It's possible that a single electrolytic capacitor across the poles of the rectified supply would do the job if you don't already have one. Hard to tell without a schematic. If that alone is not enough, I'd look to the LM317 as noted, to give you a regulated voltage.When using 3 Volts battery there is no hum in my condenser microphone but when I hooked it to AC rectified Power Supply it produces hum. Is there any circuit or component that can remove the humming?
Thank Sir AlbertHall for the link. I will try the Capacitance Multiplier which looks like a series pass regulator with only few components which are available in local stores here.
Thanks SirMost of those chargers have a lot of coupled noise. Are you using the charger to power the whole lot or just the mic?
Only one power supply should be used. It really is hard as you have still not put up any diagrams of your complete setup. What is the mic connected to?
I don't know why we often have to "beg" posters to give us enough info so we can help.
Filtering out the ripple may not help if it is mains switcher coupled noise. I've had a similar problem. It was trying to run a phone in a car as a music player. The audio connected to the chassis via the amp and the switch mode 5V supply connected too so there was a ground loop with the switcher regulator noise superimposed on it.
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