Hello All,
I have some understanding of basic Electronics theory but not enough to design circuits, what I need is to filter the "noise coming from the power supplies that feed or laptop docking stations at work, it introduces audio noise to the speakers and some display issues on the VGA output. The supplies are 19 V 4 amp dc, can I just put a capacitor in parallel with the docking station or do I need something more complex? I do not have an oscilloscope so I am not sure what the frequency of the noise is, I expect it varies from supply to supply as the interference is worse on some than others. I just want a general purpose filter but have no idea on the capacitance value to use or the type of cap, electrolytic vs ceramic or polyester. I will end up having to make about 30 of these things so I'm hoping it is not too complex.
Any help or pointers would be great.
I have some understanding of basic Electronics theory but not enough to design circuits, what I need is to filter the "noise coming from the power supplies that feed or laptop docking stations at work, it introduces audio noise to the speakers and some display issues on the VGA output. The supplies are 19 V 4 amp dc, can I just put a capacitor in parallel with the docking station or do I need something more complex? I do not have an oscilloscope so I am not sure what the frequency of the noise is, I expect it varies from supply to supply as the interference is worse on some than others. I just want a general purpose filter but have no idea on the capacitance value to use or the type of cap, electrolytic vs ceramic or polyester. I will end up having to make about 30 of these things so I'm hoping it is not too complex.
Any help or pointers would be great.