Audio signal generation ??

[wiwi]

Hi ,

I've an old PC USB speakers , and i want to generate an audio signal to be used in a RF transmitter ,
can i cut the jack wire and apply it directly to the circuit , or i need to connect a capacitor ?

The speakers jack wire has two colors yellow and white , does it matter which one to use as plus or minus ?

thanks

 

[mister_rf]

I think there is need to adapt output level signals to such signal that it can be connected to transmitter input. Because the speaker level signals are in range of volts , quite much attenuation is needed to match the signal levels. Need to test the colors of the wires(only two possibilities ), no rules related to the used colors. :grin:

Try this way:

 

[muthukumar_ece2004]

I think, you are trying to use this computer speaker as a microphone for RF transmitter, right? You can't use directly, because it may have some electronics components between speaker and output wiring.