Comments on: FM Generation using 555 Timer https://electrosome.com/fm-generation-using-555-timer/ You Inspire.....We Create..... Sat, 27 Jun 2020 05:40:38 +0000 hourly 1 https://wordpress.org/?v=6.1.1 By: Today's Progs https://electrosome.com/fm-generation-using-555-timer/#comments/7120 Thu, 28 Jun 2018 21:37:35 +0000 https://electrosome.com/?p=6341#comment-7120 Hi there, thank you for the project but I have a problem
I made the circuit correctly and used the right capacitors and resistors with the right values but it didn’t work, I even checked the connections and there were no problems, I also tried every single FM wave from 87.5 to 108 and none of them worked, and I connected a antenna as well but no hope, can you help me please, thank you.
(By the way I used a 10uF 50V electrolytic capacitor if that matters, the 0.1uf capacitor is ceramic)
(something else, can i put a microphone at the input signal?)

]]> By: M https://electrosome.com/fm-generation-using-555-timer/#comments/6841 Tue, 08 Aug 2017 15:04:00 +0000 https://electrosome.com/?p=6341#comment-6841 Shouldn’t frequency be 1/(0.693*2*R*C)? The period is 2*0.693*R*C (As we are first charging and then discharging through the RC).

]]> By: Ligo George https://electrosome.com/fm-generation-using-555-timer/#comments/5774 Sun, 24 Jan 2016 07:47:00 +0000 https://electrosome.com/?p=6341#comment-5774 In reply to mohsin.

It should be in the Range 88 to 108MHz, but 555 will not work on that range.

]]> By: mohsin https://electrosome.com/fm-generation-using-555-timer/#comments/5752 Sat, 16 Jan 2016 07:04:00 +0000 https://electrosome.com/?p=6341#comment-5752 In reply to Ligo George.

what will be the frequency of modulation so i tuned my moble radio …sir!

]]> By: mohsin https://electrosome.com/fm-generation-using-555-timer/#comments/5751 Sat, 16 Jan 2016 07:03:00 +0000 https://electrosome.com/?p=6341#comment-5751 In reply to Aditya.

ya u can give 4 volt also

]]> By: Ligo George https://electrosome.com/fm-generation-using-555-timer/#comments/5666 Sat, 19 Dec 2015 09:46:00 +0000 https://electrosome.com/?p=6341#comment-5666 In reply to mario.

Please give me more details like the following.
1. Input Voltage
2. Input Frequency
3. How are you checking the output etc..

]]> By: mario https://electrosome.com/fm-generation-using-555-timer/#comments/5618 Tue, 24 Nov 2015 06:19:00 +0000 https://electrosome.com/?p=6341#comment-5618 lo arme igual que el diagrama y no logro conseguir la modulacion de FM, que frecuencia y amplitud debe tener la senl moduladora?

]]> By: Ligo George https://electrosome.com/fm-generation-using-555-timer/#comments/5588 Sat, 21 Nov 2015 08:48:00 +0000 https://electrosome.com/?p=6341#comment-5588 In reply to Aditya.

Yes.

]]> By: Ligo George https://electrosome.com/fm-generation-using-555-timer/#comments/5587 Sat, 21 Nov 2015 08:47:00 +0000 https://electrosome.com/?p=6341#comment-5587 In reply to Aditya.

Check the frequency limits of 555.

]]> By: Aditya https://electrosome.com/fm-generation-using-555-timer/#comments/5532 Tue, 10 Nov 2015 14:25:00 +0000 https://electrosome.com/?p=6341#comment-5532 Can the input signal be smaller than 5V p-p??

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