Let's say R=220 and C=100nF (the latter is a guess; you can take 22nF or so if you prefer). -3dB point of that RC combination is a bit over 7kHz. AC grid frequency is 50Hz or 60Hz depending on where your bed sleeps.
Let's say R=220 and C=100nF (the latter is a guess; you can take 22nF or so if you prefer). -3dB point of that RC combination is a bit over 7kHz. AC grid frequency is 50Hz or 60Hz depending on where your bed sleeps.