Re: Taking the 'hummm' out of a circuit
From: Bill Bowden (wrongaddress_at_att.net)
Date: 10/13/04
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Date: 12 Oct 2004 20:30:06 -0700
"anonymous" <anonymous@catfarm.com> wrote in message news:<tDcad.215995$MQ5.98694@attbi_s52>...
> >
> > Looks like you are trying to get too much from the wall wart.
> > What is wall wart current rating at 18 volts and how much is
> > the load current?
> >
> > -Bill
>
> The wall wart puts out 400 mA. For my test I was drawing ~5mA.
Well, if the input is above 12 volts DC and the load is only 5mA,
the only thing I can think of is it may be oscillating.
Use the DMM to measure AC voltage at the output. It should
be very low at 5 to 10 mV. You could try a small capacitor on the
output, maybe 1-10 uF. Maybe that will help.
-Bill
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