approximately 455.50 kHz.




          This is not in the FM radio band which extends from about 88 to 108 MHz so you will not be able to pick this up on your radio - unless you somehow manage to generate the right harmonics.



          The preceding paragraph says




          Here is a frequency modulation (FM) circuit that uses a 555 timer in astable mode to generate a sine wave carrier. GCSE students might find it interesting as they are often playing with the 555 timer IC.




          GCSE is a UK second level school standard so I suspect that this might be part of a course studying basic electronics and that a matching receiver would be required.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered 4 hours ago









          TransistorTransistor

          89.8k787193




          89.8k787193

























              1












              $begingroup$

              The North America FM band is around 100MHz, which is a couple orders of magnitude higher frequency than a 555 can manage. You would also want a sinusoidal output so as not to splatter harmonics all over the spectrum (at odd integer multiples of the base frequency).






              share|improve this answer









              $endgroup$


















                1












                $begingroup$

                The North America FM band is around 100MHz, which is a couple orders of magnitude higher frequency than a 555 can manage. You would also want a sinusoidal output so as not to splatter harmonics all over the spectrum (at odd integer multiples of the base frequency).






                share|improve this answer









                $endgroup$
















                  1












                  1








                  1





                  $begingroup$

                  The North America FM band is around 100MHz, which is a couple orders of magnitude higher frequency than a 555 can manage. You would also want a sinusoidal output so as not to splatter harmonics all over the spectrum (at odd integer multiples of the base frequency).






                  share|improve this answer









                  $endgroup$



                  The North America FM band is around 100MHz, which is a couple orders of magnitude higher frequency than a 555 can manage. You would also want a sinusoidal output so as not to splatter harmonics all over the spectrum (at odd integer multiples of the base frequency).







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered 4 hours ago









                  Spehro PefhanySpehro Pefhany

                  215k5165440




                  215k5165440























                      1












                      $begingroup$

                      The author is confusing you with free running oscillator set to approximately 455.50 kHz which is the down-converted intermediate freq. , or IF frequency used for an AM radio.



                      FM radio's use 10.7 MHz for the IF filter.



                      This 555 timer circuit can generate FM square waves as a voltage controlled Astable from 3.3kHz to 4.4kHz but neither useful for AM or FM radios. 555's are never used in radio designs or any serious design for that matter.



                      Mr. Peter J. Vis appears to have good Windows/Network/Router skills but weak on Electronic design. I would look elsewhere for better basic electronics books such as on my profile.






                      share|improve this answer









                      $endgroup$













                      • $begingroup$
                        @ Sunnyskyguy EE75 Thanks!
                        $endgroup$
                        – Highvoltagemath
                        3 hours ago
















                      1












                      $begingroup$

                      The author is confusing you with free running oscillator set to approximately 455.50 kHz which is the down-converted intermediate freq. , or IF frequency used for an AM radio.



                      FM radio's use 10.7 MHz for the IF filter.



                      This 555 timer circuit can generate FM square waves as a voltage controlled Astable from 3.3kHz to 4.4kHz but neither useful for AM or FM radios. 555's are never used in radio designs or any serious design for that matter.



                      Mr. Peter J. Vis appears to have good Windows/Network/Router skills but weak on Electronic design. I would look elsewhere for better basic electronics books such as on my profile.






                      share|improve this answer









                      $endgroup$













                      • $begingroup$
                        @ Sunnyskyguy EE75 Thanks!
                        $endgroup$
                        – Highvoltagemath
                        3 hours ago














                      1












                      1








                      1





                      $begingroup$

                      The author is confusing you with free running oscillator set to approximately 455.50 kHz which is the down-converted intermediate freq. , or IF frequency used for an AM radio.



                      FM radio's use 10.7 MHz for the IF filter.



                      This 555 timer circuit can generate FM square waves as a voltage controlled Astable from 3.3kHz to 4.4kHz but neither useful for AM or FM radios. 555's are never used in radio designs or any serious design for that matter.



                      Mr. Peter J. Vis appears to have good Windows/Network/Router skills but weak on Electronic design. I would look elsewhere for better basic electronics books such as on my profile.






                      share|improve this answer









                      $endgroup$



                      The author is confusing you with free running oscillator set to approximately 455.50 kHz which is the down-converted intermediate freq. , or IF frequency used for an AM radio.



                      FM radio's use 10.7 MHz for the IF filter.



                      This 555 timer circuit can generate FM square waves as a voltage controlled Astable from 3.3kHz to 4.4kHz but neither useful for AM or FM radios. 555's are never used in radio designs or any serious design for that matter.



                      Mr. Peter J. Vis appears to have good Windows/Network/Router skills but weak on Electronic design. I would look elsewhere for better basic electronics books such as on my profile.







                      share|improve this answer












                      share|improve this answer



                      share|improve this answer










                      answered 3 hours ago









                      Sunnyskyguy EE75Sunnyskyguy EE75

                      72.3k227103




                      72.3k227103












                      • $begingroup$
                        @ Sunnyskyguy EE75 Thanks!
                        $endgroup$
                        – Highvoltagemath
                        3 hours ago


















                      • $begingroup$
                        @ Sunnyskyguy EE75 Thanks!
                        $endgroup$
                        – Highvoltagemath
                        3 hours ago
















                      $begingroup$
                      @ Sunnyskyguy EE75 Thanks!
                      $endgroup$
                      – Highvoltagemath
                      3 hours ago




                      $begingroup$
                      @ Sunnyskyguy EE75 Thanks!
                      $endgroup$
                      – Highvoltagemath
                      3 hours ago










                      Highvoltagemath is a new contributor. Be nice, and check out our Code of Conduct.










                      draft saved

                      draft discarded


















                      Highvoltagemath is a new contributor. Be nice, and check out our Code of Conduct.













                      Highvoltagemath is a new contributor. Be nice, and check out our Code of Conduct.












                      Highvoltagemath is a new contributor. Be nice, and check out our Code of Conduct.
















                      Thanks for contributing an answer to Electrical Engineering Stack Exchange!


                      • Please be sure to answer the question. Provide details and share your research!

                      But avoid …



                      • Asking for help, clarification, or responding to other answers.

                      • Making statements based on opinion; back them up with references or personal experience.


                      Use MathJax to format equations. MathJax reference.


                      To learn more, see our tips on writing great answers.




                      draft saved


                      draft discarded














                      StackExchange.ready(
                      function () {
                      StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f435637%2f555-timer-fm-transmitter%23new-answer', 'question_page');
                      }
                      );

                      Post as a guest















                      Required, but never shown





















































                      Required, but never shown














                      Required, but never shown












                      Required, but never shown







                      Required, but never shown

































                      Required, but never shown














                      Required, but never shown












                      Required, but never shown







                      Required, but never shown







                      -

                      Popular posts from this blog

                      How to label and detect the document text images

                      Image
                      1 $begingroup$ This is what I mean as document text image: I want to label the texts in image as separate blocks and my model should detect these labels as classes. NOTE: This is how the end result should be like: The labels like Block 1, Block 2, Block 3,.. should be Logo, Title, Date,.. Others, etc. Work done: First approach : I tried to implement this method via Object Detection, it didn't work. It didn't even detect any text. Second approach : Then I tried it using PixelLink. As this model is build for scene text detection, it detected each and every text in the image. But this method can detect multiple lines of text if the threshold values are increased. But I have no idea how do I add labels to the text blocks. PIXEL_CLS_WEIGHT_all_ones = 'PIXEL_CLS_WEIGHT_all_ones' PIXEL_C
                      Read more

                      Vallis Paradisi

                      Image
                      Coordinata: .mw-parser-output .geo-default,.mw-parser-output .geo-dms,.mw-parser-output .geo-dec{display:inline}.mw-parser-output .geo-nondefault,.mw-parser-output .geo-multi-punct{display:none}.mw-parser-output .longitude,.mw-parser-output .latitude{white-space:nowrap} 33°03′S 71°37′W  /  33.05°S 71.617°W  / -33.05; -71.617 Vallis Paradisi Res apud Vicidata repertae: Civitas : Chilia Numerus incolarum : 296 655 Zona horaria : UTC-4 Situs interretialis Nomen officiale : Valparaíso Gubernium Consilium : municipal council of Valparaíso Geographia Superficies : 401 600 000 Metrum quadratum Coniunctiones urbium Urbes gemellae : Ovetum , Badalona , Santa Fe , Ora longa , Sciamhaevum , Quantunia , Callao , Bat Yam , Melaka , Novorossiysk , Busan , Corduba , Odessa , Rosario , Malacca , Barcino , Soteropolis , Franciscopolis (California) , Guanajuato, Silao Tabula aut despectus Despectus in portum sinumque et urbem Vallis Paradisi Vallis Para
                      Read more

                      Tabula Rosettana

                      Image
                      Tabula multilinguis Rosettana in Museo Britannico ostenditur. Tabula Rosettana, [1] etiam titulo OGIS 90 agnita, est stela decreto de rebus sacris in Aegypto anno 196 a.C.n. lato inscripta. Tabula iuxta Rosettam Aegypti, urbem in delta Nili et ad oram maris Mediterranei iacentem, anno 1799 a milite Francico reperta est. Inventio stelae, linguis duabus scripturisque tribus inscriptae, eruditis Instituti Aegypti statim nuntiata est; ibi enim iussu imperatoris Napoleonis eruditi omnium scientiarum (sub aegide Commissionis Scientiarum et Artium) properaverant cum expeditione Francica. Qua a Britannis mox debellata, tabula Rosettana Londinium missa hodie apud Museum Britannicum iacet. Textus Graecus cito lectus interpretationi textuum Aegyptiorum (in formis hieroglyphica et demotica expressorum) gradatim adiuvit. Denique textum plene interpretatus est Ioannes Franciscus Champollion. Ab opere eruditorum cumulativo coepit hodiernus scripturae hieroglyphicae linguaeque Aegyptiae a
                      Read more