Dec 10, 2003 #1 kkdelabaca Full Member level 2 Joined Apr 18, 2003 Messages 140 Helped 2 Reputation 4 Reaction score 2 Trophy points 1,298 Activity points 1,105 audio modulation Hello, I need to modulate an audio signal for transmitting by optica fiber. Somebody knows some circuit to modulate and demodulate audio in FM, PWM... Regards!
audio modulation Hello, I need to modulate an audio signal for transmitting by optica fiber. Somebody knows some circuit to modulate and demodulate audio in FM, PWM... Regards!
Dec 16, 2003 #2 I Igor_S Member level 1 Joined Sep 7, 2003 Messages 34 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 324 Re: audio modulation Hi, You can use the 555 timer IC, applying audio to threshold pin. Thus you will get the PWM
Re: audio modulation Hi, You can use the 555 timer IC, applying audio to threshold pin. Thus you will get the PWM
Dec 16, 2003 #3 A Aoxomox Member level 5 Joined Jul 18, 2001 Messages 90 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,286 Activity points 1,294 Re: audio modulation Have a look at this datasheet: **broken link removed** I know there was a common part called RC4151, quite old and I don't know the supplier. -aOxOmOx
Re: audio modulation Have a look at this datasheet: **broken link removed** I know there was a common part called RC4151, quite old and I don't know the supplier. -aOxOmOx