Hi, I have a audio/video recorder that is desinged to operate off of battery. It takes a 5v input and is rated at 300ma. When the circuit is recording on battery power - the audio is very clear. When is attached to a mains source there is a low pitch rumble.
Am I correct to believe that this is due to the fluctuations in the AC source? I have read that these problems can be eliminated by placing capacitors in the circuit which will serve to level out the ac voltage.
Because I am an electronics begginer, I have cobbled my current setup together from three different circuits. I have a 12v adaptor that takes power from the mains, this then attaches to a car usb adaptor which takes the 12v down to 5. I then connect this 5v to my main circuit.
Could anyone please advise where and how I should connect my capacitors?
Would I be correct in thinking that I should cut the positive 12v wire and join it again with a capacitor? Maybe do the same for the positive wire between the 12v and 5v - and even again between the 5 and the actual circuit? How many do you think I would need to significantly reduce the nosie I'm experiencing?
Finally, what type of capacitors should I buy. If you can provide an exact model or link that would really help.
Many thanks for any help!
Am I correct to believe that this is due to the fluctuations in the AC source? I have read that these problems can be eliminated by placing capacitors in the circuit which will serve to level out the ac voltage.
Because I am an electronics begginer, I have cobbled my current setup together from three different circuits. I have a 12v adaptor that takes power from the mains, this then attaches to a car usb adaptor which takes the 12v down to 5. I then connect this 5v to my main circuit.
Could anyone please advise where and how I should connect my capacitors?
Would I be correct in thinking that I should cut the positive 12v wire and join it again with a capacitor? Maybe do the same for the positive wire between the 12v and 5v - and even again between the 5 and the actual circuit? How many do you think I would need to significantly reduce the nosie I'm experiencing?
Finally, what type of capacitors should I buy. If you can provide an exact model or link that would really help.
Many thanks for any help!