electronicsfreak
Member
Hi All,
Hopefully a simple enough question for discussion. I am building an audio project with a single 5V DC supply, so I plan to add 2.5V to the original audio signal from a laptop, mp3 player, etc. before it is amplified and sent along it's way.
What would be considered proper isolation in this case, I.E. preventing any of that DC (particularly from that 2.5V reference) from ending up feeding the input of the audio source? is a single, simple first order capacitor HPF considered well enough? Would a stronger filter be required for something like this? (I plan to put the knee ~20Hz). Is there generally a defined frequency where "DC" (note the quotations) to that device is observed (say 1Hz, 5Hz, etc), where potential damage could occur?
Anyways, curious on your thoughts here.
-EF
Hopefully a simple enough question for discussion. I am building an audio project with a single 5V DC supply, so I plan to add 2.5V to the original audio signal from a laptop, mp3 player, etc. before it is amplified and sent along it's way.
What would be considered proper isolation in this case, I.E. preventing any of that DC (particularly from that 2.5V reference) from ending up feeding the input of the audio source? is a single, simple first order capacitor HPF considered well enough? Would a stronger filter be required for something like this? (I plan to put the knee ~20Hz). Is there generally a defined frequency where "DC" (note the quotations) to that device is observed (say 1Hz, 5Hz, etc), where potential damage could occur?
Anyways, curious on your thoughts here.
-EF