555 timer FM transmitterBuilding a UHF FM audio transmitter555 Timer Monostable Mode Self Triggering555 timer as FM transmitter vs. Tank Circuit555 timer digital clockOriginal 555 timer transistor output implementationCan Pulsed DC be used in a radio transmitter?How to improve design of naive MW AM transmitter for lab demoDriving LED with 555 timer and BC639 transistorInverted 555 Monostable Timer With a Sustained InputHow to make 555 timer output fall
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555 timer FM transmitter
Building a UHF FM audio transmitter555 Timer Monostable Mode Self Triggering555 timer as FM transmitter vs. Tank Circuit555 timer digital clockOriginal 555 timer transistor output implementationCan Pulsed DC be used in a radio transmitter?How to improve design of naive MW AM transmitter for lab demoDriving LED with 555 timer and BC639 transistorInverted 555 Monostable Timer With a Sustained InputHow to make 555 timer output fall
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$begingroup$
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:
555 radio
edited 3 hours ago
Greenonline
93821023
asked 4 hours ago
HighvoltagemathHighvoltagemath
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.
$endgroup$
add a comment |
$begingroup$
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:
555 radio
edited 3 hours ago
Greenonline
93821023
asked 4 hours ago
HighvoltagemathHighvoltagemath
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.
$endgroup$
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
add a comment |
$begingroup$
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:
555 radio
edited 3 hours ago
Greenonline
93821023
asked 4 hours ago
HighvoltagemathHighvoltagemath
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.
$endgroup$
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:
555 radio
555 radio
edited 3 hours ago
Greenonline
93821023
asked 4 hours ago
HighvoltagemathHighvoltagemath
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.
edited 3 hours ago
Greenonline
93821023
asked 4 hours ago
HighvoltagemathHighvoltagemath
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.
edited 3 hours ago
Greenonline
93821023
edited 3 hours ago
Greenonline
93821023
edited 3 hours ago
Greenonline
93821023
93821023
asked 4 hours ago
HighvoltagemathHighvoltagemath
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.
asked 4 hours ago
HighvoltagemathHighvoltagemath
63
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
add a comment |
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
add a comment |
3 Answers
3
active
oldest
votes
$begingroup$
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.
answered 4 hours ago
TransistorTransistor
89.8k787193
$endgroup$
add a comment |
$begingroup$
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).
answered 4 hours ago
Spehro PefhanySpehro Pefhany
215k5165440
$endgroup$
add a comment |
$begingroup$
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.
answered 3 hours ago
Sunnyskyguy EE75Sunnyskyguy EE75
72.3k227103
$endgroup$
$begingroup$
@ Sunnyskyguy EE75 Thanks!
$endgroup$
– Highvoltagemath
3 hours ago
add a comment |
Your Answer
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3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
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.
answered 4 hours ago
TransistorTransistor
89.8k787193
$endgroup$
add a comment |
$begingroup$
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.
answered 4 hours ago
TransistorTransistor
89.8k787193
$endgroup$
add a comment |
$begingroup$
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.
answered 4 hours ago
TransistorTransistor
89.8k787193
$endgroup$
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.
answered 4 hours ago
TransistorTransistor
89.8k787193
answered 4 hours ago
TransistorTransistor
89.8k787193
answered 4 hours ago
TransistorTransistor
89.8k787193
answered 4 hours ago
TransistorTransistor
89.8k787193
89.8k787193
add a comment |
add a comment |
$begingroup$
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).
answered 4 hours ago
Spehro PefhanySpehro Pefhany
215k5165440
$endgroup$
add a comment |
$begingroup$
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).
answered 4 hours ago
Spehro PefhanySpehro Pefhany
215k5165440
$endgroup$
add a comment |
$begingroup$
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).
answered 4 hours ago
Spehro PefhanySpehro Pefhany
215k5165440
$endgroup$
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).
answered 4 hours ago
Spehro PefhanySpehro Pefhany
215k5165440
answered 4 hours ago
Spehro PefhanySpehro Pefhany
215k5165440
answered 4 hours ago
Spehro PefhanySpehro Pefhany
215k5165440
answered 4 hours ago
Spehro PefhanySpehro Pefhany
215k5165440
215k5165440
add a comment |
add a comment |
$begingroup$
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.
answered 3 hours ago
Sunnyskyguy EE75Sunnyskyguy EE75
72.3k227103
$endgroup$
$begingroup$
@ Sunnyskyguy EE75 Thanks!
$endgroup$
– Highvoltagemath
3 hours ago
add a comment |
$begingroup$
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.
answered 3 hours ago
Sunnyskyguy EE75Sunnyskyguy EE75
72.3k227103
$endgroup$
$begingroup$
@ Sunnyskyguy EE75 Thanks!
$endgroup$
– Highvoltagemath
3 hours ago
add a comment |
$begingroup$
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.
answered 3 hours ago
Sunnyskyguy EE75Sunnyskyguy EE75
72.3k227103
$endgroup$
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.
answered 3 hours ago
Sunnyskyguy EE75Sunnyskyguy EE75
72.3k227103
answered 3 hours ago
Sunnyskyguy EE75Sunnyskyguy EE75
72.3k227103
answered 3 hours ago
Sunnyskyguy EE75Sunnyskyguy EE75
72.3k227103
answered 3 hours ago
Sunnyskyguy EE75Sunnyskyguy EE75
72.3k227103
72.3k227103
$begingroup$
@ Sunnyskyguy EE75 Thanks!
$endgroup$
– Highvoltagemath
3 hours ago
add a comment |
$begingroup$
@ 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
add a comment |
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.
Highvoltagemath is a new contributor. Be nice, and check out our Code of Conduct.
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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