Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
So, it does not work all that great then, does it?maor said:it works great even so there is some noise and im no sure about the range of the transmitter.
In which case, the circuit was not working as its designer intended.maor said:Also when i removed the coil from the circuit there was no difrence in any way from with the coil and W/O the coil.
So, you did not use the correct components.maor said:I think the noise is being caused by the face im using just random(with the correct values) caps the circuit did say use 1% low noise caps but i don't i have any of those so i just used any kind of cap i had.
I guess not.maor said:I think i didn't do the coil right...
No, it is not.maor said:Is the coils purpose to like lower the noise in the transmittion?
was it so hard to explain it to me like that?JimB said:Oh, by the way, plug in breadboards dont work very well at high frequencies, I speak from experience.
Many years ago, I tried to lash up an oscillator running on 20Mhz and used a breadboard, as much as I tried it did not work.
Taking the same components and soldering them to a piece of plain circut board, and gues what, the oscillator started as soon as I applied power, and near enough on the correct frequency.
So, maybe you did not understand when experienced guys try to give you advice.
Audio and Nigel are not little kiddies who have just fallen off the Xmas tree, listen to what they say and learn.
JimB
maor said:was it so hard to explain it to me like that?
now i understand why it can't done on a bread board...
one more question do you think it will work on AM freq?
EDIT:
forgot another question that i am not sure you will mange to answer
if the tuning cap generates the freq(right?) as in doing a chrage and discharge 88-108 million times a second how come when the capacitance is lower the freq is lower aswell? shouldn't it be the other way around?
btw nigel when someone asks you the question about why you can't make fm circuit on a bread board don't just give them the facts tell them why aswellNigel Goodwin said:No, that's the correct way, but it's not a question of 'charging and discharging', it's an LC resonant circuit.
Frequency = 1 / ( 2 x PI x Squareroot(L x C) )
I also wouldn't advice using a breadboard for anything higher than audio!.
maor said:btw nigel when someone asks you the question about why you can't make fm circuit on a bread board don't just give them the facts tell them why aswell
If by "AM Frequencies" you mean 500 to 1600kHz, I will stick my neck out and say yes it will, you will probably get away with it.maor said:do you think it will work on AM freq?
mange? a skin disease found in dogs and cats?maor said:forgot another question that i am not sure you will mange to answer
The tuning capacitor and the coil determine the frequency.maor said:if the tuning cap generates the freq(right?) as in doing a chrage and discharge 88-108 million times a second how come when the capacitance is lower the freq is lower aswell? shouldn't it be the other way around?
In the third reply to this thread, Nigel confirmed audioguru's analysis and explanation (in the immediately previous post to Nigel's) of the bread board problem. To reiterate what someone had just explained to you would have been pointless. I would've thought it to be comforting to have both one member give you the details, and another member second the motion, as it were.=maor said:btw nigel when someone asks you the question about why you can't make fm circuit on a bread board don't just give them the facts tell them why aswell